Flexible duct vs rigid. They return, regulate, supply and exhaust air.

Now that we’ve addressed the options you shouldn’t go for when choosing ductwork, it’s time to discuss rigid duct. So, many are choosing rigid ducts over flexible ducts. Some inspectors and dryer manufacturers allow up to 8 ft. The ductworks are categorized into two main divisions, such as rigid ducting and the flexible ducting. Dec 3, 2020 · To make the ducts several different types materials are needed, and each material must suit specific needs and regulation. So I'm hoping we can get away with a rigid duct for a trunk (running parallel to floor trusses) and then 6 inch flex duct going out to the exhaust and supply registers (through the webs of the floor trusses Mar 15, 2024 · Discover the essential types of ductwork for HVAC efficiency in our guide. Rigiflex duct requires no elbows as it can form tight 90 degree turns. If you can’t install it properly, use rigid metal duct. This general lack of upkeep saves homeowners time and money. The PVC Flexduct General Purpose Clear is a versatile and affordable ducting hose, designed to provide a cost-effective option for a vast array of ducting Nov 28, 2012 · (Readers, please let me know of any programs you’re aware of that ban flex duct. Apr 29, 2022 · Adding rigid fiberglass or foam to ducts costs $2. By using an aluminum dryer duct, you are using one of the most reliable and common types of dryer ventilation that can withstand the test of time, and should you ever require a new Jun 24, 2014 · Thread: Rigid vs flex duct. The installation of hard ducts is Nov 19, 2021 · Rigid; Flexible Duct. Flexible ducts are cheaper and easier to install than rigid ducts. Fibrous glass insulated flexible ducts systems are Sep 16, 2015 · To design for proper air flow with improperly installed ducts would be downright stupid, though. It’s fine to use a flexible duct for a bathroom fan. of flex—some less. Jun 6, 2023 · Liquid-tight flexible metal conduit; Intermediate metal conduit; Electrical metallic tubing; Non-metal conduits include: Rigid PVC conduit; Electrical non-metallic tubing; Here's a breakdown of each. Finally, round flexible duct is much more aesthetically pleasing than rigid ductwork, making it an ideal choice for use in both residential and commercial applications. The Origin Of Aluminum flex. Use it mainly for straight runs. Is flex duct worth the effort? In my opinion, flex duct is just fine as long as you don’t abuse it. 5-inch duct liner has an R-value of R-6, and a 2-inch duct liner has an R-value of R-8. Whats the difference between rigid and flexible duct. Aluminum pipe also offers better fire-resistance than the other flexible ducts, yet none are as safe as rigid metal duct. Duct tape has many uses, but sealing ducts isn’t one of them. We do have flexible connections on return and supply sides of air handler (which is hung). Dec 18, 2021 · In comparative experiments for being quieter, the flex duct wins the floor. I see what you’re saying about a big sweep of flex duct maybe being better for flow compared to a rigid duct 90, but my instinct is that the rigid 90 might actually be Shop Rubber-Cal PVC Flexduct 12-in x 144-in PVC Flexible Duct in the Flexible Duct department at Lowe's. blogspot. Flexible HVAC ducts are composed of a metal wire coil surrounded by a flexible metal sheath. Both of the types work seemingly fine in passing the airflow. Operating Pressure (inches water column) Positive = 6 inches H²O (1. Depending, I could easily see getting a 10-20% drop Aluminium Semi Rigid Duct. But they are more likely to get damaged because of their plastic body construction. Its unique woven fiberglass core is the most durable core available, and it promotes superior airflow. Most dryer problems can be fixed in an hour with a few basic tools and a continuity tester or multimeter—and you can do the work yourself with these simple instructions. Get insights on proper installation and mai We mainly divide ductwork into two main categories, flexible ducting and rigid ducting. Dec 2, 2022 · Flexible ducting vs. x 8 ft. Jul 30, 2024 · Highlights. I would suggest reading this page for the basic to understand how to install flex duct like Fabriflex. The main difference between flexible and rigid ductwork is that the former can bend and flex, whereas the latter can not. RELATED: The Body's Defenses Against Breathing Dusty Air. If any duct product should be banned, it’s duct board. Dec 3, 2016 · Duct wrap can take the form of rigid or flexible insulation materials, and the selection process should be based on a variety of conditions: round, oval, or rectangular ducts; indoor or outdoor installation; insulation R-value only or breakout noise control only, or both; and type of facility (e. This new patented duct combines strength and flexibility for easy and safe installation. The product is also covered in a heavy duty, silver Dive into the world of semi-rigid flexible ducts with our detailed Q&A guide. Oct 22, 2021 · Flexible ductwork is both easier and cheaper to install. Stated diameters refer to inner bore size. For R-12 flex duct insulation, for example, you would need 3-inch duct liners. Oct 19, 2022 · Rigid duct for range hood. This type of ductwork is less expensive and easier to install than rigid ductwork. Mar 13, 2013 · Image Credit: Air Diffusion Council The recommended way to turn a flex duct, according to the ADC's flex duct installation standards. In theory that means I could have a ~24x96 and 2 11x96 ducts. Flexible, also known as flex ducts, can be easily molded to fit a variety of positions. 5 inches wide. Flex ducts may be something to try. Look for the one that's UL rated, not the cheap junk. Mar 26, 2024 · The thickness of HVAC rigid ducts starts from 0. Example: 9’x9’ square duct equals a duct size of 81 square feet, so 81/10 = 8. Vent hood: A dryer vent hood includes a rigid duct that goes through the exterior wall with a wide hood to allow hot air to escape. 7: Flexible Probe Bracket (FPB) Formula 1: One averaging sensor pass for every 10 square feet of duct size, rounded up to the next pass. , office, residential, retail, school, hospital Apr 14, 2021 · Replacing flexible duct with rigid duct is a new craze now-a-days. Our innovative design with low profile ribbing ensures for less restrictive air flow and more efficient ducting than other brands of semi rigid duct. Rigid Metal Conduit. Some flexible duct markets prefer to avoid using flexible duct on the return air portions of HVAC systems, however flexible duct can tolerate moderate negative pressures. It’s covered by an added layer of fiberglass for insulation and a vinyl or foil jacket. A: Most of what’s being installed in new houses now is flexible ducts because they cost so much less than rigid, sheet-metal ductwork. https://www. Most buildings utilize both types of ducting as per the suitability. Kinks in flexible ducting must be avoided. The tool for this is a 'ductalator' a ductwork slide rule. Single layer aluminium flexible duct with a 4mm corrugation depth to allow the duct to be compressed for transportation; duct is supplied in 750mm long boxes and extends to 3m. 6mm (24 SWG) and 0. As such, it is mostly used as a type of dryer vent tubing. That is, a 6” fleixble duct will deliver the same amount of airflow as a 5” KD pipe duct. Fibrous glass insulated flexible ducts systems are We would like to show you a description here but the site won’t allow us. At higher velocities (>1000 fpm), the rigid duct will perform better, but there should not be higher velocities in a low pressure, residential system. In most cases, the advantages of flexible ducting outweigh its drawbacks, which is why it’s so popular. However, determining which type of ducting you need for your specific project. The cost to replace your existing ductwork with insulated new ductwork is higher than simply insulating your ductwork. Rigid ducting essentially enforces it's own installation rules, since it can't really be squished and bent around obstructions the flex duct can. Properly chosen insulated flex ducts can keep temperatures steady and save money in the long run. Aug 12, 2022 · Rigid ducts are more durable than flexible ducts and can withstand extreme temperatures. Apr 7, 2023 · If you choose a flexible vent hose, cut it down to size to avoid bends and kinks, which trap lint. Explore the advantages of flexible, rigid, and semi-rigid ducts, and learn how material choices like galvanized steel or fiberglass affect your system's performance and air quality. A hybrid approach to transitioning to flex duct and the benefit of silence. x 25 ft. Jan 8, 2024 · Pros and Cons of Flexible Duct vs. However, R6 and R8 are two of the most common options. Any flex duct will have more resistance to airflow compared to a rigid duct of the same cross sectional area due to the uneven nature of the flex duct’s internal surface. In some places, rigid works better than flexible and vice versa. Metal Duct. However, the most common way to vent a bathroom fan is using rigid ducts as the main duct and a short length of flexible duct to connect the bathroom fan to the main duct. Additionally, the ridges inside the ducts may somewhat obstruct airflow. They are made from Apr 24, 2010 · Re: Airflow in flex vs. Push the flex duct in as far as it can go, ensuring an exceptionally tight fit. rigid duct? The problem is with flex having a measurable standard to compare with. Flexible ductwork is easier to install than its rigid counterpart. Optimize your HVAC system's performance and enjoy a comfortable home environment. Flexible ducting is much less expensive and can be bought pre-insulated, but the flexible ridges really eat into your airflow. Flexible Vs Rigid Ductwork. I'm running a 12" metal round duct in a weird spot that will cause it to have 4 elbows within about 10ft of pipe. Rigiflex flexible yet rigid patented duct is electric and gas clothes dryer manufacturer recommended. This flex can hold its own weight for up to 1m and is used for extraction o Sep 26, 2017 · Semi-rigid aluminum flex vent does have corrugations, but the interior surface of the pipe is smoother than that of plastic and foil duct, making it less likely for blockage to occur. Rigid Ductwork. Flexible Ductwork Pros: Flexible ducts shine in their ease of installation, especially in tight or awkward spaces where rigid metal ducts struggle. Rigid duct elbow vs flexible duct bend? Hey professionals. If the main lines are flexible duct, sheet metal ductwork isn’t used at all. This in theory is what flex duct should be used for. Jun 25, 2020 · To get less than 1% compression would risk the duct being pulled so tight it would disconnect from one end. com/risingerbuild/For more information see my blog at www. To calculate the pressure drop in a compressed flexible duct, the graph provides a correction factor as a function of the duct length, that can be multiplied by the pressure drop that would A hard pipe is a rigid metal duct that runs from the back of your dryer to the outside vent hood. Rigid ductwork doesn’t offer these same flexible properties. The difference is that the metal is semi-rigid and less prone to crushing. Their Installing a rigid duct is also tricky because it needs to be covered in insulation with more transition points to be made. Aug 4, 2023 · However, kinks and bends in flexible ducts can limit airflow and the efficiency of the system. Both flexible and rigid ducts distribute air throughout your home. This means your HVAC systems won’t need to work as hard. Both types have advantages and disadvantages. Choosing between flexible ductwork and metal ducts is crucial for HVAC systems, affecting installation ease, airflow efficiency, and maintenance. Duct liner R-value is about R-4 per inch of thickness. Rigid ducts are long-lasting but can be trickier to install due to their inflexibility and weight. My contractor is going to install new ceiling. and Marked Semi-Rigid Aluminum Duct with collars, is ideal when all aluminum ducts is required by code in some gas and electric dryer applications. Well, if we’re not going to use flex, what’s left? There’s duct board — rigid fiberglass with a foil facing — but, in my opinion, that’s worse than flex. When it comes to narrow and hard-to-reach spaces, flexible ducting is the better choice. Seems to me it would need to be firmly attached to duct to dampen sound transmission. Samco Flex Ducts ® manufactures complete range of HVAC Ducts ranging from Flexible Ducts, Aluminum Semi Rigid Ducts, Round Spiral Ducts, Spiral Flat Oval Ducts and Rectangular TDF Ducts which are being used in the below mentioned building spaces flexible duct, 30% compressed flexible duct, and 45% compressed flexible duct. Because flex duct is spiraled inside it is more restrictive to airflow. (NAIMA members do not manufacture flexible ducts, but do supply the flexible duct industry with fibrous glass insulation. We will discuss the key differences between the two types, their installation process, cost considerations, energy efficiency , and maintenance requirements. The 4 in. 5″ wide. Pre attached collars connect directly to dryer and outlet. Feb 19, 2022 · Manufacturers say that rigid metal ducting outperforms flexible aluminum ducting, but they offer no data to back up these claims. This type of duct is commonly used in more permanent fixtures, such as indoor HVAC Nov 13, 2023 · There are a few different types of ductwork out there, including rigid, semi-rigid, and flexible ductwork. See if you contractor can do a hybrid approach, which will gain you some operational efficiency. In this blog we are going to compare rigid ducting vs. So I'm hoping we can get away with a rigid duct for a trunk (running parallel to floor trusses) and then 6 inch flex duct going out to the exhaust and supply registers (through the webs of the floor trusses Find Semi-rigid flexible duct at Lowe's today. Rigid ducts have two kinds of jointing methods; either slip & drive joint or TDC joint. Feb 20, 2013 · As long as flex duct is sized right (Manual D and a flex duct calculator), and installed right – less than 1/2″ sag, long radius bends (if any), and tight, sealed connections – it can work well. Oct 7, 2015 · Rigid ductwork consists of galvanized steel tubing and lacks flexibility. Apr 21, 2021 · Flexible Or Rigid Air Ducts For Bathroom Fans; Which Is Better? At this point, it should be evident that both flexible and rigid air ducts offer their fair share of benefits and drawbacks. This type of rigid ducting offers anti-static protection and in the case of high quality products, is flame retardant to EU- 82 – DIN 4102 standards. It is usually made out of aluminum and should only be used for transition ducting, rather than concealed in the walls or floors of your home. Pacific Air Semi Rigid Duct performs has superior performance due to its unique construction. I want to replace old flex plastic duct with rigid solid metal duct for smoother air flow. 750 Mar 22, 2017 · We're planning to install a Renewaire EV90P ERV with dedicated ductwork in our new 1900 sq ft home. rigid ducting: which should I choose? When you’re choosing between flexible ducting and rigid ducting, there are a lot of key factors to consider. 8mm (22 SWG) up to 1. Mar 29, 2023 · The poorly installed flexible duct is replaced with sheet metal duct from the air handler supply plenum to the distribution trunk ducts for more efficient home heating and cooling. Nov 21, 2023 · Semi-Rigid Metal Duct . We’re here to help. What's the difference between rigid and flexible duct? A hybrid approach to transitioning to flex duct and the benefit of silence. They don’t require much maintenance and last a long time. It also means less work for you or the HVAC professional installing the ductwork. It costs more money to switch from a flex duct to a rigid duct, however, some homes utilize both flex ducts and metal ducts. It all depends on what the individual’s preferences might be. However, flexible ducts have many turns and bends as they run through the entire house. 00 per square foot, and the cost of spray insulation averages about $5. Know their various pros and cons to choosing the suitable AC duct for your unit. Both have their good and bad sides. Aug 25, 2022 · Additionally, round flexible duct is less likely to sag over time than rigid ductwork, meaning that it will maintain its shape and performance for a longer period of time. Jun 6, 2001 · Is rigid duct that much superior to flex and should I use that, even if it’s a slightly more complicated installation? For what it’s worth, it’s a gas dryer and I find it odd that the by-product of the gas combustion need not be vented to the outside in the same way a gas water heater or furnace does. Rigid ducting offers the best airflow, but is more expensive and harder to install. 05″ to get an accurate calculation. Rigid ductwork is the second kind of ducting. There are mainly two types of AC ducts - flexible and rigid ductworks. Flexible air duct is used extensively in residential HVAC systems because it’s quick and easy to install. Flexible and rigid ductwork both require different cleaning solutions. Which type/brand of flex, how much sag, how many sag sections, how tight are the turns both in angle and taughtness will affect outcome. Sep 21, 2018 · This article will talk about the two types of ductwork; the rigid ductwork, and the flex ductwork, the pros and cons of each other, and any other information to help you in deciding what kind of ductwork is appropriate for your home. Basically all forms of HVAC ducts fall into two categories: Flexible or rigid. Jun 13, 2024 · Rigid vs Flex Duct Cost. But, it takes much less time than the rigid duct to install. Their sturdy construction prevents them from collapsing or deforming under pressure, so the need for repairs is rare. Therefore, for renovation projects, HVAC contractors often advise flex ductwork. It should be supported with straps that are a minimum 1. Flexible ducts are generally much easier to install because of their flexibility. Not all cleaning companies will clean flexible ductwork. This duct is patented and is electric and gas clothes dryer manufacturer recommended. . When should HVAC ductwork be repaired or replaced? graph, Figure 1, showing how compressing a fully stretched flexible duct increases the pressure drop; a single graph is used for all sizes of flexible ducts. The duct has R6 insulation which contains 33% more insulation than the standard R4. Air duct R-values can range anywhere from R1. 2 product. On the downside, they can be punctured and you have to be careful with flexible vents that sag and avoid kinks with these ducts. Insulated Flexible Duct R6 Silver Jacket is used in standard Heating and Air Conditioning (HVAC) systems and some venting applications. This duct is totally non combustible with a maximum oper Oct 17, 2002 · Duct work–flexible vs. But metal ductwork provides superior airflow and is more durable . One flex run to other side of home (crappy 30ft run) Question is if this was your home would you opt to replace the entire duct system with R8 flex ? Apr 26, 2021 · In my 2nd floor condominium, I need to replace bathroom ceiling and exhaust fan. 0mm (20 SWG) and 1. Jul 20, 2022 · Most significantly, AFC duct systems give homeowners confidence that their HVAC system will run for many years while being economical, easy to install, and sturdy. Feb 22, 2021 · So use rigid metal wherever you can and keep flex lengths to a minimum. Heavy Duty Semi-Rigid Aluminum Duct is UL2158A listed and marked for safe dryer venting. Flex ductwork is less expensive, but it may need to be replaced more frequently due to wear and tear. If you’re using flex round ducts, you need ducts with a 16-inch diameter. Aluminum foil flexible ducts have a layer of reinforced aluminum on the outside that provides protection against heat loss or gain while also increasing insulation performance. Features: Highly flexible R6 insulation value Effortless installation 25-feet long & 4” diameter A fire & UV-resistant construction Almost flawless, this phenomenal duct from Dundas Jaffine provides an excellent value for the money. The amount of flex duct is often restricted to a low number per home. Drop ceiling with rigid duct supplying all the bedrooms and bathrooms. Jan 4, 2017 · At the end of this month, I'm giving a little presentation at the ASHRAE conference in Las Vegas. Jan 19, 2021 · Flex duct needs to be installed properly, which means minimal bends, not crushed, etc. Rigid ducts are made from a variety of materials such as galvanized steel or aluminum, and they provide maximum efficiency for air flow. The default ducts you’ll see in houses now are flex-type ductwork, however, that does not indicate that it’s better for airflow. I recently had to tear out and re-do a register box in a bedroom that was half ass repaired by previous owner, and I went with flex duct. charliefreak. Many models Flex duct in short amounts (4 feet or less) is perfectly fine for quality and performance. Larry from EnviroVent demonstrates the differences between rigid and flexible ducting and how they compare in performance in installation. Sheet Metal Ducts: Usually made of galvanized steel or aluminum, these ducts are known for their durability and strength. Insulated ducting (flexible or rigid) is always better than uninsulated. Rigid Sheet Metal Duct Rigid sheet metal duct was tested for each size for agreement with existing ASHRAE / ACCA numbers (ASHRAE Handbook-Fundamentals 2005). Rigid ducting. Sep 16, 2015 · Allison, Allison, One of the “big takeaways” I gleaned from your Mastering Building Science course (where you touched on this topic), was that very short runs of flex duct were fine, and actually desirable, for connecting branches of rigid duct to supply registers, in the interest of ease of making the connection, and also reducing the transmission of noise or vibration to the register. It's going to be a budgetary strain to install hard pipe for all the entire system. The disadvantage of this type of duct material is that because they are relatively easy to install, every Dick and Harry thinks they can do the job. Image Credit: Air Diffusion Council The ADC flex duct installation standards recommend no more than 1/2" of sag per lineal foot of flex duct between supports that are no more than 4' apart. High quality ducting is essential to the effective running of a ventilation system. Rigid ducts are usually constructed in accordance with SMACNA standards. Metal Ductwork vs Flexible Ductwork. It is ideal when UL all aluminum duct is required by code in some gas and electric dryer applications. As with all components of construction, materials and labor costs need to be considered. Remember, when cutting and designing duct, the rigid can be cut in any dimension, eg. 1 We would like to show you a description here but the site won’t allow us. Mar 27, 2020 · Ductwork is the part of the HVAC system. Flexible ducts have a shorter lifespan compared to rigid spiral ducts, especially in commercial or high-traffic environments. Quieter than Flexible Ductwork. rigid? | Posted in Energy, Heating & Insulation on October 17, 2002 10:44am I’m a newbie in need of quick help re: duct materials. If you find that the fit is slightly looser than you’d prefer Because many dryer manufacturers recommend only the semi-rigid or rigid metal transition ducts, a rigid aluminum periscope duct is a better solution if the space is tight between the dryer and the wall, and the dryer and wall vent are close together. Apr 29, 2022 · Differences: The main difference between the two types of ductwork is that the metal ducts are straight and rigid sections of tubes while the flexible ducts are soft and can be bent or turned in any direction. Flexible ductwork would be ideal in spaces where rigid ductwork can’t fit. Spiral ducts can be round or flat oval and are commonly produced in sizes from 3” to 63” in diameter. Note: For everybody using metal duct calculators, you should input Flex duct = . Measure the length of flex duct and rigid duct that you need. Here are three things to look for so you can see if your flex ducts look OK: Flex duct should pulled tight to reduce inner air resistance. See full list on thetibble. It also is a transition duct that must be used outside of wall assemblies. When this happens, it can lead to higher energy bills, so replacing your old ducts with new ones […] Mar 26, 2024 · Generally, there are 3 types of ducts you can use to vent a bathroom fan; a) rigid metal duct, b) round flexible duct and c) round PVC duct. Here are some basics on each: Rigid ducts: The more common option found in homes today is rigid ductwork, which comes in either metal or reinforced fiberglass. They take pictures of terrible flex duct installations in crummy attics and link to this T Oct 24, 2022 · Replacing flexible ductwork with rigid is one of the best infrastructural improvements you can make to your home. Dec 6, 2023 · Importance of Insulated vs. Rigid Ducting. It is made of aluminum, galvanized steel, or stainless steel and is available in various sizes. A rigid duct will move air more efficiently and can be used over longer distances, but it is costly and hard to install. You only need about 2-1/2 inches behind your dryer for these these types of duct. This type of ductwork may also be made of fiberglass or incorporate fiberglass insulation. What works for one homeowner may not work for another. Rigid splits to supply kitchen and main living room (will be removing to demo stop ceiling in kitchen for more cabinet space). As you would expect, rigid ducts are created in a fixed position, usually made of metal, and can’t be bent or curved without damaging it. They return, regulate, supply and exhaust air. Comparison Summary: Semi-rigid. What is Rigid Ducting? Rigid ducts can be different areas. Feb 20, 2022 · The semi-rigid aluminum duct is ideal for applications where code requires an all aluminum product. Learn everything you need to know, from the basics to expert installation and maintenance advice. But first, let’s see the pros and cons of each duct. Rigid ducts come in both rectangular and cylindrical shapes, and they come in a variety of sizes and materials. risinger. David Regan created the first aluminum flexible duct back in 1975. 5 kPa) areas. Our premier product, the M-KC Flexible Duct offers a comprehensive solution to your HVAC duct needs. However, their accordion-like structure can lead to airflow issues, collapses, or kinks. If you can replace all flex duct do so, but accepting 1 or 2 feet of flex at the end of a pipe run is acceptable. ) Fibrous glass insulated flexible ducts can be used in applications where internal air temperatures do not exceed 250°F (121°C). Microlite FSK duct wrap comes with an FSK (foil scrim kraft) facing, designed to help ensure a closed system that prevents moisture drive and offers condensation control. Semi-rigid duct is easily formed by hand to form bends and offsets. However, both flexible and rigid ducts have things that made it better or worse than the other, yet, they are still suitable for bathrooms The Master Flow 8 in. Hardware stores are crazy for advertising this for dryer venting. Read below to learn the important considerations when deciding between flexible ducting and rigid ducting and discover what type is right for you. Foil duct has a narrower, rough interior that restricts airflow and a coating that is flammable. View Profile View Forum Posts View Forum Threads Apr 26, 2022 · Spiral duct is a rigid spirally wound tube usually made of galvanized steel, but can also be stainless steel, aluminum or copper. Feb 11, 2024 · AC Infinity Flexible Ducting Dryer Vent Hose. May 28, 2021 · Flexible duct is easy to install and has a long lifespan, it is a common choice for bathroom fan ducting. Show Printable Version; 06-24-2014, 06:13 PM #1. It also fosters mold growth far more commonly than rigid ductwork. We will compare the flex ducting vs rigid ducting. 5 to R11 and apply to all types of ductwork (including rigid and flex ducts). 00 – $4. The UL181 test requires a negative pressure of 200 Pa. Now, it’s true that a flexible duct will suffice in most situations, but what are the building code requirements? Mar 6, 2024 · Flexible ducts, also known as flex ducts, are made up of a coiled metal wire and a flexible plastic material. Non-Insulated Flex Duct. In this video, Alex explains the key features of our Semi-rigid Flexible Ducting. Flex ducts are less durable but more cost-effective and easier to install. What is semi-rigid ducting? Semi-rigid ducting is viewed as Mar 22, 2017 · We're planning to install a Renewaire EV90P ERV with dedicated ductwork in our new 1900 sq ft home. ) Alternatives to flex duct. Therefore cfm sizing between flexible duct work and rigid pipe is not the same. The bigger the rigid duct size, the thicker the sheet metal. That means that a 1-inch duct liner has an R-value of R-4, a 1. New manufacturing technology incorporated into this duct allows for easy rotation. Flexible ducts are easy to install and replace, but over time they become brittle and inefficient conductors of heat. Typical duct losses for flex ducts tend to be higher than with rigid metal ducting, but most architects and engineers don’t consider these losses when designing a new building or home. The rigid wire is permanently bonded to the core. Rigid ductwork is most common and is usually made of sheet metal, like galvanized steel or aluminum (which is also what semi-rigid ductwork is made of). It is harder to work with, crushes easily and is difficult to twist. HVAC contractors have actually stopped utilizing metal ductwork as their default duct product ever since the 1980s. x 6 ft. Dec 1, 2023 · Other popular types of semi-rigid circle-shaped ducts are aluminum foil flexible ducts, insulated flexible ducts, non-insulated flexible hoses and UL listed flexible hoses. Metal ducts are long lasting, better air flow, easy to clean, not effected by UV rays, easier to install, but can be more expensive unfortunately. Rigiflex with quick connect collars is flexible yet rigid. This type of dryer duct looks similar to an aluminum foil duct in that it is an accordion-style flexible metal tube. Looking at the page it captures just about everything I recall about what i found during my extensive research online. My part is on hard ducts. Firstly, it is important to assess the area in which the ducting will be installed. 12 1/2 x 12 1/2 or 9 x 7 or any combination. Fig. Now, let’s take a look at how you can replace your old flex duct with a rigid Oct 14, 2022 · I ended up using rigid ducts but flex ducts can do a good job if installed correctly. This guide will explore the costs associated with rigid and flexible ducts, including initial costs, installation, maintenance, and long-term expenses. Rigid ducting is quieter than its flexible counterpart. A good reason to consider flex duct is that it’s less expensive than rigid sheet metal ductwork. This additional insulation provides greater thermal efficiency to save energy. They can collapse or kink, leading to reduced airflow efficiency. The duct behind the dryer should be no longer than 8 feet, and in-wall ducts should be 35 feet or less. com Aug 14, 2023 · Flexible ducts are more prone to damage from sharp objects or rough handling. g. It is the most durable and efficient option you have because of its toughness. This can eventually lead to more air leaks from the rigid duct. 2mm (18 SWG). 2. Pull it tight. Dec 18, 2010 · Air flow through fully extended flex is comparable to that or rigid duct of the same size, if sized correctly. Support 24/7 [email protected] Sep 3, 2023 · The three main types of ducts are rigid ducts, semi-rigid ducts, and flexible ducts. The duct will be up against the wall on 3 out of 4 sides of the duct (as in - I could have registers on three of its four sides). Apr 28, 2022 · The advantage of using flexible ducts is their ability to bend and be used in tight areas. Flex duct vs Rigid duct. Energy Efficiency Gains. Apr 4, 2024 · Semi-rigid metal (usually aluminum) duct tubing is flexible and similar to foil tubing but quite a bit more rigid. Matt Risinger, Principle of Risinger Homes in Austin TX, is surprised by how few builders use Rigid Metal ducting anymore. Cut the flex duct and rigid duct to the desired length using a utility knife or hacksaw. Click Here For PVC Duct Pipe: 12" 12. Have the same number of passes on each side of the duct to evenly represent all the air in the duct. The “Aluminum Flex 280” is classified as a semi-rigid duct, which means it offers both the flexibility and durability found in flexible hoses and rigid ducting. Each have their place. Carefully insert the end of the flex duct, complete with the attached connector, into the awaiting rigid duct. Apr 27, 2012 · In a hot climate a well installed HVAC system is a must for a new home. Flexible Duct vs Sheet Metal Duct. What Are The Pros And Cons Of Flex Duct Flexible Air Duct. R8 Ducts: Key Differences. That said, it is potentially susceptible to kinks and bends. Rigiflex duct is suitable for all electric and gas clothes dryer installations and is UL certified. Get answers to all your questions about semi-rigid flexible ductwork today! One of the main aspects of duct design is the type that will be used, either flexible or rigid. Metal ductwork is typically more expensive than flex duct, but it is also more durable and long-lasting. A bad rigid install can create an healthy SP drop. Personally, I prefer rigid ducts, but not exclusively. Whether made of rubber, PVC or any other material, all flexible ductwork can bend and flex. flex ducting. Therefore May 13, 2020 · However, EPP rigid ducting should be used in instances where the unit is outside or passes through unheated areas such as loft spaces. There are two broad categories of ductwork: flexible and rigid. Mar 29, 2022 · The Best Duct for Bathroom Exhaust Fans Dundas Jafine Flexible Duct. Although he had intended for this ground-breaking product to act as a heat exchanger Dec 26, 2023 · Flex duct; Rigid duct; Rigid duct connectors; Adhesive; A utility knife; A hacksaw; A drill; A screwdriver; Safety glasses; Work gloves; Steps to connect flex duct to rigid duct. May 29, 2019 · Flex duct or rigid duct can both fail as a duct system if improperly connected or sized incorrectly. Rigid ducts are more efficient than flexible ducts. It can be insulated from the inside or outside. Feb 22, 2012 · Follow me on Instagram - https://www. Rigid duct is the ideal duct for range hoods. Besides the transition hose that connects the machine to the vent, the actual in-wall ducts should be made of rigid, smooth metal. R6 vs. However, each type of duct has its pros and cons. Checkout these Flexible Ducts here Cost of Spiral vs Flexible Duct Flexible & Rigid PVC Pipe Size Table with Dimensions & Pressure Ratings Chart for identification and use classification. Mar 3, 2021 · Flexible or rigid duct are both good for bathroom exhaust fan, but rigid duct is the best as it is more durable and less resistive than flexible duct, which is seven times more resistive than the rigid duct. Thread Tools. Flex ducts do have some constraints and that is where rigid ducts show flexibility. 00 per square foot. Many buildings will use a combination of the two types to suit. It has its seams on the outside, making the inside surface very smooth and having low resistance to airflow. The first cost savings of flexible duct allows contractors and their installers plenty of time to install flexible duct correctly. Jul 19, 2023 · That's 4" flex foil duct, and yes it is flammable. I prefer the rigid main/trunk duct with flex to the duct register boxes. House was built in 76' and had the rigid metal ducts that were very poorly insulated. Semi-rigid duct will be the easiest material to work with. Risinger gives us an in-depth explanation in this video and tells us which variety he prefers. To use flexible ducting in a system, make sure to pull the duct tight so you Aug 12, 2024 · Flex duct versus rigid metal: what should you think about when choosing the right ductwork for your crawl space? There are a few factors to keep in mind: Energy efficiency: Sheet metal ducts are the most efficient, as they have fewer nooks and crannies to trap air. However, it’s important to avoid punctures, kinks, or sags while installing, as these could hurt the performance of the HVAC system. Rigid duct would also work here as it looks like the wall opening is more than 4" above the floor. Rigid Ducts Types of Rigid Ducts. A rigid metal conduit (RMC) is a thick-walled threaded tubing typically made of stainless steel, coated steel, or aluminum Jul 11, 2018 · For contractors looking for R-12 duct warp, Microlite FSK Formaldehyde-free™ duct wrap is the only duct wrap on the market with an installed R-value of R-12 in a single layer. See how Matt and his crew use both Rigid Metal and Flex for great air distribution in the homes they build. I want to replace old exhaust fan and duct work too. Expandable aluminium semi rigid duct comes in many diameter sizes - from Nov 12, 2018 · That duct can either go into attic and then curve back down into ceiling, or it can instead have registers on the side of the wall it is passing through. Mar 26, 2024 · In this comprehensive guide, we will explore the pros and cons of flexible ducts versus rigid ducts, helping you make an informed decision. But I am stuck in this dilemma. instagram. Installation Jan 16, 2016 · All ducts, whether rigid or flexible, should be sealed with UL-181–rated duct mastic. However, choosing an insulated flex duct can also help to increase the Jul 31, 2024 · This guide breaks compares R6 versus R8 ducts, including which to pick to keep your energy bills low. Insulation can make or break your HVAC system’s efficiency and cost-effectiveness. Chris VanRite is doing flex duct, and Robert Bean will cover the no-ducts part (which Oct 12, 2022 · With over 15 years of experience in the HVAC industry, Jason Peavey, owner of PV Heating, Cooling, & Plumbing, shares insider HVAC tips you don't want to miss! Jan 13, 2024 · Sun Tunnel Skylights Flex shaft vs Rigid shaft which one is right for your space Using natural light in your home reduces your energy consumption and lowers the cost of utility bills, and letting natural light in through windows and skylights can improve your overall health as well. Their smooth surfaces and straight design won’t interfere with airflow. I do plan on re-doing my ducting next year, and the plan is to go all rigid, and wrap in mylar padded insulation. Apr 19, 2016 · Flexible ducts cost less. Flexible ductwork is typically the cheaper and quieter option. Overall - I'm very pleased at the cost and ease of Flex Duct. Affordability . com Flex duct is super common in Apr 13, 2021 · How To Replace Flex Duct With Rigid Duct. 1. Construction Materials The air duct is made entirely of aluminum that is twisted to form a continuous airtight lock-seam. Oct 18, 2011 · Contractor thought 1" insulation on original A/C supply ducts looked like sound insulation, but presumably also for anti-sweat. Old ceiling has been removed. Illustration: Air Diffusion Council, “Flexible Duct Performance & Installation Standards,” 5th Edition. The overall discussion is in the following sections. Rigid duct fulfills every requirement proposed by the IRC for range hood Oct 22, 2021 · Semi-rigid ductwork is another type of ducting that is flexible, but more rigid than foil ducting. Aug 7, 2024 · Flexible air ducts are lightweight and ideal for tight spaces. Like foil duct tubing, semi-rigid duct tubing should be used only for the transition ducting running from the dryer outlet to the main duct, and it cannot be concealed in walls or floors. Overall size is 8mm larger than the internal size. At a 4% compression, you loose about 1”-2” of duct diameter going from flexible ductwork to round rigid ductwork. com/r The 4 in. Oct 19, 2012 · To support flex duct properly, use straps that are at least 1. If you are replacing rectangular ducts with round ducts, you will have to determine the equivalent diameter of the round ducts. com. Shop flexible duct and a variety of heating & cooling products online at Lowes. Think of insulation like a cozy blanket for your home’s airways. Use Only What You Need Oct 25, 2023 · With both the flex duct and the rigid duct prepared, it's time to bring them together. Each compression configuration contains data for both board and joist-supported configurations. The photo at right shows such a strap. Anything longer starts to hinder air flow. On the other hand, flexible accordion piping is made of a flexible plastic or foil material that is ribbed or corrugated to allow for bending and shaping. Actually, I'm doing one third of the whole presentation, which is titled Flex Ducts, Hard Ducts and No Ducts: Migration Patterns for Duct Hunters (or not) in the Land of Thermal Comfort. Semi-rigid is accepted under standard building code because it maintains its 4" diameter and has a smooth interior. When ducting is selected and installed correctly, it can improve and prolong the efficiency of the whole system, leading to long term low maintenance. Mar 1, 2022 · The main difference between flexible and metal ductwork is that metal ductwork is rigid, while flexible ductwork can be manipulated. Rigid ducts require periodic inspections and minimal maintenance. Oct 16, 2020 · Building Science Geeks love to hate on flex duct in HVAC systems. True to its name, flex ducts can easily bend around objects and fit into tight spaces. Most newer homes are built with rigid ductwork. 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Flexible duct vs rigid. What Are The Pros And Cons Of Flex Duct Flexible Air Duct.

Flexible duct vs rigid. They return, regulate, supply and exhaust air.