If this is an issue for the layout of your home, then you might want to consider a ductless kitchen hood instead. One-source solutions are available to existing Home Depot Pro customers. Your range hood should always be vented outside with no exceptions. Such cases are rare and homeowners generally prefer expanding the size of their ducts instead of trimming them. The same goes for elbows used in the duct. Why will rigid not work? You must be a magazine subscriber to access this feature. If you absolutely have to use it, I'd use rigid duct as much as possible, and only use the minimum amount of flex duct in the areas you specifically need it. Duct transitions are important because a duct thats too small reduces the efficiency of your hood. Your ductwork should have no more than three elbows. No. Ensure youre going for the right material, size, and design before you finalize the investment. Although rigid ductwork might cost more than flexible and semi-rigid ducts, its an investment that will serve you for at least a decade or two under timely maintenance. So, you dont want to vent it into the attic or anywhere else other than outside of your home. Here is a table to give you an idea of the ideal duct size in relation to CFM: Once you have the size figured out, the next measurement is the length of the duct. Lastly, the duct should be facing upwards at the start of the hood. Estimated Delivery : Monday 01 August - Friday 05 August. Contact UsPrivacy and Security Statement. The venting will also depend on the style and location of your hood. The latter provides better angles of airflow and also has decreased chances of air colliding with the duct. Like this one: https://www.homedepot.com/p/Everbilt-6-in-x-8-ft-Semi-Rigid-Aluminum-Duct-A068-4-AHD/205046831#overlay. 2022 The Taunton Press, Inc. All rights reserved. Dynamic: Rigid duct is the ideal duct for range hoods. Some transitions are duct reducers. For instance, range hoods with a CFM of 400 need around 4 inches of duct for air to pass through freely. The material is strong enough to withstand the harshness of different weather conditions without needing repairs every once in a while. SIGN UP FOR UPDATES ON CURRENT & UPCOMING AWOCO PRODUCTS! To sum it up, rectangular ducts are fine to use but if youre looking for maximum efficiency, circular ducts are the way to go. A well-done installation will be worth it in the long run, as you wont have to worry about your range hood duct at all. That is why in this read, youll be learning about the several options you have for ductwork and which material is best for the job. In this case, hiring an HVAC contractor or plumber to handle the job will ensure that your ducting works as hard for you as it possibly can. For example, if you have an existing 4 duct, you can use a duct transition to increase its size to 6. When I did my own hood install as part of a recent renovation project (I converted from one of the recirculating type hoods, which I don't like), I reframed part of the wall to allow me to run rectangular duct up between the studs into an attic space. I kept the run as straight as possible, and used rigid ducting the entire way, with just an adjustable angle fitting to make up for some misalignment between the stud wall and the rafters. We recommend a minimum duct size of 6 for 600 CFM hoods, 8 for 900 CFM hoods, and 10 for 1200 CFM range hoods. However, rigid ducts will remain intact. Unfortunately, flexible duct does not come anywhere close to rigid duct in terms of performance and its a risky pick. I'm not a current Home Depot Pro customer, but I am ready to buy today. /each. Available stock is reserved in someone's cart. I was thinking about something like this: https://www.mcmaster.com/smooth-bore-duct/heat-reflective-duct-hose-for-air/, A collection of one thousand construction details organized by climate and house part. What are my options? Flexible duct is a poor investment because it is: Yes, but duct size depends on the CFM of your range hood. Best Real Wood Ceiling Fans For Indoors & Outdoors (Damp Rated), 10 Best Radon Detectors & Test Kits Review. This duct is totally noncombustible. It requires a one-time installation and little to no maintenance as long as you clean your range hood filters. Can I use flexible duct for my range hood? Even if you seldomly cook, the safe, cost-effective bet is to go with rigid ductwork. The more powerful the range hood, the bigger ductwork would be needed. Item #: The more powerful the hood, the larger the duct size youll need. You should not cut down the size of the duct unless theres an absolute necessity. Accelerate your business's options and take it the next level when you open a credit line with Home Depot Pro. It reduces the noise of a blower inside the ductwork and allows less air to escape the duct. The simplest answer to your question is this if you are in a residential setting, then the trade most likely to install rigid duct-to-vent kitchen hoods is an HVAC contractor or a plumber. Be sure to clean ducts over time for optimal appliance performance, Can be cut to length of specific venting application, Semi-rigid air duct will not collapse, sag or bunch up, Suitable for exhaust venting, bathroom venting, range hoods, suspended ceilings and more. Learn more about laminar flow in this complete article. Further, make sure that you allow 18 of space between elbows to keep the amount of resistance manageable. What type of duct is best for venting a range hood? 30 Days Easy Return. Bigger ducts help in the circulation of air. The semi-rigid transition duct is fire-resistant and won't collapse, sag or bunch up. This helps polluted warm air rise from the base and get shifted outdoors through the vent. This maximizes the efficiency of airflow, creating a path of least resistance. 2019 Deflecto, LLC. Copyright 2022 Proline Range Hoods. This won't delete the articles you've saved, just the list. As a homeowner, you sometimes have to decide whether you want to use metal or plastic fan blades. $33.00. Press J to jump to the feed. Press question mark to learn the rest of the keyboard shortcuts. This list updates each time you open it based on the criteria selected. When you are in the process of either building a new house or renovating your existing home, the insulation material for your home is a very important aspect to discuss with the building contractors. Airflow Academy is a blog where our team members share tips and posts on the topic of home ventilation. While installing rigid ducting to vent your kitchen hood is technically a job you could DIY, it is always wise to enlist the proper trade. Please Log In to use this helpful feature. 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Unlike plastic and aluminum, steel ductwork is far easier to maintain. Get the professional answers you deserve. According to the code, ductwork must have a rigid inner build. With the right sized duct, youll maintain laminar flow or the smooth flow of air through your duct. Call 1-866-412-6726 or email us to set your web login up for your existing account. You want your ducting to work efficiently and air will flow quicker and easier with a straight path. Can I install a ductless range hood outside. If you have any questions about ductwork, duct size, or anything else range hood related, call our customer support team at (877) 901-5530. Typically, PVC ducts are flexible and made from a material that is vulnerable to the wear and tear that ductwork normally goes through. The elbows that you do have should be spaced at least 18 inches apart. We work hard to ensure you're satisfied with our products. Your kitchen hood should last at least ten years and in that time it should require minimal repairs as there shouldnt be too many issues. x 8 ft. Semi-Rigid Flexible Aluminum Duct, Aluminum is flexible to allow for ease of installation, Semi-rigid product holds its shape to help improve airflow, 6 in. Other than the basic safety reasons, a flexible duct is extremely difficult to maintain and clean. It is best to move it entirely out of your home. Some of these conditions include the PVC duct being solvent cemented and installed under a concrete slab. Its imperative that you vent your hood to the exterior of your home, not into the attic, into walls, or between floors. That's not "smooth wall" as far as ducts go, it's a flex duct. Flexible duct for range hood is not allowed by the IRC (International Resident Code) for good reasons. yeah just tries semi piece of crap aluminum foil.. hahah yeah im going to go buy some 90degree regid duct tomorrow thanks. Static: You dont want to take the risk either because if things go south, theres a high probability that your insurance wont cover the loss either since you violated the residential code. Combine that with the toxic airborne waste that is disposed of from the kitchen, the flexible duct will not be able to withstand this much dirtiness in the long term. This is because rectangular ducts have corners and edges where dust and grease are set up easily. Much like the reason for the prohibition of flexible duct, plastic PVC duct is not allowed to be used under most local codes. It will allow the range hood as a whole to run more efficiently. M1503.2 Duct material. Create an account to follow your favorite communities and start taking part in conversations. For example, if your hood is wall or under cabinet mounted then it can be vented either vertically or horizontally. Single-wall ducts serving range hoods shall be constructed of galvanized steel, stainless steel or copper. link to Metal vs Plastic Fan Blades: Which Is Better? The 6 in. Flexible ducts are not appropriate for kitchen hoods. This means that, at zero cost to you, I will earn an affiliate commission if you click through the link and finalize a purchase. This feature has been temporarily disabled during the beta site preview. Range Hoods. If you vent your hood into the attic, the buildup of dirt and chemicals can be dangerous to your health and is harmful to your home as well. Its more important to ensure you use an appropriately sized duct. Note also that the rough surface of the flex duct is more prone to accumulating oil and dirt from a range hood, and will also be more difficult to clean. You could use that stuff, it's just not ideal. of diameter and stretches to 8 ft. L. I havent seen Rigid duct specifically mentioned. So, the bottom line is that this isnt the best option in the market either. Failure to adhere to this advice will result in back-drafting, which is when the air is pulled back into the kitchen from the hood. On the contrary, round ducts have no corners so dirt settles at the lowest point in a straight line making it easier to clean. Some of the other options that you have are flexible duct, rectangular duct, semi-rigid duct, and PVC duct. Most range hoods will require between 6 and 8 duct, while more powerful outdoor or professional range hoods may require 10 duct or larger. These arent necessary, though. Vents have the purpose of directing polluted air from the kitchen to the outdoors. Perhaps you have to decide on the type of blades to replace old existing blades in the HVAC system, R19 vs R21 Insulation: Which One To Choose? Is Master Flow insulated ductwork good for kitchen hood exhaust? our full article on range hood duct sizing here, Outdoor Range Hood Buyers Guide (7 Things to Consider).