Semi Rigid Duct For Range HoodSemi-rigid ducts are more space efficient. Can I use flex duct for my range hood? (Explained). Semi rigid fully flexible plain-ended duct that holds its shape to improve airflow. See more About this item Semi-rigid duct will not collapse, sag or kink Flame resistant › See more product details Customer ratings by feature. Ducts serving range hoods shall not terminate in an attic or crawl space or areas inside the building. Flexible Semi-Rigid Aluminum Duct w/ Connecting Ends 3060 6" x 8 Ft. Rigid duct is the best type of duct to vent your range hood. Rated 5 out of 5 by Daniel from It was the right length and the right diameter. Which is the best type of duct? (Rigid duct or semi-rigid duct) What is the best material for the range hood ductwork? but with the right tools and knowledge, it’s actually quite simple. Semi-rigid material holds its shape for improved airflow Non-combustible, fire-resistant and corrosion-resistant aluminum construction Easy to install Overview Ideal for general purpose venting applications including bathroom fans and kitchen range hood exhausting Semi-rigid material holds its shape for improved airflow. Semi-rigid duct is more durable than flex duct, but rigid duct is the best for your range hood. Semi-rigid ducts are more space efficient 3. The semi-rigid duct is used for the ductwork of range hood, but according to IRC, its material is not recommended for range hoods duct. Semi-Rigid Aluminum Duct The 6 in. If your blower is pushing 400-500 there is no significant impact to airflow. The reduced size duct on a short run from blower to ceiling probably has a minor impact on airflow. 2K views 1 year ago Vent a hood installation tips brought to you by ventahoodparts. So don't forget to check out whether that manufacturer gives you a warranty or not before deciding to make any purchase. Best 110412 BDB110412 Semi. Kitchen Ventilation Systems. Aluminum is not a material that the IRC has allowed for range hood ducts. Semi-rigid duct is more durable than flex duct, but rigid duct is the best for your range hood. It is better to go with the semi-rigid ducts and, in the least preference, choose flexible ducts of aluminium. Semi-Rigid Flexible Aluminum Duct – Non-Crimped SKU: P-A0xxxx Can be cut to length of specific venting application Suitable for exhaust venting, bathroom venting, range hoods, suspended ceilings and more Be sure to clean ducts over time for optimal appliance performance Semi-rigid air duct will not collapse, sag or bunch up. The general requirements of the International Residential Code (IRC-M1503. Canarm 16 1/2" Variable Speed Upblast Direct Drive Aluminum Exhauster ALX165-UD100EC - 3179 CFM, 1200 RPM, 120. Rigid duct is the most durable and generally made of higher-quality materials compared to flexible duct. New patented duct that combines ease of installation with increased safety. This Semi-Rigid Aluminum Duct is ideal for bathroom fan and kitchen range hood exhausting. Semi-Rigid Flexible Aluminum Duct – Non-Crimped SKU: P-A0xxxx Can be cut to length of specific venting application Suitable for exhaust venting, bathroom venting, range hoods, suspended ceilings and more Be sure to clean ducts over time for optimal appliance performance Semi-rigid air duct will not collapse, sag or bunch up. Semi-rigid duct is more durable than flex duct, but rigid duct is the best for your range hood. The 6 inch semi rigid duct for range hood will have a warranty or guarantee that backs up the product and promises that if you aren't happy with the product, you can return it for another one or get some money back. The International Residential Code (IRC-M1503. Semi rigid duct retains its shape for improved airflow which saves energy Easy to install due to its flexibility Pre-attached metal collars to facilitate easy attachment to dryer and vent Smooth and rigid duct prevents lint buildup Versatile, as duct can be extended to required length for varying installation situations. Semi rigid fully flexible plain-ended duct that holds its shape to improve airflow. This duct is totally noncombustible. Flexible semi-rigid design. Awoco 8 Inches Diameter x 6 Feet Long Semi-Rigid Flexible Aluminum Duct - Ideal for Kitchen, Bathroom, Range Hood Venting (8 Inch) Visit the Awoco Store 51 ratings $2400 Size Name: 8 Inch 8 Inch 8 Inch x 2 About this item [Flexible]- Semi rigid fully flexible plain-ended duct that holds its shape to improve airflow. Rigid duct fulfills every requirement proposed by the IRC for range hood ductwork. com your home for installation parts and kitchenfoundry. It is ideal for general-purpose venting such as range hood and bath fan exhaust. Rigiflex 4-in x 72-in Aluminum Semi-rigid Flexible Duct. To begin venting your range hood. Iskandar BS, Iskandar J, Partasasmita R, Alfian RL. It has a maximum operating temperature of 435°F. Rigid duct is the best type of duct to vent your range hood. This study was performed to evaluate the health information system regarding the dengue surveillance system in Indonesia. Dundas Jafine 8" x 8' Semi-Rigid Aluminum Duct Everyday Low Price $22. 6 Inch Semi Rigid Duct For Range Hood in 2023, Tested …. Rigiflex 4-in x 72-in Aluminum Semi-rigid Flexible Duct Model # L326ULC Find My Store for pricing and availability 67 IMPERIAL 6-in x 96-in Aluminum Semi-rigid Flexible Duct Model # FXL0003-B Find My Store for pricing and availability 43 Lambro 3-in x 96-in Aluminum Semi-rigid Flexible Duct Model # L301 Find My Store for pricing and availability 43. Semi-Rigid Color Silver HVAC Product Type Air Duct General Material Aluminum Product Width (in. 2) for range hoods are: •• Must discharge to the outdoors (not terminate in attic). Awoco 8 Inches Diameter x 8 Feet Long Semi-Rigid Flexible Aluminum Duct - Ideal for Kitchen, Bathroom, Range Hood Venting (8 Inch x 1) Brand: Awoco 3. Heating & Cooling /HVAC Duct & Fittings /Flexible Duct 13 products in 8 Inch | Flexible Duct Popular Filters Insulated Diameter (Inches): 4 Diameter (Inches): 6 Flexible Diameter (Inches): 8 Semi-rigid Sort & Filter (1) Sort & Filter (1) Sort By Featured Best Sellers Highest Rated New Arrivals Color/Finish Family Blue (3) Silver (3) Yellow (3). Rigid ducts are generally made from stainless steel whereas semi-rigid or flexible ducts are made using plastic or aluminum. The basic components of venting a range hood include a duct, an elbow piece, and either horizontal or vertical exhaust. Can I use a flexible duct for my range hood?. Deflecto Semi Rigid Aluminum Duct, Non-Crimped, Silver, 6” x 8’ (A068/4-A) Visit the Deflecto Store 674 ratings $2818 About this item Semi rigid aluminum duct has a 6” diameter and 8’ length Perfect for multiple air control applications, including bathroom and kitchen venting. Canarm 15" Variable Speed Upblast Direct Drive Aluminum Exhauster ALX150-UD075EC - 2353 CFM, 1550 RPM, 120/240V, 1 Phase. 1M views 10 years ago Self help video on ducting your Vent a hood kitchen. Explain to them what the duct is for so they can make a duct to suit the application. Duct will not support combustion Constructed with a high density, corrosion. 29 each ADD TO CART In Stock Get. The breadth of our products and the experience of your local Greenheck representative offers you superior and reliable air movement. Flexible Semi-Rigid duct expands to 8' long for clothes dryer, bathroom, kitchen or attic venting case dimensions: 28. The semi-rigid duct is used for the ductwork of range hood, but according to IRC, its material is not recommended for range hoods duct. Ideal for bathroom fan and kitchen range hood exhaust venting Semi-rigid material holds its shape for improved airflow Non-combustible, fire-resistant and corrosion-resistant aluminum construction 7 in. If your range hoods use a rectangular duct such as a 3. Provide superior performance when it comes to airflow 4. Finally, install the hood. Rigid duct fulfills every requirement proposed by the IRC for range hood ductwork. This duct is totally noncombustible. What are the code requirements for a range hood duct?">What are the code requirements for a range hood duct?. This Semi-Rigid Aluminum Duct is ideal for bathroom fan and kitchen range hood exhausting. Rigid duct is the best type of duct to vent your range hood. This Semi-Rigid Aluminum Duct is ideal for bathroom fan and kitchen range hood exhausting. I used it for hooking up a stovetop Range Hood ve It was the right Duct For Range Hood Venting?">What Is The Best Type Of Duct For Range Hood Venting?. 00 after $25 OFF your total qualifying purchase upon opening a new card. Rigiflex 4-in x 72-in Aluminum Semi-rigid Flexible Duct Model # L326ULC Find My Store for pricing and availability 67 IMPERIAL 6-in x 96-in Aluminum Semi-rigid Flexible Duct Model # FXL0003-B Find My Store for pricing and availability 43 Lambro 3-in x 96-in Aluminum Semi-rigid Flexible Duct Model # L301 Find My Store for pricing and availability 43. One major advantage of using semi-rigid ducts is that they are more space efficient than traditional rigid duct systems. Dryer Vent For the Range Hood. What Type of Duct / Vent Is Best for Venting a Range Hood. Installation clamps sold separately. Unlike plastic and aluminum, steel ductwork is far easier to maintain. A semi-rigid duct offers more durability than a flexible duct. Do range hoods have to be vented outside?. HVAC Ducts & Venting Supplies Flexible Semi-Rigid Duct 8" x 8 Ft. This new patented duct combines strength and flexibility for easy and. Semi-Rigid Aluminum Duct is noninsulated. It requires 2 people with 2 hands grabbing more edge area to fully expand the duct. For more information on choosing the right type of duct for your range hood, check out this article. Planting coffee and take care of forest: A case study on coffee cultivation in the forest carried out among people of. Then you'd use a 45 to turn down vertical directly over the vent hood. Awoco 8 Inches Diameter x 6 Feet Long Semi-Rigid Flexible Aluminum Duct - Ideal for Kitchen, Bathroom, Range Hood Venting (8 Inch) 4. 8-in x 300-in Insulated Polyester Flexible Duct R 6. Semi-Rigid Aluminum Duct is ideal for bathroom fan and kitchen range hood exhausting. It is ideal for general-purpose venting such as range hood and bath fan exhaust. 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Lambro Industries 308 7-Inch x 8-Foot Aluminum Semi-Rigid Duct Visit the Broan-NuTone Store 337 ratings $2815 Available at a lower price from other sellers that may not offer free Prime shipping. Depending on its durability and functionality, it can be positioned between rigid and flexible ducts. Maximum operating temperature of 435°F. Semi rigid duct retains its shape for improved airflow which saves energy Easy to install due to its flexibility Pre-attached metal collars to facilitate easy attachment to dryer and vent Smooth and rigid duct prevents lint buildup Versatile, as duct can be extended to required length for varying installation situations. Rigid duct is higher quality than flex duct and is made of much more durable materials. Semi-rigid ducts are designed with flexible yet durable aluminum material, making them much smaller in size than standard rigid systems. Fabric Ductwork & Fabric Ducting Systems. Lambro Industries 306 Aluminum Duct, 6 in x 8 ft. Flexible Semi-Rigid Aluminum Duct Brand: Lambro Industries SKU: 310-LAMBRO ( 10) Q&A: ( 0) – + $24. Semi-rigid ducts are more space efficient. It should also NEVER contact anything flammable - including the. 1) states "the duct serving the hood shall have a smooth interior surface. Ideal for bathroom fan and kitchen range hood exhaust venting Semi-rigid material holds its shape for improved airflow Non-combustible, fire-resistant and corrosion-resistant aluminum construction 7 in. Duct has a 6-in diameter and extends to 8-ft in length Flexible semi-rigid design Flame resistant material Installation clamps sold separately Warranty Guide PDF Installation Manual PDF Specifications Reviews Community Q & A. Ideal for general purpose venting applications including bathroom fans and kitchen range hood exhausting. It requires a one-time installation and little to no maintenance as long as you clean your range hood. Apply for a Home Depot Consumer Card Smooth duct designed to prevent lint buildup Aluminum construction ensures durability. Ducting & Venting Flexible Ductwork Everbilt 7 in. UL 181 air connector duct. Dundas Jafine 3" x 8' Semi. If it is well over 600cfm your duct is too small. com">8 Inch Flexible Duct at Lowes. An example of how not to do it is shown above. Ideal for bathroom fan and kitchen range hood exhaust venting Semi-rigid material holds its shape for improved airflow Non-combustible, fire-resistant and corrosion-resistant aluminum construction 7 in. ” Both flexible and semi-rigid ducts have a. Semi-rigid ducts are more space efficient. Most rigid ductwork is made from durable stainless steel. Non insulated general purpose venting duct for low & medium operating pressures is ideal for kitchen, bathroom, and range hood venting. Duct has a 6-in diameter and extends to 8-ft in length. Semi Rigid Duct HP Expand Duct (55) Questions & Answers (2) Hover Image to Zoom $ 28 00 Pay $3. can i use semi rigid duct for my range hood exhaust?. Technical Specifications Installation Instructions Brand Name: Dundas Jafine Features Aluminum is flexible to allow for ease of installation. com">Ducting Do's and Dont's for Vent A Hoods. It has a maximum operating temperature of 435 degree F. Semi-Rigid Flexible Aluminum Duct – Non-Crimped SKU: P-A0xxxx Can be cut to length of specific venting application Suitable for exhaust venting, bathroom venting, range hoods, suspended ceilings and more Be sure to clean ducts over time for optimal appliance performance Semi-rigid air duct will not collapse, sag or bunch up. Product information Technical Details Additional Information Warranty & Support. 4 Insulated No Maximum air flow (CFM) 0 Length 8 ft. Awoco 8 Inches Diameter x 6 Feet Long Semi-Rigid Flexible Aluminum Duct - Ideal for Kitchen, Bathroom, Range Hood Venting (8 Inch) Visit the Awoco Store 51 ratings $2400 Size Name: 8 Inch 8 Inch 8 Inch x 2 About this item [Flexible]- Semi rigid fully flexible plain-ended duct that holds its shape to improve airflow. The duct serving the hood shall have a smooth interior surface, shall be air tight, shall be equipped with a back-draft damper, and shall be independent of all other exhaust. Rigid duct fulfills every requirement proposed by the IRC for range hood ductwork. Halifax FTHP630 Type 1 Concession Trailer / Food Truck Hood System - 6' x 30". However, the best ducting for your kitchen hood is rigid. New Kitchen Venting (DIY). Attach the transition duct to the hood and make sure the damper flap operates freely. Going backwards from wall cap, you'd use a 90 between the joists, with the inlet pointing down and to the left (so 45 degrees off plumb), lined up with the vent hood as far as the distance off the wall. Benefits of Using Semi-rigid flexible Ducts for your range hood exhaust 1. Some people use them for their dryers, but this is also against the IRC regulations. The 6 in. A range hood should last you 10+ years with minimal repairs or issues. Made with noncombustible corrugated aluminum continuous lock seams to keep the duct in place which allows for easy installation. What are the code requirements for a range hood duct?. Semi Rigid HP Expand Duct. Flexible Semi-Rigid Aluminum Duct w/ Connecting Ends SKU: 3060 Lambro Industries SKU : 3060. Additionally, semi-rigid ducting is made of aluminum. This study aims to analyze the changes in paddy management system in Sindang Hamlet due to green revolution and climate change, using qualitative data collection methods. The basic components of venting a range hood include a duct, an elbow piece, and either horizontal or vertical exhaust. Changes in paddy field management in Sindang Hamlet …. The semi-rigid duct is a combination of aluminum. Semi Rigid HP Expand Duct (93) Questions & Answers. Awoco 8 Inches Diameter x 6 Feet Long Semi. Builder's Best 110412 BDB110412 Semi. What about using semi-rigid 6" flex duct starting in the ceiling and just bending it slightly to give me that 1/2" clearance as it travels to the 6" opening on my 550CFM range hood. They are more affordable Disadvantages of using semi-rigid aluminum duct to your kitchen hood 1. This duct is totally noncombustible. The 10 in. A duct for a range hood should be smooth, solid, and double-walled. The semi-rigid aluminum duct is ideal for applications where code requires an all aluminum product. This duct is totally non combustible with a maximum operating temperature of 435°F. 0:00 / 10:12 Ducting Do's and Dont's for Vent A Hoods - Kitchenfoundry. Rigid duct is the most durable and generally made of higher-quality materials. Semi rigid ducts are lightweight 5. Since 1975 Greenheck has manufactured quality kitchen ventilation components and systems for restaurants and commercial kitchens. What Is The Best Type Of Duct For Range Hood Venting?. Screw the ductwork together with 1/4-in. A semi-rigid duct offers more durability than a flexible duct. Model # FX42CULXZW Store SKU # 1001047918. It requires a one-time installation and little to no maintenance as long as you clean your range hood filters. Rigiflex 4-in x 72-in Aluminum Semi-rigid Flexible Duct. com your home for appliances that elevate. Most rigid ductwork is made from durable stainless steel, as opposed to rigid ductwork which is aluminum or flimsy plastic. 99 11% Mail-In Rebate Good Through 5/14/23 $2. Lambro Industries 308 7-Inch x 8-Foot Aluminum Semi-Rigid Duct Visit the Broan-NuTone Store 337 ratings $2815 Available at a lower price from other sellers that may not offer free Prime shipping. Awoco 8 Inches Diameter x 6 Feet Long Semi-Rigid Flexible Aluminum Duct - Ideal for Kitchen, Bathroom, Range Hood Venting (8 Inch) Visit the Awoco Store 51 ratings $2400 Size Name: 8 Inch 8 Inch 8 Inch x 2 About this item [Flexible]- Semi rigid fully flexible plain-ended duct that holds its shape to improve airflow. com: Builder's Best 110412 BDB110412 Semi …. Semi-rigid material holds its shape for improved airflow Non-combustible, fire-resistant and corrosion-resistant aluminum construction Easy to install Overview Ideal for general purpose venting applications including bathroom fans and kitchen range hood exhausting Semi-rigid material holds its shape for improved airflow. 1) states “the duct serving the hood shall have a smooth interior surface. New patented duct that combines ease of installation with increased safety UL 181 air connector duct. Rigiflex 4-in x 72-in Aluminum Semi-rigid Flexible Duct Model # L326ULC Find My Store for pricing and availability 67 IMPERIAL 6-in x 96-in Aluminum Semi-rigid Flexible Duct Model # FXL0003-B Find My Store for pricing and availability 43 Lambro 3-in x 96-in Aluminum Semi-rigid Flexible Duct Model # L301 Find My Store for pricing and availability 43. DuctSox® air dispersion products are an innovative and cost effective fabric alternative to traditional metal ductwork providing precise and efficient heating, cooling, or ventilating for virtually any building application. However, make sure you do not use plastic ducts and composite hoses. The standard versions are constructed of non combustible aluminum and come in sizes ranging from 3 to 6 inches. Deflecto Semi Rigid Aluminum Duct, Non-Crimped, Silver, 6” x 8’ (A068/4-A) Visit the Deflecto Store 674 ratings $2818 About this item Semi rigid aluminum duct has a 6” diameter and 8’ length Perfect for multiple air control applications, including bathroom and kitchen venting. Dia flexible duct extends up to 8 ft. Awoco 8 Inches Diameter x 6 Feet Long Semi-Rigid Flexible Aluminum Duct - Ideal for Kitchen, Bathroom, Range Hood Venting (8 Inch) Visit the Awoco Store 51. 0:00 / 10:12 Ducting Do's and Dont's for Vent A Hoods - Kitchenfoundry. can i use semi rigid duct for my range hood exhaust? because. It has a smooth surface and comes in either stainless or galvanized steel,. Aluminum is flexible to allow for ease of installation. New patented duct that combines ease of installation with increased safety UL 181 air connector duct. Ducts serving range hoods shall not terminate in an attic or crawl space or areas inside the building. Aluminum is flexible to allow for ease of installation; All aluminum products are fire resistant; Semi-rigid product holds its shape to help improve airflow. Semi-rigid material holds its shape for improved airflow. Flexible aluminum semi-rigid duct is ideal for bathroom fan and kitchen range hood exhaust applications. Overview Model # MFX68XZW Store SKU # 1000502334 Dundas Jafine is proud of offer a comprehensive range of all aluminum semi rigid ducts to meet any installation need. Semi-rigid material holds its shape for improved airflow. Ducting Dos and Dont's Part 2 Kitchenfoundry. 2K views 1 year ago Vent a hood installation tips brought to you by ventahoodparts. com/p/Everbilt-6-in-x-8-ft-Semi-Rigid-Flexible-Aluminum-Duct-MFX68XHD/203626515#Overview" h="ID=SERP,5728. 2 (51) $2400 $14 delivery Mar 27 - 30 VIVOSUN 8 Inch 25 Feet Non-Insulated Flex Air Aluminum Ducting Dryer Vent Hose for HVAC Ventilation w/Two 8 Inch Stainless Steel Clamps 4. Semi-rigid ducting is commonly used for bathroom vents and general exhaust vents. Semi Rigid Duct HP Expand Duct. The duct serving the hood shall have a smooth interior surface, shall be air tight, shall be equipped with a back-draft damper, and shall be independent of all other exhaust systems. Flexible Aluminum Dryer Vent …. Revealing the charge carrier kinetics in perovskite solar …. Rigiflex 4-in x 72-in Aluminum Semi-rigid Flexible Duct Model # L326ULC Find My Store for pricing and availability 67 IMPERIAL 6-in x 96-in Aluminum Semi-rigid Flexible Duct. Rigid duct is without a doubt the best option for venting your range hood. 6 Inch Semi Rigid Duct For Range Hood in 2023, Tested In Our Lab. If it is pushing 600 or more there will be a bit of extra noise. Screw the ductwork together with 1/4-in. What about using semi-rigid 6" flex duct starting in the ceiling and just bending it slightly to give me that 1/2" clearance as it travels to the 6" opening on my 550CFM range hood. Deflecto Semi Rigid Aluminum Duct, Non. This new patented duct combines strength and flexibility for easy and safe installation. One major advantage of using semi-rigid ducts is that they are more space efficient than traditional rigid duct systems. Ducting & Venting Flexible Ductwork Everbilt 7 in. Unlike plastic and aluminum, steel ductwork is far easier to maintain. Deflecto Semi Rigid Aluminum Duct, Non-Crimped, Silver, 6” x 8’ (A068/4-A) Visit the Deflecto Store 674 ratings $2818 About this item Semi rigid aluminum duct has a 6” diameter and 8’ length Perfect for multiple air control applications, including bathroom and kitchen venting. Semi-Rigid Color Silver HVAC Product Type Air Duct General Material Aluminum Product Width (in. 4 Material Aluminum Pack Size 1 Product Length (in. Duct has a 6-in diameter and extends to 8-ft in length. Semi-Rigid Aluminum Duct is noninsulated. •• Constructed of galvanized steel, stainless steel, or copper. Heating & Cooling /HVAC Duct & Fittings /Flexible Duct 13 products in 8 Inch | Flexible Duct Popular Filters Insulated Diameter (Inches): 4 Diameter (Inches): 6 Flexible Diameter (Inches): 8 Semi-rigid Sort & Filter (1) Sort & Filter (1) Sort By Featured Best Sellers Highest Rated New Arrivals Color/Finish Family Blue (3) Silver (3) Yellow (3). 29 each ADD TO CART In Stock Get 38 Wed, May 10 More Available Inventory Details Order by today, receive Wednesday Free Shipping On orders over $99. Rigid ducts are generally made from stainless steel whereas semi-rigid or flexible ducts are made using plastic or aluminum. It requires a one-time installation and little to no maintenance as long as. This particular duct is UL2158A listed and marked and can be used in applications where the dryer. 47 Size name: 8 Inch x 1 Enhance your purchase [Flexible]- Semi rigid fully flexible plain-ended duct that holds its shape to improve airflow. What Type of Duct is Best for Venting a Range Hood?. However, the best ducting for your kitchen hood is rigid. Rigid duct is without a doubt the best option for venting your range hood. The 6 inch semi rigid duct for range hood will have a warranty or guarantee that backs up the product and promises that if you aren't happy with the. Ideal for general purpose venting applications including bathroom fans and kitchen range hood exhausting. Subscribe 6. It has a smooth surface and comes in either stainless or galvanized steel, which are the best materials for this job. – jcwkjw20170 Feb 24, 2021 at 11:25. All aluminum products are fire resistant. How can I offset 6" ducting by just a few inches?. The semi-rigid duct is used for the ductwork of range hood, but according to IRC, its material is not recommended for range hoods duct. [Perfect For Awoco Range Hoods]- Fit Awoco 8” top vent range hoods perfectly. in length Easy to install Class 0 semi-rigid aluminum duct Maximum operating temperature of 435°F. sheet metal screws and seal the seams with aluminum-faced duct tape (not regular, cloth-backed duct tape). A semi-rigid duct offers more durability than a flexible duct. To begin venting your range hood, you’ll need to determine the size of the exhaust duct required for your particular model. [General Purpose Venting]- Non insulated general purpose venting duct for low & medium operating pressures is ideal for kitchen, bathroom, and range hood venting. It has a maximum operating temperature of 430 Degree F. Depending on its durability and functionality, it can be positioned between rigid and flexible ducts. Non-combustible, fire-resistant and corrosion-resistant aluminum construction. Semi-Rigid Aluminum Duct is ideal for bathroom fan and kitchen range hood exhausting. This new patented duct combines strength and flexibility for easy and safe installation. It’s the most durable option because higher quality materials are used to produce them. 25 X 14"and not a round duct, I would go to a duct fabricator or HVAC shop and have them make a duct exactly as what you need. Share Improve this answer Follow answered May 31, 2021 at. HVAC Ducts & Venting Supplies Flexible Semi-Rigid Duct 8" x 8 Ft. Smooth duct designed to prevent lint.