Which is better rigid or flexible duct for range hood?
Semi-rigid duct is more durable than flex duct, but rigid duct is the best for your range hood. Rigid duct is the most durable and generally made of higher-quality materials compared to flexible duct. Can flexible duct be used for a range hood?
What material is used for range hoods?
Ducts serving range hoods shall not terminate in an attic or crawl space or areas inside the building. M1503.2 Duct material. Single-wall ducts serving range hoods shall be constructed of galvanized steel, stainless steel or copper.
What is the Flex on this hood for?
It’s for a micro wave range hood combo if that means anything. They put in new cabinets and it looks like they’re preparing to use flex through the upper cabinet to the existing rigid in the attic.
What is the proper venting for a range hood?
A duct for a range hood should be smooth, solid, and double-walled. Like a stove chimney. It should also NEVER contact anything flammable - including the cabinet shelves. And the vent shuld project substantially above the roof.
What pipe should I use for a range hood?
Don't ever use 4" ducting or any plastic ducting on a range hood installation. Per most manufacturers the minimum size duct allowed for range hoods is 3 ¼" by 10" which is equivalent to 6" round. Larger and hoods with higher CFM's (cubic feet per minute) require even larger duct sizes up to 10"and 12” round.
Can flex duct be used for exhaust?
Flexi duct is a versatile and effective ducting that is appropriate for use in many ventilation and exhaust systems, and it comes in many variations, each with its own attributes.
Can semi rigid duct be used for range hood?
You can choose from a flexible duct, semi-rigid duct, or rigid duct. Flexible ducts are not appropriate for kitchen hoods.
Can I use PVC pipe for range hood?
PVC pipe is not allowed to be used for a range hood unless when the case falls within the exceptions stipulated by the International Residential Code, which permits the use of schedule 40 PVC pipe. Even in these cases, there are many rules and regulations to adhere to regarding the duct's installation and location.
Can I use 4 inch duct for range hood?
What is the minimum duct size for a range hood? The minimum duct size for a range hood is 4”, which is ideal for range hoods 400 CFM and under. The higher the cubic feet per minute, the larger the duct you'll need. At 600 CFM, the minimum duct size is 6”.
Can you use plastic ducting for cooker hood?
PVC ducting is the cheapest one available, but is highly versatile and can be used in the majority of general ventilation connection applications, including cooker hoods.
What is code for a range hood?
Although the international CFM code for range hoods is 100CFM, some local authorities allow for range hoods with slightly lower or higher CFM than this, depending on the type of your cooking, and the square footage of your cooktop.
Is flexible ductwork vs rigid ductwork?
Flex ducts are better for existing trunk-and-branch heating and cooling systems. This is because they're more versatile and flexible. Metal ducts are more rigid due to the nature of steel, making them ideal to build an entire HVAC system.
How do you connect a vent to a flex duct?
0:393:32How-To Connect Flex Duct to a Collar - The Duct Shop - YouTubeYouTubeStart of suggested clipEnd of suggested clipTake the black side of the band your gun to the neck of the duct. And this is going to ratchet tieMoreTake the black side of the band your gun to the neck of the duct. And this is going to ratchet tie it and then clip it once it's tightened.
Is 400 CFM enough for range hood?
To power your range hood, you need at least 100 CFM for every 10,000 BTUs of your stovetop. For example, a 100,000 BTU stove needs at least a 1000 CFM range hood. For electric stoves, multiply the stove width by 10. So, for a 42” electric stove you want a range hood with at least 420 CFM.
Can I use rectangular duct for range hood?
Most hood exhaust systems will work more efficiently with a round duct system, however if you are running an older system then a rectangular system may be required. However in the end most kitchen spaces will benefit greatly from going with the round ducts.
How much CFM can a duct handle?
The smallest 6×4 ducts can handle 60 CFM airflow....CFM Sizing Chart For Metal Round Ducts (50-2,000 CFM)Duct Size (Inches)Metal Duct Airflow (CFM)12 inches525 CFM14 inches750 CFM16 inches1,200 CFM18 inches1,500 CFM7 more rows
How do you connect a vent to a flex duct?
0:393:32How-To Connect Flex Duct to a Collar - The Duct Shop - YouTubeYouTubeStart of suggested clipEnd of suggested clipTake the black side of the band your gun to the neck of the duct. And this is going to ratchet tieMoreTake the black side of the band your gun to the neck of the duct. And this is going to ratchet tie it and then clip it once it's tightened.
Is flexible ductwork vs rigid ductwork?
Flex ducts are better for existing trunk-and-branch heating and cooling systems. This is because they're more versatile and flexible. Metal ducts are more rigid due to the nature of steel, making them ideal to build an entire HVAC system.
Do I need insulated duct for range hood?
You can insulate your vent hood duct, but it's not required. Insulating your vent hood duct will keep the noise down and keep your greasy kitchen air from escaping into your joists and attic.
Can you use dryer vent duct for bathroom fan?
A bathroom fan and a dryer should never share the same vent. International building code states that dryer vent exhaust systems must be separate from all other systems and must expel moisture out of the house through a dedicated vent. This is because of the potential hazards associated with improper dryer venting.
Can access panels be worked around?
As far as access panels, I can only say that my contractor says it's far preferable--he's putting them in for me--but it it can be worked around if they're not there.
Can you vent straight out of the wall?
The cabinet maker should have created an access panel since you were venting out the wall. It would have made things a lot easier. If you were venting straight up, you would have access from the attic and be able to attach a piece of rigid ducting to the vent and raise it straight up into position and make the final connections in the attic. Venting straight out the wall is harder on the HVAC person, but the attachment can be done with the asphalt based mastic instead of metal tape. You have to have patience, and it'll be stinky for a good while, but it's doable. Is this person a professional HVAC person? If not, that's where I'd start----after this guy refunded your money.
Why is hard pipe better than soft pipe?
Hard pipe is recommended because it will work much better and is unlikely to be crushed or compromised.
Is flexible ducting better than smooth walled ducting?
Flexible ducting has a drawback that it will accumulate grease in a greater amount and shorter timeframe than smooth walled rigid ducting. All those little ridges are places grease will adhere to, which increases the risk of a bad fire in case you ever get anything going up there (which, in a typical residential application might be slim chance).
