Kitchen Hood Exhaust Duct Size

If your conditioned air whether heated or cooled is getting pulled out of your facilities at a rate of 2000 cfm or greater it will cost you allot more money in the long run than the initial cost of a mua fan.

Kitchen hood exhaust duct size. The general size and rule of thumb for mua is a 6 hood or larger or 2000 cfm or more of exhaust flow. Mechanical ventilation systems commercial kitchen exhaust clause 3 8 protected shafts scdf restaurant grease and heat hood sizing. I m putting in a kitchen exhaust hood that is 480 cfm with a 6 round duct connection. My duct sizer tells me that would require a 10 5 duct.

View the kitchen exhaust duct sizing chart below to determine your ductwork diameter based on range hood cfm. Some applications have a constant aerosol generation rate that. I ve never designed a kitchen exhaust system before but my understanding was that for bathroom exhaust you want to size the duct for 0 1 of head loss. 16 gage or stainless steel not less than 0 0450 inch 1 14 mm no.

Kitchen exhaust duct size code. We are open service tech support parts fast lead times from 6 local plants. New rules for kitchen exhaust an ashrae research project led to a new nfpa exhaust velocity standard. Minimum duct size of 4 recommended duct size of 6 401 600 cfm.

18 gage in thickness. A 0 to 400 cfm fan requires a 4 inch minimum duct size but a 6 inch duct is recommended. Minimum duct size of 6 recommended duct size of 8. You should also take into account the size of your kitchen in cubic feet when calculating the size range hood fan needed since a larger kitchen needs more venting to clear the air than a smaller room.

Exhaust november 2002 ash rae journal 27 duct size and corresponding volumetric flow rate while main taining constant aerosol concentration. Grease ducts serving type i hoods shall be constructed of steel having a minimum thickness of 0 0575 inch 1 463 mm no. I am an hvac designer but this is a question about an installation i am doing in my own house. The minimum duct sizes and recommended duct sizes based on a hood fan s cfm rating are as follows.