BALANCING KITCHEN EXHAUST DUCTS
BALANCING KITCHEN EXHAUST DUCTS
(OP)
HELLO ALL,
I have encountered an installation wherein kitchen exhaust steel ductwork connected to kitchen hoods at various floors in a hotel and then to a common extract fan needs to be balanced.The fresh air supply to the hoods connected by galvanised ductwork have balancing dampers but NFPA 96 disallows dampers in grease exhaust kitchen ducts,please explain how do we balance the system
Thanks
I have encountered an installation wherein kitchen exhaust steel ductwork connected to kitchen hoods at various floors in a hotel and then to a common extract fan needs to be balanced.The fresh air supply to the hoods connected by galvanised ductwork have balancing dampers but NFPA 96 disallows dampers in grease exhaust kitchen ducts,please explain how do we balance the system
Thanks





RE: BALANCING KITCHEN EXHAUST DUCTS
I say pack your bags and run from this site...
RE: BALANCING KITCHEN EXHAUST DUCTS
RE: BALANCING KITCHEN EXHAUST DUCTS
normally what we did for kitchen exhaust was introduce 95% of make up air from outside to the kitchen exhaust. Is it consider air balancing for you? Normally we do not allow fire damper at the kitchen exhaust duct.
RE: BALANCING KITCHEN EXHAUST DUCTS
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RE: BALANCING KITCHEN EXHAUST DUCTS
Basically, the farthest duct to hood will have the largest diameter, the the closest to the fan will have smaller diameter.
hope this helps.
RE: BALANCING KITCHEN EXHAUST DUCTS
In the past on installations like this, I have found curtain type fire dampers where the ducts pass through fire walls.
I have also found that after several years the blades of these fire dampers, are nothing but piles of rust in the bottom of the duct from the steam coming up the duct.
B.E.