Table of Contents
- Exhaust carries grease aerosol and odors, so any recovery device must keep streams separate. Run-around coils and heat pipes are the safe choices; rotary wheels are generally avoided because of carryover and cleaning difficulty.
- Exhaust coil downstream of the grease filter and UV/ESPatch. Supply coil pre-heats or pre-cools incoming make-up air. Glycol loop (run-around) or sealed pipes (heat pipe) bridge the two. Bypass for 100 % exhaust during heavy cooking.
- 20-40 % lower make-up air heating or cooling cost. Smaller make-up air unit capacity. More stable kitchen temperature and comfort. Lower carbon footprint for the facility.
- Will grease clog the exchanger? Not if the exhaust coil is placed after the hood filters and cleaned on a schedule; run-around coils are easiest to wash. Does it meet fire codes? Yes when designed per NFPA 96 with proper separation, drain, and access panels.
Commercial kitchens run powerful hoods that throw away large amounts of hot, greasy air. Replacing it with conditioned make-up air is a major cost. Kitchen heat recovery captures the sensible heat while keeping grease and smoke out of the supply.
Exhaust carries grease aerosol and odors, so any recovery device must keep streams separate. Run-around coils and heat pipes are the safe choices; rotary wheels are generally avoided because of carryover and cleaning difficulty.
- Exhaust coil downstream of the grease filter and UV/ESPatch.
- Supply coil pre-heats or pre-cools incoming make-up air.
- Glycol loop (run-around) or sealed pipes (heat pipe) bridge the two.
- Bypass for 100 % exhaust during heavy cooking.
- 20-40 % lower make-up air heating or cooling cost.
- Smaller make-up air unit capacity.
- More stable kitchen temperature and comfort.
- Lower carbon footprint for the facility.
Will grease clog the exchanger?
Not if the exhaust coil is placed after the hood filters and cleaned on a schedule; run-around coils are easiest to wash.
Does it meet fire codes?
Yes when designed per NFPA 96 with proper separation, drain, and access panels.