Make Up Air For Range Hood
@kaseki and other knowledgeable folks!
Make up air for range hood. The fresh air damper is installed into a completely separate duct independent of the range hood ducting. Used on hoods with ventilation greater than 400 cfm. Any recommendations on the best place to locate the mua vent?
The hvhc guys have it installed and everything works well. Makeup air is outside air that replaces air exhausted from inside the building. Exhaust hood systems capable of exhausting in excess of 400 cfm (0.19 m 3 /s) shall be provided with makeup air at a rate approximately equal to the exhaust air rate.
Outdoor air and transfer air intended to replace exhaust air2. It attaches to your ducting, and a pressure switch signals to the damper to release and bring fresh air into your home. In most houses, there are several appliances that push or pull air out of the house, including clothes dryers, bathroom fans, fireplaces and kitchen range hoods.
To avoid backdraft problems in the fireplace from the vent hood suction, i want to add a makeup air vent from the outside into the kitchen ceiling, with a motorized damper wired to open when the vent fan comes on. No purchase of costly tempered unit. The hood is over a wolf rangetop capable of putting out around 90,000 btu (it includes a rangetop grill).
Instead a sensor is attached to the exhaust duct to detect if the range hood is operating The air flow switch and damper are linked thru low voltage wiring. Short cycle or internal compensating design directs the air into the front inside of the hood.
Instead a sensor is attached to the exhaust duct to detect if the range hood is operating I bought the broan make up air unit from amazon because i needed an 8diameter vent duct for that zephyr unit. I was originally planning on placing the ceiling vents on either side of the hood chimney.
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