Furnace duct/HRV connection

Insulation · Ventilation Systems · printed page 255 (PDF page 256)

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Book index entries

Furnace Ducts – HRV Connection Furnace Duct Connection

Text in the illustration

indirect connection
AIRFLOW
cold air return
10' (minimum)
3' (min.)
fresh air
direct connection
exhaust
HRV
gas furnace
cold-side ducts

Generated explanation

The illustration shows a heat recovery ventilator (HRV) connected to the cold-air return duct of a gas furnace. Arrows show return air moving toward the furnace, fresh air entering the return duct from the HRV, and exhaust air being drawn from the return duct toward the HRV. The exhaust takeoff is shown at least 3 feet upstream of the fresh-air connection, with a minimum 10-foot distance indicated between the fresh-air connection and the furnace end of the return duct. The main drawing shows a direct fresh-air connection, while a circular inset illustrates an indirect connection with a gap between the duct outlet and the return opening. Two additional HRV connections are labeled as cold-side ducts.

Components

heat recovery ventilator (HRV)gas furnace cold-air return duct fresh-air duct exhaust duct cold-side ducts direct duct connection indirect duct connection furnace vent pipe

Materials

sheet metal ductwork

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