Aprilaire 8100 manual RETURN From Living Space to ERV, SUPPLY Fresh Air From ERV to House

MECHANICAL INSTALLATION (continued)

DUCTING (continued)

RETURN: From Living Space to ERV

•Stale air from the house should be exhausted from one exhaust grille centrally located, such as a hallway. For multi-floor homes, the exhaust grille should be located on the same floor as the kitchen..

•To keep the core free of grease, the ERV duct work must not be connected to a kitchen exhaust fan duct.

•The ERV duct work should remain separate from bathroom exhaust fan ducts.

•6” round, galvanized duct work recommended. If rectangular duct is used, it must have an equivalent air flow rating..

•A sound absorber at least 6 ft. long, consisting of 1” thick rigid fiberglass duct or insulated flexible duct is recommended for maximum absorbing of air movement sounds between the unit and the living space return grille..

1..Install a balancing damper in the duct near the ERV.. (See Figure 15..)

2..Complete the Return ducting..

Figure 15 – Damper in ERV Return

DAMPER

90-1747

SUPPLY: Fresh Air From ERV to House

•It is recommended that the supply duct be connected directly to the HVAC return duct, a minimum of 10’ from the HVAC blower..

•6” round, galvanized duct work is recommended.

1..Install a balancing damper in the duct near the ERV.. (See Figure 16..)

2..Complete the Supply ducting.. Using a collar for the duct connection to the HVAC return duct is recommended..

OUTDOOR: Exhaust and Fresh Air Connections

Figure 16 – Damper in ERV Supply
DAMPER	DAMPER
	90-1753

•Insulated duct of at least R-4 insulating value with a continuous vapor barrier must be used for both duct runs connecting the ERV to the outdoors.. The vapor barrier must be sealed at both ends and extend from the ERV housing to the outer wall.. (See Figure 17..)

Figure 17 – Ducting to Outdoors
STALE AIR	BUTTERFLY DAMPER	FRESH AIR
TO OUTSIDE		FROM OUTSIDE
INSULATED DUCT	(IF ERV NOT RUNNING CONTINUOUSLY)
		90-1747

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