Aprilaire 8100 Manual

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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.

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

•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.)

DAMPER

FIGURE 16 – Damper in ERV Supply

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DAMPER

FIGURE 15 – Damper in ERV Return

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INSULATED DUCT

BUTTERFLY DAMPER

(IF ERV NOT RUNNING CONTINUOUSLY)

FRESH AIR

FROM OUTSIDE

STALE AIR

TO OUTSIDE

FIGURE 17 – Ducting to Outdoors

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