Broan HRV100H Service Manual download pdf (Page 11)

There are two methods for connecting the unit to the furnace:

Method 1: Supply side connection

• Cut an opening into the furnace supply duct at least 18 inches (0.5 m) from the

furnace.

• Connect this opening to the fresh air distribution port of the HRV/ERV (use metal

duct, see figure 10).

• Make sure that the HRV/ERV duct forms an elbow inside the furnace ductwork

• If desired, interlock (synchronize) the furnace blower operation with the HRV/ERV

operation. (See Section 7.4).

Method 2: Return side connection

• Cut an opening into the furnace return duct not less than 10 feet (3.1 m) from the

furnace (A + B).

• Connect this opening to the fresh air distribution port of the HRV/ERV (see

figure 11).

NOTE: For Method 2, it is not essential that the furnace blower runs when the HRV/ERV

is in operation, but we recommend it. If desired, synchronize the furnace

blower operation (see Section 7.4).

5.4 INSTALLING THE DUCTWORK AND REGISTERS

5. Installation (cont’d)

5.4.1 Fully Ducted System (as illustrated in Section 4.1)

Stale air exhaust ductwork:

• Install registers in areas where contaminants are produced: kitchen, bathrooms, laundry room, etc.

• Install registers 6 to 12 inches (152 to 305 mm) from the ceiling on an interior wall OR install them in the ceiling.

• Install the kitchen register at least 4 feet (1.2 m) from the range top.

• If possible, measure the velocity of the air flowing through the registers. If the velocity is higher than 400 ft/min. (122 m/min),

then the register type is too small. Replace with a larger one.

Fresh air distribution ductwork:

• Install registers in bedrooms, dining room, living room and basement.

• Install registers either in the ceiling or high on the walls with air flow directed towards the ceiling.

(The cooler air will then cross the upper part of the room, and mix with room air before descending to occupant level.)

• If a register must be floor installed, direct the air flow up the wall.

5.4.2 Exhaust Ducted System (Source Point Ventilation) (as illustrated in Section 4.2)

Stale air exhaust ductwork:

(Same as for Fully Ducted System, described on Section 5.4.1)

Fresh air distribution:

WARNING

Never install a stale air exhaust register in a room where a combustion device is, such as a gas furnace, a gas

water heater or a fireplace.

VD0040

VD0041

MINIMUM

18”

(0.5 M)

METAL DUCT WITH

BACKDRAFT DAMPER

A + B = NOT LESS

THAN 10’ (3.1 M)

Figure 10

Figure 11

WARNING

When performing duct connection to the furnace, installation must be done in accordance with all applicable

codes and standards. Please refer to your local building code.

CAUTION

When performing connection to the furnace supply duct, this duct must be sized to support the additional

airflow produced by the HRV/ERV. Also, use a metal duct with a backdraft damper to prevent the risk of

overheating the HRV/ERV.

CAUTION

The ductwork is intended to be installed in compliance with all applicable codes.

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