3
Step 3 — Install Drain Line —
Through normal op-
eration and during defrost mode, the HRV may produce some
condensation. This water should be directed to flow into a
nearby drain, or be removed by a condensate pump. The HRV
and all condensate lines must be installed in a space where the
temperature is maintained above the freezing point. A P-trap
should be made in the drain line. This will prevent odors from
being drawn back up into the unit.
To install the drain line, install the drain nipple provided.
See Fig. 6.
Install the drain hose onto the drain nipple. Loop the hose to
create a P-trap as shown in Fig. 7. Run the hose to a nearby
drain.
Step 4 — Locate and Install Weather Hoods —
The intake weather hood should be located upstream and at
least 4 to 6 ft away from the exhaust weather hood. The intake
weather hood should be at least 6 ft away from dryer vents and
furnace exhaust (on medium or high efficiency furnaces) and a
minimum of at least 6 ft from driveways, oil fill pipes, gas
meters, or garbage containers.
Locate the hoods at least 18 in. above the ground, or above
the depth of expected snow accumulation. The hoods should be
at least 3 ft from the corner of the building. Do not locate in a
garage, attic or crawl space.
A well designed and installed ducting system will allow the
HRV to operate at its maximum efficiency. Always keep duct
runs as short and straight as possible.
To install the intake and exhaust weather hoods, perform the
following:
1. Using the collar of the outside hood, outline the intake
and exhaust holes to be cut. The hole should be
slightly larger than the collar to allow for the thickness
of the insulated flexible duct. See Fig. 8.
2. Cut a holes using the outline from Step 1. See Fig. 8.
When cutting or drilling holes, be careful not to dam-
age electrical wiring or other hidden objects in wall.
3. Pull the insulated flexible duct through the opening
until it is well extended and straight. Slide the duct
inner vinyl sleeve over the hood collar and secure. See
Fig. 9.
4. Pull the insulation over the duct and then the vapor
barrier over the sleeve and secure with duct tape. See
Fig. 9.
5. Push the hood into the opening. Attach the hood to the
outside wall with mounting screws. See Fig. 10.
6. Using a caulking gun, seal around the hoods to prevent
any leaks. See Fig. 11.
Step 5 — Install Ducting To Weather Hood
Location —
The inner liner of the flexible insulated duct
was secured to the intake and exhaust weather hoods in Step 4.
Run the other end of the flexible duct to the HRV installation
location. See Fig. 12.
Clamp the end of the duct to the appropriate port on the
HRV. See Fig. 2.
The insulation should remain full and not be crushed. The
outer liner, which acts as a vapor barrier must be completely
sealed to outer wall and the HRV using tape and/or caulking. A
good bead of high quality caulking (preferably acoustical seal-
ant) will seal the inner flexible duct to both the HRV port and
the weather hood prior to clamping.
To minimize airflow restriction, the flexible insulated duct
that connects the two outside weather hoods to the HRV should
be stretched tightly and be as short as possible. Twisting or
folding the duct will severely restrict airflow.
Fig. 7 — Install P-Trap
Fig. 6 — Install Drain Nipple
Fig. 8 — Cut Holes for Weather Hoods
Fig. 9 — Install Duct and Sleeve
Fig. 10 — Install Hoods
