INSTALLING DUCTS GOING TO / FROM OUTSIDE
A well designed and installed ducting system will allow the HRV to operate at its maximum efficiency.
Always try to keep duct runs as short and straight as possible.
See Installation Diagrams for installation examples.
PRACTICAL
TIPS
•Decide where your intake and exhaust hoods will be located.
Locating the Intake
Weatherhood
• Should be located upstream |
(if there are prevailing winds) |
from the exhaust outlet |
• At least 4' - 6’ (2m) from the |
exhaust weatherhood |
• At least 6’ (2m) away from |
dryer vents and furnace |
exhaust ( medium or high effi- |
ciency furnaces) |
• A minimum of at least 6’ (2m) |
from driveways, oil fill pipes, |
gas meters, or garbage con- |
tainers |
• At least 18” (457mm) above |
the ground, or above the |
depth of expected snow accu- |
mulation |
INSTALLING THE DUCTING
TO THE WEATHERHOODS
The inner liner of the flexible insulated duct must be clamped to the sleeve of the weath- erhoods (as close to the outside as possible) and to the appropriate port on the HRV. The insulation should remain full and not be squished. 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 caulk- ing (preferably acoustical sealant) will seal the inner flexible duct to both the HRV port and the weatherhood prior to clamping.
To minimize air flow restriction, the flexible insulated duct that connects the two outside weatherhoods to the HRV should be stretched tightly and be as short as possible. Twisting of folding the duct will severely restrict air flow.
Model | Description |
Supply & Exhaust Plastic Hood Kit | |
| Supply & Exhaust Metal Hood Kit |
• At least 3’ (1m) from the cor- |
ner of the building |
• Do not locate in a garage, |
attic or crawl space |
* Application for Supply or Exhaust
Locating the Exhaust
Weatherhood
•At least 4' - 6’ (1m - 2m) from the ventilation air intake
•At least 18” (457mm) above ground or above the depth of expected snow accumulation
•At least 3’ (1m) away from the corner of the building
•Not near a gas meter, electric meter or a walkway where fog or ice could create a hazard
•Not into a garage, workshop or other unheated space
When installing the weather- hood, it’s outside perimeter must be sealed with exterior caulking.
1Using the collar of the outside hood, outline the intake & exhaust holes to be cut. The holes should be slightly larger than the collar to allow for the thickness of the insulated flexible duct. Cut a hole
for both the intake and exhaust hoods.
2Pull the insulated flexible duct through the opening until it is well extended and straight. Slide the duct’s inner vinyl sleeve over the hood collar and secure, pull the insulation over the duct and then the vapor barrier over the sleeve and secure with duct tape.
3 Push the hood into | 4 Using a caulking |
the opening. Attach | gun, seal around |
the hood to the | both hoods to |
outside wall with | prevent any |
mounting screws. | leaks. |
Repeat the |
|
installation procedure |
|
for both the Supply |
|
and Exhaust hood. |
|
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