Lifebreath CONTROLAIR 15 200MAX Manuale Utente

A well designed and installed ducting system will allow the
HRV/ERV to operate at its maximum efficiency.

Always try to keep duct runs as short and straight as possible.
See 

for various installation options.

The fixed covered hoods have a built-in bird screen with a
1/4" (6 mm) mesh to prevent foreign objects from entering 
the ductwork.

•  Should be located upstream (if there are prevailing winds)

from the exhaust outlet

•  At least 6' (2 m) from the exhaust weatherhood
•  At least 6' (2 m) away from dryer vents and furnace

exhaust (medium or high efficiency furnaces)

•  A minimum of at least 6' (2 m) from driveways, oil fill 

pipes, gas meters, or garbage containers

•  At least 18" (457 mm) above the ground,

or above the depth of expected snow accumulation

•  At least 3' (1 m) from the corner of the building
•  Do not locate in a garage, attic or crawl space

•  At least 6' (2 m) from the ventilation air intake
•  At least 18" (457 mm) above ground or above the depth 

of expected snow accumulation 

•  At least 3' (1 m) 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 weatherhood, its outside perimeter 

sealed with exterior caulking.

The inner and outer liners of the flexible insulated duct must
be clamped to the sleeve of the weatherhoods (as close to
the outside as possible) and the appropriate port on the
HRV/ERV. It is very important that the fresh air intake line
be given special attention to make sure it is well sealed. A
good bead of high quality caulking (preferably acoustical
sealant) will seal the inner flexible duct to both the
HRV/ERV 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/ERV
should be stretched tightly and be as short as possible.

Twisting or folding the duct will severely restrict air flow. See
below for the recommended connection of flexible insulated
ducts to the the outside weatherhoods and the HRV/ERV.

To maximize airflow in the ductwork system, all ducts should
be kept short and have as few bends or elbows as possible.
Forty-five degree elbows are preferred to 90° elbows. Use
“Y” tees instead of 90° elbows whenever possible.

All duct joints must be fastened with screws, rivets or duct
sealant and wrapped with a quality duct tape to prevent 
leakage. We recommend aluminum foil duct tape.

Galvanized ducting from the HRV/ERV to the living areas 
in the house is recommended whenever possible, although 
flexible duct can be used in moderation if necessary.

To avoid possible noise transfer through the ductwork 
system, a short length (approximately 12 " or 300 mm) of non-
metallic flexible insulated duct should be connected between
the HRV/ERV and the supply/ exhaust ductwork system.

The main supply and return lines to/from the HRV/ERV
must be 6 inches (150 mm) minimum. Branch lines to the
individual rooms may be as small as 4 inches (100 mm),
but 5 inch (125 mm) lines are preferred .

All ducts running through attics and unheated spaces must
be sealed and insulated to code.