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The Three Methods of Installation
The following three installation methods are for the
HRV/ERV system:
• The Simplified installation.
• The Partially Dedicated Installation
• The Fully Dedicated Installation
Simplified Installations
The Simplified Installation draws stale air from the cold air
return duct of the air handler/furnace and introduces an
equal amount of fresh air farther downstream into the cold
air return. Refer to "Simplified Installation Diagrams".
The air handler/furnace blower must be running when the
unit is operating for this system to be effective. Refer to
"Interlocking the HRV/ERV to an Air Handler/Furnace
Blower".
Partially Dedicated Installations
The Partially Dedicated Installation draws stale air from
specific points in the house and introduces an equal amount
of fresh air into the cold air return. Refer to "Partially
Dedicated Installation Diagrams".
Stale air ducts should be installed in areas of the home
where the poorest indoor air quality exists (bathrooms and
kitchen). Each location with a stale air duct should have a
timer to initiate high speed ventilation. Refer to "Optional
Timers" in this manual.
The air handler/furnace blower should be running when the
HRV is operating to evenly distribute the fresh air
throughout the house. Refer to "Interlocking the HRV/ERV
to an Air Handler/Furnace Blower".
Fully Dedicated Installations
The Fully Dedicated Installation draws stale air from
specific points in the house and delivers fresh air to specific
locations of the house. This system is not connected to an
air handler/furnace. Refer to "The Fully Dedicated
Installation Diagrams" in this manual.
Stale air ducts should be installed in areas of the home
where the poorest indoor air quality exists (bathrooms and
kitchen). Each location with a stale air duct should have a
timer which will initiate high speed ventilation. Refer to
"Optional Timers" in this manual.
Fresh air ducts should be installed to all bedrooms and
living areas, excluding bathrooms, kitchen and utility areas.
Grilles should be located high on a wall or in ceiling
locations. Grilles that diffuse the air comfortably are
recommended. Refer to "Grilles" in this manual. Special
care should be taken in locating grilles if the floor is the
only option available. Areas such as under baseboard
heaters will help to temper the air.
Optional in-line duct heaters are available for mounting in
the supply duct work to add heat if required.
Installing the Ducting Between the HRV/ERV &
Living Areas in the House
A well designed and installed ducting system will allow the
HRV/ERV to operate at its maximum efficiency.
All ducts should be kept short and have as few bends or
elbows as possible to maximize airflow. Forty-five degree
elbows are preferred to 90° elbows. Use "Y" tees instead of
straight tees whenever possible.
All duct joints must be fastened with screws, rivets or duct
sealant and wrapped with mastic or quality duct tape to
prevent leakage. Mastic is preferred but if duct tape is used,
we recommend aluminum foil duct tape.
Galvanized (rigid) 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.
A short length (approximately 12 inches or 300mm) of non-
metallic flexible insulated duct should be connected
between the HRV/ERV and the supply/exhaust duct system
to avoid possible noise transfer through the duct system.
All ducts running through attics and unheated spaces must
be sealed and insulated to code.
Installation Methods
ATTENTION
Applications such as greenhouses, atriums,
swimming pools, saunas, etc. have unique
ventilation requirements which should be
addressed with an isolated ventilation system.