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INTERIOR DUCTING INSTALLATION
• To maximize airflow through the ductwork system, all ducts should be kept short
and have as few bends or elbows as possible.
• 45º elbows are preferable to 90º.
• Use "Y" ducts instead of "T" ducts whenever possible.
• All duct joints must be fastened with screws or duct sealant and wrapped with
aluminum foil duct tape to prevent leakage.
• Galvanized ducting from the HRV to the living areas in the house is recommended
whenever possible, although flexible ducting can be used in moderation when
necessary.
• To avoid possible noise transfer through the ductwork system, a short length
(approximately 300mm, 12'') of nonmetallic flexible insulated duct should be
connected between the HRV and the supply/exhaust ductwork system.
• The main supply and return line to/from the HRV must have the same diameter as the
duct connection or larger.
• Branch lines to the individual rooms may be as small as 100mm (4'').
INSTALLING DUCT TO HRV
For flexible duct installation, slide flexible ducting onto duct connection. Then install a cable tie over flexible duct to prevent leakage between the ducting and
the duct connection.
In the case of solid ducting, slide duct over duct connection, screw in place and sea
SUPPLY AIR GRILLES LOCATION
In homes without a forced air furnace, fresh air should be supplied to all habitable rooms, including bedrooms and living areas. It should be supplied
from high wall or ceiling locations. Grilles that diffuse the air comfortably are recommended. In homes with a forced air furnace, you may want to connect
the HRV to the furnace ductwork (see information below).
EXHAUST AIR GRILLES LOCATION
The stale air exhaust system is used to draw air from the points in the house where the worst air quality problems occur. It is recommended that return
air ducts be installed in the bathroom, kitchen, and laundry room. Additional return air ducts from strategic locations may be installed. The furnace
return duct may also be used to exhaust from. In this method, the exhaust air is not ducted back from bathrooms, kitchens, etc to the HRV with
"dedicated lines".
As per building codes and installation requirements for combustion appliances:
Air return ducts, or openings for air return, should not be placed in enclosed spaces containing combustion
appliances that are subject to spillage.
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HRV INSTALLATION
LOCATION
The HRV must be located in a conditioned space where it will be possible to conveniently service the unit. Typically
the HRV would be located in the mechanical room or an area close to the outside wall where the weatherhoods will
be mounted. If a basement area is not convenient or does not exist, a utility room may be used.
Attic installation must meet the following conditions:
• Have a nearby power supply
• Attic temperature must be above freezing conditions at all times and for best performance should be 12°C
(120 volts, 60Hz)
(54 °F).
• Choose a location which
• The condensate drain (if included) must be installed so that the condensate drains and is protected from freezing.
allows the possibility
• The attic is easily accessible for equipment maintenance and inspection.
of mounting the unit to
supporting beams.
Connecting appliances to the HRV is not recommended. These include:
• The unit should be level
• Clothes dryer
in order to allow proper
condensate drainage
• Range top
• To minimize noise, do not
• Stovetop fan
install unit in living area
• Central vacuum system
• Ensure proper drainage
• Bathroom exhaust fans unless they are specifically designed for this purpose
These appliances may cause lint, dust or grease to collect in the HRV, damaging the unit.
Connecting any of these types of appliances to the HRV will void your warranty.
Mounting- Chain mount
2 Attach a hanging chain
1 Place fastening hooks on
(provided) to each 19 mm
the strapping board or
(3/4") bolt (provided) in the
the floor joists.
top 4 corners of the unit
and tighten.
3 Hang the unit by slipping
4 Install a spring on each
a link onto the hanging
chain. Hook the spring
hooks, making sure the
in the links so a loop is
unit is level.
created in the chain. The
spring will then support the
unit's weight and absorb
vibrations.
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