Fantech SHR 1504 Operation Manual - page 15
7
EXTERIOR DUCTING INSTALLATION
WEATHERHOOD LOCATION
• 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 a minimum distance of 3m (10') away from dryer vents and furnace exhaust (medium or high efficiency furnaces), driveways, oil
fill pipes, gas meters, or garbage containers
• At a minimum height of 457mm (18") above the ground, or above the level of expected snow accumulation
• At a minimum distance of 1m (3') from the corner of the building
• Do not locate in a garage, attic or crawl space
Locating the Exhaust Weatherhood
• At least 457mm (18") above ground or above the depth of expected snow accumulation
• At least 1m (3') 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
• Do not locate in a garage, workshop or other unheated space
INSTALLING THE DUCTING TO THE WEATHERHOODS
A well designed and installed ducting system will allow the HRV to operate at its
maximum efficiency. The inner liner of the flexible insulated duct must be
secured to the sleeve of the weatherhoods (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 the outer wall and the HRV using tape and/or caulking. A good bead of
high quality caulking (preferably acoustical sealant) will seal the inner flexible
duct to both the HRV port and the weatherhood prior to securing them.
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 or folding the duct will severely restrict air flow.
See “Installation Diagrams” for installation examples.
Model
Description
FML 8*
8" Metal Hood (White)
COM 6P
Plastic Supply & Exhaust Hoods
COM 6M
Metal Supply & Exhaust Hoods
* Can be used as supply or exhaust hood
1 Using the collar of the out-
side hood, outline the intake
& exhaust hole to be cut. The
holes should be slightly larg-
er than the collar to allow for
the thickness of the insulated
flexible duct. Cut a hole for
both the intake and exhaust
hoods.
3 Push the hood into the
opening, then attach the
hood to the outside wall
with mounting screws.
Repeat the installation
procedure for both the
Supply and Exhaust hoods.
2 Pull 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 pull the vapor
barrier over the sleeve.
Secure with duct tape.
4 Using a caulking gun, seal
around both hoods to prevent
any leaks.
STEPS FOR HOOD INSTALLATION: