Fantech SHR 1505R - Exterior Ducting Installation; Weatherhood Location; Installing the Ducting to the Weatherhood; Steps for Hood Installation

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fantech
Exterior ducting installation
Weatherhood Location
 
Locating the Intake Weatherhood

exhaust outlet.

(medium or high efficiency furnaces), driveways, oil fill pipes, gas meters,
or garbage containers.

level of expected snow accumulation.


Locating the Exhaust Weatherhood




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
weatherhood (as close to the outside as possible) and to the appropriate duct connection on the
HRV. The insulation should remain full and not crushed. 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 duct connection and the weatherhood prior to securing them.
To minimize airflow 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 airflow.
See “Installation Diagram Examples” for installation examples.
1 
the outside hood, outline the
intake & exhaust holes to be
cut. The holes should be slightly
larger than the duct connection
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
and 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 duct connection
and secure. Pull the insulation
over the duct and pull the vapor
barrier over the sleeve. Secure
with appropriate tape or
sealant.
4 
around both hoods to prevent
any leaks.
Steps for hood installation:
36" (1m)
min.
INTAKE
OUTSIDE CORNER INSIDE CORNER
EXHAUST
18" (460mm) min.
18" (460mm) min.
6' (2m)
min.
36” (1m)
min.