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3. TYPES OF INSTALLATIONS
DIRECT DUCTED SYSTEM
This application uses a devoted
duct system for the supply
and the exhausting of stale air
accumulated in the home.
It is recommended to install fresh
air grilles in all bedrooms and living
areas. Exhaust the stale air from
the bathroom, kitchen and laundry
room. (see figure 3.1)
IMPORTANT:
For optimal performance
of your HRV or ERV, the installation of an
optional 6” round galvanized backdraft
damper is required on the fresh air to
home duct work.
figure 3.1
EXTENDED EXHAUST
SYSTEM
This application uses a devoted
duct system for the exhausting of
stale air accumulated in the home.
The fresh air is dumped into the
return air duct and is distributed
thru the home by the existing
supply air ductwork of the forced
air system. (see figure 3.2)
Make sure when using this application
that your fresh air duct connection to
the forced air system return air duct
is not less than 10ft (3 m) upstream of
the return plenum connection to the
forced air system. Check with your
local code or the forced air system’s
manufacturer. The HRV and forced air
system must be in continuous mode,
to achieve maximum comfort and to
avoid cross-contamination.
NOTE TO INSTALLER
: Dwellings
with multiple forced air systems
requires one HRV/ERV per system.
Insure the unit runs in conjunction
with forced air system (Ref. wiring
diagram for furnace interlock)
figure 3.2
* For minimum distance between
return and forced air system, check
with your local building codes and
forced air system manufacturer.
IMPORTANT:
The duct bringing
outdoor air to the return air plenum
must be equipped with a manual
dumper to balance the outdoor
airflow.
IMPORTANT:
For optimal performance of your HRV or ERV, the installation of an optional 6" round galvanized backdraft damper is required on the fresh air to home duct
work. When performing duct connections, always use approved tools and material. Also use steel duct connections for these type of installs.
Return from
Bathroom or Kitchen
Distribution to
living space
18”
457 cm
6 ft
1.83 m
HRV/ERV
HRV/ERV
Return from
Bathroom or Kitchen
Distribution to
living space
18”
457 cm
6 ft
1.83 m
A
B
A+B=Not less than 10ft (3 m) *
HRV/ERV
Distribution to
living space
18”
457 cm
6 ft
1.83 m
A
B
A+B=Not less than 10ft (3 m)*
3ft (0.9 m)
MINIMUM
DISTANCE
Return from
Bathroom or Kitchen
Distribution to
living space
18”
457 cm
6 ft
1.83 m
HRV/ERV
HRV/ERV
Return from
Bathroom or Kitchen
Distribution to
living space
18”
457 cm
6 ft
1.83 m
A
B
A+B=Not less than 10ft (3 m) *
HRV/ERV
Distribution to
living space
18”
457 cm
6 ft
1.83 m
A
B
A+B=Not less than 10ft (3 m)*
3ft (0.9 m)
MINIMUM
DISTANCE
