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3. TYPES OF INSTALLATIONS
(CONTINUED)
SIMPLIFIED SYSTEM
INSTALLATION
When using this application make
sure that there is minimum 3 feet
(0.9 m)between the fresh air and
exhaust air connections of the
HRV/ERV in the return air duct.
(see figure 3.3)
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)
* For minimum distance between
return and forced air system, check
with your local building codes and
forced air system manufacturer.
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
figure 3.3
IMPORTANT:
The duct bringing
outdoor air to the return air plenum
must be equipped with a manual
dumper to balance the outdoor
airflow.
Interior Wall
Recirculated Air
Exterior Wall
MECHANICAL ROOM
MECHANICAL ROOM
Recirculated
warm ambient
air to home
Recirculation Port
Recirculated
warm ambient
air to home
Exhaust hood equiped
with damper or installation
of optional backdraft damper
Recirculation Port
Interior Wall
Recirculated Air
Exterior Wall
MECHANICAL ROOM
MECHANICAL ROOM
Recirculated
warm ambient
air to home
Recirculation Port
Recirculated
warm ambient
air to home
Exhaust hood equiped
with damper or installation
of optional backdraft damper
Recirculation Port
FOR TYPE OF HRV/ERV WHICH USES A 5TH PORT FOR THE DEFROST SEQUENCE.
The 5th port must be duct so as to avoid a depressurization during defrost. (Reference: Quebec, Novoclimat 2.0, Section 3.4.3.3)
Building and combustion appliance installation codes do not allow return air grilles or openings such as "breather tee" or indirect connections in an
enclosed room that is susceptible to spillage of combustion appliances.
Option 1
Option 2
