18-HE58D1-5
7
Installer’s Guide
10 Ft. min
12 in. min
above snow line
OA
EA
FA
RA
Legend
RA - Room Air
OA - Outside Air
FA - Fresh Air
EA - Exhaust Air
Figure 12
The exhaust outlet and fresh air inlet on the outside of
the building
should be at least ten (10) feet apart
to
avoid cross contamination.
The Outdoor fresh air inlet must be located a mini-
mum of 10 feet from any other exhaust vent, gas
meter, outdoor grill, or source of open flame.
Fresh air inlets must also be located a minimum of
ten (10) feet from oil tank fill tubes, garbage cans and
any other source of contamination. Fresh air inlet and
outlets should not be installed in areas of stagnant air.
Fresh air inlet and outlet hoods should be located a
minimum of twelve (12) inches above the normal snow
level.
CAUTION
!
Failure to follow installation instructions may lead to
premature failure of the heat transfer core.
The ERV fresh air inlet and return air grilles must not
be located in the same room as an indoor swimming or
exercise "lap" pool.
Determine outlet locations. Cut correct size hole. Cut a
short piece of 6" round duct to connect to the fresh air in-
let and exhaust air outlet hoods. For Model EERVR100
or EERVR200. Use 8" round duct for Model EERVR300.
Secure duct to inlet and outlet hood duct collars with
installer supplied fasteners. Install hood and ductwork
through penetration. See figure 13 for sealing duct pen-
etration and duct collar.
Fill and seal COMPLETELY
with Expanded Foam
Figure 13
DUCTWORK CONNECTING ERV TO IN-
DOOR TERMINATION POINTS
CAUTION
!
Failure to follow this installation instruction may result
in property damage from sweating ductwork.
Insulate all connecting ductwork from the ERV to any
indoor termination point that will be subject to forming
condensation. Flexible or metal duct may be used.
An ERV can be applied either with an independent free
standing fresh and return air duct system or the fresh
air supply can be connected to the cooling and heating
system return air duct. The following guidelines should
be considered when applying and installing either duct
system.
FRESH AIR DUCT CONNECTION TO THE COOLING
AND HEATING SYSTEM RETURN AIR DUCT
The Fresh Air Supply duct from the ERV should be
connected a minimum of three (3) feet up stream of the
indoor unit return plenum. (See Figure 7)
A connection closer than three 3 foot may result in
unbalanced airflow. Use a minimum of 5 foot section
insulated flexible duct to connect the ERV port labeled
“Fresh Air To Inside” to the return air duct.
FREE STANDING DUCT SYSTEM
For free standing ERV duct systems one or two fresh air
grilles located in a central part of the house will provide
effective distribution of the fresh air into the home par-
ticularly when the air to be exhausted from the home is
returned from several points. Use a minimum of 5 foot
insulated flexible duct from the ERV port labeled “Fresh
Air To Inside” to the point of termination.
