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HE-Series Indoor
ERV
INSTALLATION
5.0 INSTALLATION
5.2 FLOOR INSTALLATION
Most units are installed in a location specified by others. In general, it’s preferable to install the
unit on a flat, reasonably level surface, such as a concrete floor.
4.3.3 Radiated Noise
The HE4XINV is insulated with high-density fiberglass. This provides significant attenuation of
radiated sound.
The outlet ducts can be significant sources of radiated sound as well. The FA and EA ducts
(outlet ducts) should be insulated for sound control. This insulation should start at the unit. At a
minimum the first ten feet of duct should be insulated. All parts of the FA and EA ducts located
in the mechanical space should be insulated for sound control, both to minimize sound radiation
out of these ducts and also to control sound radiation into the ducts.
4.3.4 Aerodynamic (Velocity) Noise
When sound attenuation is a design concern, the primary consideration is velocity noise at the
unit’s Fresh Air blower outlet. The average velocity at the Fresh Air blower outlet is 2984 FPM
when the unit is operating at 3000 CFM.
5.1 DUCTWORK
5.1.1 Ducts to the Outside
The exhaust outlet and fresh air inlet on the outside of the building should be at least 10' apart
to avoid cross-contamination. The exhaust outlet should not dump air into an enclosed space or
any other structure. The inlets and outlets should be screened against insects and vermin and
shielded from the weather to prevent the entry of rain or snow.
Ducts connecting the HE4XINV to the outside must be insulated, with sealed vapor barrier on
both inside and outside of the insulation. Insulate both the Outside Air (OA) and Exhaust Air (EA)
ducts.
5.1.2 Inside Ductwork System
Ensure Good Ductwork Design
Ductwork should be designed to allow the unit to provide the required airflow and reduce
pressure drop for efficient, quiet operation. If the inside ducts run through unconditioned spaces
they must be insulated with a sealed vapor barrier on both inside and outside of insulation.
NOTE: Ducts inside
a building that are
connected to the
outside must be
insulated with a sealed
vapor barrier on both the
inside and the outside of the
insulation.
NOTE: It is the
installer’s respon-
sibility to select
appropriate materials
capable of safely support-
ing the weight of the ERV
and all attached hardware,
such as ductwork. It is the
installer’s responsibility to
determine the location of
the ERV and the needed
supporting threaded rods.
All such installations must
be reviewed and approved
by an engineer.
