HE3XINV Due to continuing product development, specifications are subject to change without notice. © 2012 RenewAire LLC
134772_006 HE3XINVMan_Jan12.indd Revised 01/2012 www.renewaire.com
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Placement of the HE3XINV
The HE3XINV is designed for installation in a sheltered location,
out of the weather.
The preferred mounting location is sitting on a concrete floor.
Unit base may be bolted to floor. The concrete will isolate any
blower vibration.
Select a location that is central to the inside duct runs, and close
to both the exhaust duct (to the outside) and the fresh air duct
(from the outside).
The
exhaust outlet and outside air inlet
on the outside of
the building should be at least
ten feet 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.
Install the ERV where you can open the door for cleaning the core
and filter, and where you can get at the wiring for installation
and service.
RA = Room Air into unit
OA = Outside Air into unit
FA = Fresh Air to inside
EA = Exhaust Air to outside
NOTE
Airstreams always cross in
the energy-exchange core.
Duct Connections
as Labeled
Alternate
Duct Connections
RA
EA
FA
OA
RA
EA
FA
OA
The fresh air inlet should be at least 10’ away from
chimneys, furnace and water heater exhausts, and
other sources of carbon monoxide, humidity or other
contamination.
Do not locate the fresh air inlet where vehicles may
be serviced or left idling.
Never locate the fresh air inlet inside a structure.
Exhaust & Fresh Air Ducts
Between HE3XINV & Outside
Insulation
Ducts connecting the HE3XINV to the outside must be insulated,
with sealed vapor barrier on both inside and outside of the
insulation.
The exhaust outlet and fresh air inlet on the outside of the building
should be at least ten feet apart to avoid cross-contamination.
Wall caps should be designed to exclude animals and rain. Wall
caps should be sized for minimum pressure loss. To keep rain from
being drawn in, the outside air intake should be large enough to
keep inlet velocity below 500 feet per minute, (or as dictated by
local practice).
Outside Wall Caps
FA
RA
EA
OA
OA
EA
Best Practice is to separate OA and EA Wall Caps by 10' or more.
Always insulate
OA and EA Ducts.
Insulate FA and RA Ducts if
installed in unconditioned spaces
or for sound attenuation.
Straight ducts at Blower Outlets
is preferred for best performance.
