HE3XRT
Due to continuing product development, specifications are subject to change without notice.
© 2012 RenewAire LLC
134773_005 HE3XRTMan_Jan12.indd Revised 01/2012 www.renewaire.com
Page 3
Mounting the HE3XRT
On Roof Curbs:
The base of the HE3XRT Unit is designed for installation on our
optional Roof Curb. See drawing below.
Before installing HE3XRT, apply roofing and counterflashing to
Roof Curb as per standard practice.
Install appropriate gasket on top of Roof Curb.
Set HE3XRT in place. We recommend bolting through sides of unit
base into the Roof Curb to secure the unit against high winds.
On Equipment Rails:
Review drawing of Roof Curb and specify Equipment Rail to fit.
Before installing HE3XRT, apply roofing and counterflashing to
Equipment Rails as per standard practice.
Set HE3XRT in place. We recommend bolting through sides of unit
base into the Equipment Rails to secure the unit against high winds.
Inside Ductwork System
Follow Engineer’s Ductwork Design
Ductwork should be designed by an engineer to allow the unit to
provide the required airflow.
Duct Insulation
If the inside ducts run through un-conditioned spaces, they must
be insulated, with a sealed vapor barrier on both inside and
outside of insulation.
Change Sheaves if required to Set and Balance Air Flow
In most applications, the airflow rate for both the Fresh Air and
the Exhaust Air should be roughly equal (or “balanced”) for best
performance of the HE3XRT Unit.
In most cases, the job engineer will specify flow rates and ESP
requirements. The blower motors will also be specified to provide
the required performance.
See unit specification sheet for CFM/ESP curves for available
horsepower motors.
See drawings below for examples of some common installation
approaches:
Connecting Ducts to Unit
Any duct connections to the sides of the unit
are equipped with
double-flanged duct connections. These allow for connection of
ducts insulated on the inside or the outside, or for installation
of lined duct.
Connect ducts to these flanges with standard S-Slips. Seal duct
exterior to the unit to keep the weather out.
Any duct connections to the bottom of the unit
are made to
the duct supports on the optional roof curb. The sizes of the duct
openings in the curb allow for ducts to be insulated on the inside
or the outside.
Option Code
Room Air [RA] Inlet
INNER [OUTER]
Fresh Air [FA] Outlet
INNER [OUTER]
HE3XRTV
11” x 34” (on bottom)
[13” x 36”]
11” x 12” (on bottom)
[13” x 14”]
HE3XRTR
11” x 34” (on bottom)
[13” x 36”]
11” x 12” (on side)
[13” x 14”]
HE3XRTF
12” x 34” (on side)
[14” x 36”]
11” x 12” (on bottom)
[13” x 14”]
HE3XRTH
12” x 34” (on side)
[14” x 36”]
11” x 12” (on side)
[13” x 14”]
HE-3X_RTV
ROOF
Unit connected to
Return Duct of
nearby AHU.
HE-3X_RTR
Rooftop AHU
ROOF
RTR Unit with dedicated ducts
collecting Room Air.
Fresh Air is ducted into
horizontal return connection
of adjacent AHU.
HE-3X_RTV
ROOF
Stand-alone installation with
independent ducts for
exhaust and supply air.
AHU
Service Area
50 38 "
14 34 "
13 14 "
36
1 4
"
14
1 4
"
52
7 8
"
56
5 8
"
97"
38
1 4
"
4
5 8
"
25.94
54 18 "
10.94
91"
FA
RA
Service Area
