4
Figure 3: Roofcurb detail for ERV1300 RT-EC
INSTALLATION
The unit may be secured to a metal or wooden curb fastened to the roof. If securing the unit to the curb is required, fasteners and isolators may be
used at the mounting points on the frame protruding from the unit (all mounting hardware is field supplied and specified).
Roofcurb
Care must be exercised in locating the roof opening and in all cases a structural engineer should confirm location of the unit on the roof. The HVAC
system should cross enough roof supports to safely distribute the weight of the system over the roof. The ERV Series air duct sizes can be found in
Figures 3 & 4. Roofcurb may be supplied by others. Assemble and install accessory roofcurb in accordance with instructions shipped with the curb.
See Figures 3 & 4 for curb dimensions.
The gasketing of the unit to the roofcurb is critical for a watertight seal. Gasket is factory installed to the bottom of the unit. Ensure gasket has not
been disturbed during shipping. An improperly applied gasket can result in water leaks and poor unit performance.
Ductwork must be attached to the roofcurb, or self supported. They are not to be attached to the unit.
The roofcurb for the ERV series should be level. Consult with local authorities or your local building code for minimal intake hood height from the roof.
This code will determine the height of the roofcurb. See Figures 3 & 4 for typical unit dimensions.
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
Figure 2: Roofcurb assembly
*NOTE: Standard curb heights
are 12” (305mm), 18”
(475mm), 24” (610mm)
**NOTE: Drawings are not
to scale
Bottom View
Electrical Wire Channel
562
268
229
1252
457
1186
681
634
77.8
767
25.4
Supply Air Opening
Return Air Opening
597
40
76
513
336
296
110
98.3
