Wheel Cassette
2 in. filters
2 in. filters
Exhaust Air
Intake
Electrical Box
Access Panel
Access Panel
Access Panel
Access Panel
Access Panel
Cassette
Slides Out
52 in.
Clearance with
IG Heater
0 in.
Clearance without
IG Heater
Exhaust
Hood
Outdoor Air Hood
IG Heater
*48 in. **64 in.
36 in.
36 in.
TOP VIEW
SERVICE CLEARANCES / ACCESS PANEL LOCATIONS for Model ERH
ERH-20, 45, 55, and 90 units require minimum clearances for access on all sides for routine maintenance. Filter
replacement, drain pan inspection and cleaning, energy wheel cassette inspection, fan bearing lubrication and
belt adjustment, are examples of routine maintenance that must be performed. Blower and motor assemblies,
energy recovery wheel cassette, coil and filter sections are always provided with a service door or panel for
proper component access.
Clearances for component removal may be greater than the service clearances,
refer to FIGURES 6 and 7 below for these dimensions.
FIGURE 6
Wheel Cassette
2 in. filters
2 in. filters
Exhaust Air
Intake
Electrical Box
Access Panel
Access Panel
Access Panel
Access Panel
Access Panel
52 in.
Clearance with
IG Heater
0 in.
Clearance without
IG Heater
Exhaust
Hood
Outdoor Air Hood
IG Heater
42 in.
42 in.
42 in.
TOP VIEW
FIGURE 7
6
Clearances for service and component removal on ERH-20 and ERH-45
*Clearance for energy wheel removal on ERH-20.
**Clearance for energy wheel removal on ERH-45.
Clearances for service on ERH-55 and ERH-90
