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Model ERV Energy Recovery Unit
Intake Hood
Exhaust
Hood
Cassette slides out*
Access Panels
Access Panel
Access Panel
Cassette slides out*
Access Panels
Access Panels
Exhaust
Side
Outdoor
Air Side
Exhaust
Side
Outdoor
Air Side
Service Clearances
ERV-251, 361, 521 and 581 units require minimum clearances to perform routine maintenance, such as filter
replacement, energy wheel cassette inspection, and fan belt adjustment. Blower and motor assemblies,
energy recovery wheel cassette 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
drawings below for these dimensions.
ERV-251, ERV-361, ERV-521, ERV-581 ERV-522, ERV-582
Intake Hood
Exhaust
Hood
Cassette slides out*
Access Panels
Access Panel
Access Panel
Cassette slides out*
Access Panels
Access Panels
Exhaust
Side
Outdoor
Air Side
Exhaust
Side
Outdoor
Air Side
Recommended Service Clearances
Unit Size R S T X
ERV-251 32 30 30
ERV-361
44
(30 for maintenance)
30 30
ERV-521
60
(39 for maintenance)
40 40
ERV-581
65
(32 for maintenance)
40 40
ERV-522 38
ERV-582 42
All dimensions are in inches.
Arrangement A
Arrangement B, C or D
T
T
R
S
Arrangement A
Cassette
Cassette
Access PanelAccess Panel
Access Panel
Access Panel
X
X
X
X
Cassette
Cassette
Supply
Weatherhood
Exhaust
Weatherhood
Access PanelAccess Panel
Access PanelAccess Panel
Access Panel
Arrangement B, C or D
X
*ERV-251, 361, and 521 only.
*ERV-251, 361, and 521 only.
R
X
X
X