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10
Dimensions
ERV-251, ERV-361, ERV-521, ERV-581
Installation must allow clearance for access to the energy
recovery wheel on the supply side. Minimum clearances
are shown in the table at right. Page 4 shows the side
panel that enables wheel access.
Model
Exterior Dimensions Duct Dimensions
Weight
(lbs.)
A B C D E F G K L Q P
ERV-251 46 34 27 12 8 10 16 6
3
⁄4 7 10 16 340
ERV-361 62 51 34 18 15 18 18 8
3
⁄8 11
1
⁄2 19 18 860
ERV-521 67 67 44 16 15 24 24 10
3
⁄4 13
1
⁄2 26 26 1290
ERV-581 75 70 67 16 22 22 27 16 18
3
⁄4 28 48 1470
All dimensions shown are in inches. Weight assumes outdoor unit with filters, weatherhoods, and supply damper.
Model
Supply Side
Exhaust Side
ERV-251
32
30
ERV-361
44
30
ERV-521
60
40
ERV-581
65
40
All dimensions shown are in inches.
Arrangement A Arrangement B
Arrangement C
Arrangement D
Outdoor Air Discharge
L x K
Outdoor Air Discharge
L x K
Outdoor Air Discharge
L x K
Outdoor Air Inlet
Q x P
Exhaust Air Inlet
F x G
Exhaust Air Inlet
F x G
Exhaust Air Inlet
F x G
Exhaust Hood
Intake Hood
Exhaust Hood
Intake Hood
Exhaust Air Inlet
F x G
Exhaust Hood
Intake Hood
Exhaust Air Discharge
L x K
A
A
A
B
B
B
C
C
C
D
D
E
E
Outdoor Air Discharge
L x K
A
B
C
D
E
Arrangement A
Arrangement C Arrangement D
Arrangement B
Service Clearance