7
3.2 Combining with an AHU
3.2.1 Recommended configurations
When the distribution of fresh air from the ERV is connected to the return of an AHU (such as in the image below, on the left),
the connection should be done
as close as possible from one AHU return grille
to ensure proper functionning of the built-in
fresh air damper.
3.2.2 Prohibited configurations
Distribution of fresh air from the ERV in the distribution ducting from the AHU (such as in the image below, on the left) may cause
condensation issues during cooling season and must be avoided.
Connecting both distribution of fresh air from the ERV and stale air exhaust in the AHU return ducting (such as in the image
below, on the right) must be avoided.
ERV
AHU
Stale air
to outdoors
with backdraft
damper
Return grille
of AHU
Fresh air
from outdoors
Stale air
from home
VH0114A
Return grille
of AHU
Distribution of
fresh air in AHU
Stale air
from home
ERV
Fresh air
from outdoors
Stale air
to outdoors
with backdraft
damper
AHU supply ducting
and grille to home
AHU
VH0112A
Stale air from home
connected to return
ducting of AHU
Distribution
of fresh air
using plastic grille
AHU
AHU supply ducting
and grille to home
Stale air
to outdoors
with backdraft
damper
Fresh air
from outdoors
VH0113A
ERV
O
PTION
2
O
PTION
1
3 Installation
(cont'd)
ERV
AHU supply ducting
and grille to home
Stale air from home
connected to return
ducting of AHU
Distribution
of fresh air
connected to return
ducting of AHU
Stale air
to outdoors
with backdraft
damper
Fresh air
