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Healthy Climate
®
HRV/ERV Ventilators
Units with Dual Hood Kit
The Dual Hood Kit (Y3813) offers the benefit of requiring
only one 6˜ hole in the exterior wall to complete the connec-
tions for fresh air intake and stale air exhaust. The pres-
sure drop/airflow charts should be referred to when match-
ing the Dual Hood to the HRV / ERV.
Equipment Performance with the Dual Hood
These charts and table illustrate the External Static Pres-
sure (ESP) and the corresponding airflows of Lennox
HRVs and ERVs, when using the Dual Hood in the system.
Perform all calculations for duct sizing in the usual manner
(taking into account measured and equivalent lengths).
Model
Airflow (cfm) See Note
Compatible
with Dual
Hood?
0.3
0.4
0.5
HRV3−150−TPD
115
104
95
Yes
HRV3−150−TPF
120
107
100
Yes
HRV3−095
66
60
n/a
Yes
HRV4−150
90
80
72
Yes
HRV4−200
120
107
100
Yes
HRV3−195
125
114
107
Yes
HRV3−300
n/a
n/a
n/a
NO
ERV3−150
107
98
81
Yes
ERV3−200
125
118
101
Yes
Note Normal system design ESP is 0.3 to 0.5
Component Rating
All plastic components are rated UL 94V−0.
Foam components are rated 5/50 Flame
spread/smoke development.
IMPORTANT
Contact your local building authority be-
fore installation of the Dual Hood kit to
verify compliance with local building
codes.
Refer to the installation instruction
(507040−01) which come with the Dual Hood
for complete installation instructions.
Stale Air
Exhaust
Fresh Air
Intake
6 (152)
6 (152)
8 (203)
8.25 (210)
13 (330)
6
(152)
5 (127)
21.5 (546)
25 (635)
SIDE VIEW
TOP VIEW
inches (mm)
Figure 18. Dual Hood Dimensions and ratings
