29
• AFTER installing the weatherhood, its outside perime-
ter must be sealed with exterior caulking
• To be installed in accordance with local building codes
or manufacturer recommendations.
WEATHERHOODS
Fixed covered weatherhoods have a built−in bird screen
with a ¼” (6 mm) mesh to prevent foreign objects from en-
tering the 12” (305 mm) insulated ducting labeled SUPPLY
and EXHAUST.
Table 15. Fixed Covered Weatherhoods
Size
Catalog Number
5” (127 mm)
92E66
6” (152 mm)
95P07
7” (203 mm)
17N11
SCREEN
(side view)
EXTERIOR
1/4" (6 mm)
SCREEN
(front view)
36" (1 m) min.
recommended
OUTSIDE
CORNER
INSIDE
CORNER
18" (460 mm) min. recommended
SUPPLY
EXHAUST
Collar is supplied to ensure vapor barrier
is 100% seal to wall plate.
12” (305 mm) galvanized
pipe supplied
Figure 31. Typical Weatherhood Installation
CAUTION
Potential equipment malfunction or damage.
May require repairs and/or void warranty.
Snow accumulation may block airway of weatherhoods.
Install intake and exhaust weatherhoods at least 18
inches (457 mm) above the ground or above the depth of
expected snow accumulation.
Local codes may require a minimum distance between
openings.
1.
Thermal collar slides over galvanized sleeve of
weatherhood.
2.
Fasten thermal collar to belt.
3.
Slide insulated flexible or rigid ducting over the
galvanized sleeve of the weatherhood and fasten to the
thermal collar.
4.
Hood is hinged to allow for easy access for cleaning
screen.
H/C ERV/HRV Dual Hood Kit (Y3813)
The H/C ERV/HRV Dual Hood Kit (Y3813) offers the benefit
of requiring only one 6˜ (152 mm) hole in the exterior wall
to complete the connections for fresh air intake and stale
air exhaust. The pressure drop/airflow charts should be re
-
ferred to when matching 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 ERV
and HRV models, 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).
Table 16. Blower Data with Optional Dual Hood
Model No.
Airflow in CFM & L/S at Nominal External Static Pressure
Compatible with dual hood
0.3
75
0.4
100
0.5
125
(in. w.g.)
(Pa)
(in. w.g.)
(Pa)
(in. w.g.)
(Pa)
HRV3-150-TPD
124
58
116
54
107
50
YES
HRV3-195
135
63
123
58
108
51
YES
HRV5-150
116
54
102
48
87
41
YES
HRV5-200-TPD
N/A
N/A
138
65
129
61
NO @ 0.3 in. w.g.
HRV6-HEX095-TPD
87
41
80
38
72
34
YES
HRV5-270-TPD-ECM
N/A
N/A
N/A
N/A
N/A
N/A
NO
ERV5-130
118
55
113
53
109
51
YES
ERV5-150-TPD
124
58
116
54
108
51
YES
ERV5-175-TPD
N/A
N/A
133
62
125
59
NO @ 0.3 in. w.g.
Summary of Contents for ERV5-130
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