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HM750A1000
SIZING
IMPORTANT
The HM750 should only be installed if it has been
sized properly. Do not use square feet when sizing
a humidifier installation. Instead, cubic feet must
be used, since the humidity is filling a volume of
space (width x length x height). Also, take into
consideration the "tightness" of a home's
construction.
Construction
Type
8,000 ft
Tight
3.3
Average
6.7
Loose
10.0
Construction
Type
8,000 ft
Tight
11 GPD
Average
11 GPD
Loose
11 GPD
a
In the table above, 11 GPD indicates a steam humidifier configured to run on 120 V and 22 GPD indicates a steam
humidifier configured to run on 240 V.
33-00289EF—05
Table 3. AHRI Recommended Humidity (in US gallons per day).
3
3
12,000 ft
16,000 ft
5.0
6.7
10.0
13.4
15.0
20.0
Table 4. Steam humidifier(s) necessary for application.
3
3
12,000 ft
16,000 ft
11 GPD
11 GPD
11 GPD
22 GPD
22 GPD
22 GPD
The HM750 produces 11 gallons per day (GPD) when run
on 120 V and 22 GPD when run on 240 V. See Figure 20
for details on configuring the HM750 to run on a different
voltage.
Table 3 contains AHRI recommendations for humidity
requirements and Table 4 shows what humidifiers and
output configuration will satisfy the humidification
requirements.
3
3
20,000 ft
24,000 ft
8.3
10.0
16.7
20.0
25.0
30.1
3
3
20,000 ft
24,000 ft
11 GPD
11 GPD
22 GPD
22 GPD
11 GPD (x4)
11 GPD (x4)
or
or
22 GPD (x2)
22 GPD (x2)
4
3
3
32,000 ft
40,000 ft
13.4
16.7
26.7
33.4
40.1
50.1
a
3
3
32,000 ft
40,000 ft
11 GPD (x2)
11 GPD (x2)
or
or
22 GPD (x1)
22 GPD (x1)
11 GPD (x4)
11 GPD (x4)
or
or
22 GPD (x2)
22 GPD (x2)
11 GPD (x4)
11 GPD (x5)
or
or
22 GPD (x2)
22 GPD (x3)
3
3
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