SECTION 15: S
PECIFICATIONS
41
15.2 General Technical Data Table
*Do not exceed the maximum length of flue stated or heater may not operate properly.
15.3 Technical Data Table
Model
UHD[X][S][R]
75
UHD[X][S][R]
100
UHD[X][S][R]
125
Full Load Amps @ 115 V
A
1
2
2
Minimum Air Volume
CFM
850
950
1020
Temperature Rise @ Minimum Air Volume
°F (°C)
68 (20)
78 (26)
92 (33)
Heat Exchanger Pressure Drop @ Minimum Air Volume
in wc
0.06
0.05
0.06
Maximum Air Volume
CFM
2650
3660
4750
Temperature Rise @ Maximum Air Volume
°F (°C)
22 (-6)
22 (-6)
20 (-7)
Heat Exchanger Pressure Drop @ Maximum Air Volume
in wc
0.36
0.55
0.98
Flue Size/Air Intake**
in (cm)
4 (10)-All models
Model
UHD[X][S][R]
75
UHD[X][S][R]
100
UHD[X][S][R] 125
Total Input
(Btu/h) x (1000)
75
100
125
Total Output
(Btu/h) x (1000)
61.5
82
102.5
Efficiency
%
82-All models
Natural Gas (G20) Data - Inlet Pressure 5.0 in wc Min., 14 in wc Max.
Burner Pressure
in. wc
3.5
2.6
3.3
LPG / Propane (G31) Data - Inlet Pressure 12.0 in wc Min., 14 in wc Max.
Burner Pressure
in. wc
10.0
9.1
10.0
