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| GWH 425 EF Technical Support |
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| Technical Specifications |
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| Technical Specifications |
| Power Input |
NG: 28,000 - 130,000 Btu
LP: 28,000 - 125,000 Btu |
Minimum Flow
Rate to Activate |
0.5 gallons per minute (gpm) |
| Flow Rates |
90° F rise / 2.3 gpm
75° F rise / 2.7 gpm
65° F rise / 3.3 gpm
55° F rise / 3.8 gpm
45° F rise / 4.6 gpm |
| Energy Factor |
NG: .78
LP: .81 |
| Thermal Efficiency |
NG: 80%
LP: 82% |
| Dimensions |
29¾"h x 18¼'w x 8¾”d |
| Weight |
44 lbs. |
| Ignition |
Electric |
| Accessories |
Horizontal Vent Terminator - FXHOOD (FXHOOD required) |
| Modulating Gas Valve |
Yes |
| Life Expectancy |
20+ years |
| Installation Specifications |
| Gas Connection |
½" Male NPT |
| Water Connection |
½" Male NPT |
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NG Gas Pressure
LP Gas Pressure
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Minimum: 7" WC
Maximum: 14 " WC
Minimum: 11" WC
Maximum: 14" WC |
| Water Pressure |
Minimum: 18 PSI
Maximum: 150 PSI |
| Electrical Supply |
120 volts/1.2 amps (plugs in) |
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Vent Size |
4" (single-wall stainless or galvanized) |
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