PRODUCT DESCRIPTION

Bosch ProTankless™ GWH 425 EF-N (Natural Gas)

Perfect for situations that require sidewall venting.

The 425 EF has all the durability and performance of the 425 HN, with an added bonus—a built-in power vent. This makes the unit ideally suited for households requiring horizontal, through-the-wall venting only.

• Electronic Ignition
• Built-in Power Vent

PRODUCT 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 NG Gas Pressure 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) Vent Size 4" (single-wall stainless or galvanized

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