Bosch GWH-425-HN-L Tankless Water Heater, Indoor Use

Product Description

Bosch GWH-425-HN-L Tankless Water Heater, Indoor Use

Ideal for households looking to maximize energy savings. New homeowners want the energy-efficient, endless supply of hot water only a gas tankless water heater can deliver. And no one has a more complete line or gives you a longer warranty than Pro Tankless by Bosch. Elegantly engineered, these units are small, lightweight, and easy to install and maintain.

Patented Bosch Hydro-Generated Ignition Technology. The Bosch engineers have proven that water can indeed make fire. The pilot is ignited by a super-concentrated spark generated by a micro-turbine. The micro-turbine is activated by a request for hot water in the house. This energy efficient technology makes the 425 HN ideal for households looking to maximize energy savings.

Bosch GWH-425-HN-L Tankless Water Heater, Indoor Use Features:
• Hydro-generated ignition
• 80% average efficiency
• Venting: 5" double-wall type B vent - natural draft
• Modulating gas valve - constant temperature at varying flow rates
• Available in natural gas (NG) or liquid propane (LP)
• 15-year warranty
• No Electricity Required

Bosch GWH-425-HN-L Tankless Water Heater, Indoor Use Specifications:
• Gas Type: LP (Liquid Propane)
• Power Input -
 o NG: 28,000 - 117,000 Btu
 o LP: 28,000 - 117,000 Btu
• Minimum Flow Rate to Activate - 0.5 gallons per minute (gpm)
• Flow Rates -
 o 90° F rise / 2.1 gpm
 o 75° F rise / 2.4 gpm
 o 65° F rise / 2.9 gpm
 o 55° F rise / 3.4 gpm
 o 45° F rise / 4.2 gpm
• Energy Factor -
 o NG: .85
 o LP: .84
• Thermal Efficiency -
 o NG: 80%
 o LP: 83%
• Dimensions - 29¾"h x 18¼'w x 8¾"d
• Weight - 40 lbs.
• Ignition - Hydro-generated
• Life Expectancy - 20+ years
• Optional Accessories - Power Vent Kit - AQ1
• Modulating Gas Valve - Yes
• Gas Connection - ¾" Male NPT
• Water Connection - ½" Male NPT
• LP Gas Pressure - Minimum: 7" WC, Maximum: 14 " WC
• NG Gas Pressure - Minimum: 11" WC, Maximum: 14" WC
• Water Pressure - Minimum: 30 PSI, Maximum: 150 PSI
• Electrical Supply - None
• Vent Size - 5" (double-wall type B)

* On a combustible wall surface the unit should be mounted away from the wall to provide adequate clearance of the vent pipe.

* Not approved for use in mobile homes, boats, or RVs.

Product Details and Features

• Manufacturer and Model: Bosch GWH-425-HN-L

Downloadable Product Documents