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Bosch (635 ES)

A Gas tankless water heater with direct vent room-sealed combustion and capacity to supply two showers running simultaneously.

Features:

The 635 ES requires no special tools to install or maintain. And its compact size and sealed combustion enables installation in small spaces. A built-in power vent makes both vertical and horizontal venting possible while the electronic ignition maximizes energy efficiency. This unit yields enough power to supply two showers simultaneously and features an adjustable temperature control for improved comfort.

  • Direct Vent Room Sealed Combustion.
  • Saves up to 50% off utility costs.
  • 15-year warranty.
  • 87% efficiency rating.
  • Delivers over 6 gallons per minute.
  • 3" vent and air inlet connections.
  • Provides an ENDLESS supply of hot water
  • Uses state-of-the-art, 21st century water heating technology.
  • Smaller than a suitcase - Weighs just 47 pounds.
  • Digital thermostat to set desired output.
  • Electronic ignition - Plugs into 12ov (no standing pilot).
  • Can vent air vertically or horizontally.

 
Specifications:

  • BTU Input:             175,000 (51.2 kW)

  • Energy Factor:        0.85

  • Average Efficiency:  86.5% (recovery efficiency)

  • Ignition:                 Electronic

  • Voltage:                 120 VAC 50/60 Hz

  • Exhaust Vent Size:    3"

  • Combustion Air Pipe Size:  3"

Exhaust Venting

  • Diameter:                       3 inch

  • Material:                        Stainless Steel (AL29-4C) sealed

  • Minimum length:               3 ft.

  • Maximum length: 26 ft. (8m) with one 90 degree elbow.
    Less 2.5 ft. for each additional 90 degree elbow (1.25 ft for each 45 degree elbow)

Intake Venting
(Room-sealed installation)

  • Diameter:                    3 inch

  • Material:                     PVC, Aluminum or Galvanized

  • Maximum length:           26 ft. (8m) with one 90 degree elbow.
    Less 2.5 ft. for each additional 90 degree elbow (1.25 ft for each 45 degree elbow)

Flow Rate

  • Minimum Flow Rate:         .8 gpm (3 l/m)

  • Activation:                     .8 gpm (3 l/m)

Capacity
 

  • 90 F rise / 3.1 gpm

  • 80 F rise / 3.5 gpm

  • 70 F rise / 4.0 gpm

  • 60 F rise / 4.7 gpm

  • 50 F rise / 5.7 gpm

  • 45 F rise / 6.35 gpm

Weight   47 lbs. (21 kg)

Optional Accessories

Horizontal Vent Kit
Wireless Remote Control
Isolation Water Valves

 

 

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Last modified: March 01, 2017