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PH1682
Bosch Tankless Water Heaters - Therm 660 EF

Gas Tankless Water Heaters for smaller residential applications

Retail Prices are shown - once you have an account -
then you can see Pro Pricing  Click here for more info!
Bosch 660 EF Gas Tankless Water Heaters Specs:
  • Type - Non-Condensing
  • Application - Residential
  • Max Input (BTU) - 140,000
  • Min Input (BTU) - 20,000
  • Capacity at 35 (°F) Rise (gpm) - 6.6
  • Capacity at 55(°F) Rise (gpm) - 4.2
  • Intelligent Cascading - No
  • Min Flow Rate - 0.5 gpm
  • Temp Range (°F) - 100 to 160
  • Temp Stability (°F) - +/- 2 °
  • Default Temp (°F) - 120
  • Energy Factor - 82%+
  • Thermal Efficiency - 83%+
  • Installation Options - Indoor
  • Dimensions (w x h x d) - 14" x 20 " x 7"
  • Weight (lbs.) - 36
  • Inlet Connection - " NPT
  • Outlet Connection - " NPT
  • Gas Connection - " NPT
  • Max Water Pressure - 150 psi
  • Min Water Pressure - 13 psi
  • Min NG Presure - 4" WC
  • Venting Options - Stainless Steel CAT III
  • Vent Maximun Run - 35 feet
  • Energy Star Rated - Yes


Bosch 660 EF Gas Tankless Water Features:
  • Outdoor installation with freeze protection
  • 83%+ thermal efficiency
  • 140,000 BTU maximum input
  • 6.6 gallons per minute capacity at 35F degree rise
  • Electronic ignition
  • Can be used in recirculation and space heating applications
  • Minimum activation flow rate of 0.5 gallons per minute
  • 15 year limited warranty on heat exchanger; 3 year warranty if used in direct recirculating applications
  • 15 year warranty on heat exchanger if used if recirculated through a storage tank such as the Ariston mini-tank
  • Warranty 5 years on all other parts
  • Available in NG and LP models

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then you can see Pro Pricing  Click here for more info!



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