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Bosch Tankless Water Heaters - Therm 660 EF
Gas Tankless Water Heaters for smaller residential applications
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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 ½" x 7"
- Weight (lbs.) - 36
- Inlet Connection - ¾" NPT
- Outlet Connection - ¾" NPT
- Gas Connection - ¾" 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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