Select a Product
- Geothermal Heat Pumps
- Residential Product Offering
- Commercial Product Offerings
- Geothermal Tax Credits
- Calculate your own savings!
- Why Geothermal?
- Gas, Oil, and Condensing Boilers
- Gas Tankless Water Heaters
- Electric Water Heaters
- Heat Pump Water Heater
- Solar Thermal System
- Storage Tanks for Backup
Gas Tankless Water Heaters
Therm 940 ES
Energy Efficient
High capacity, non-condensing tankless technology
Therm 940 ES
Product Overview
The 940 ES, our highest capacity non-condensing model was designed to meet the demands of busy households, and offers premium features you expect from Bosch. This model can be installed almost anywhere thanks to its sealed combustion and dual-fan technology.
Features & Benefits
- Highest capacity non-condensing model
- 83%+ thermal efficiency
- 199,000 BTU maximum input
- 9.4 gallons per minute capacity at 35F degree rise
- Minimum activation flow rate of 0.5 gallons per minute
- Electronic ignition and patented burner design
- Exclusive safety and precision controls
- Vents vertically or horizontally with 3” or 4” stainless steel
- Can be used in solar thermal, recirculation applications
- Built for durability and serviceability with 15-year warranty and 20+ year life expectancy
- Available in NG and LP models
- Also available as an outdoor model, 940 EFO
- Mobile home certified
Warranty
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
5 year warranty on all other parts
Bosch Warranty Details
| Therm 940 ES | Specifications |
|---|---|
| Condensing/Non-Condensing | Non-Condensing |
| Application | Residential or Commercial |
| Max Input (BTU) | 199,000 |
| Min Input (BTU) | 19,900 |
| Capacity at 35°F Rise (gpm) | 9.4 |
| Capacity at 55°F Rise (gpm) | 6.0 |
| Intelligent Cascading | Yes |
| Min Flow Rate | 0.50 gpm |
| Temp Range (°F) | 100 - 140 |
| Temp Stability (°F) | +/-2 |
| Default Temp (°F) | 122 |
| Energy Factor | .83 |
| Thermal Efficiency | 83% |
| Installation Options | Indoor or Outdoor (for outdoor, kit required) |
| Dimensions (w x h x d) | 17 7/8" x 30½" x 11¼" |
| Weight (lbs.) | 67 |
| Inlet Connection | ¾" NPT |
| Outlet Connection | ¾" NPT |
| Gas Connection | ¾" NPT |
| Max Water Pressure | 150 psi |
| Min Water Pressure | 30 psi |
| Min NG Presure | 3.5" WC |
| Condensing Heat Exchanger | n/a |
| Venting Options | Stainless Steel |
| Vent Maximun Run | 61¼' |
| Energy Star Rated | Yes |
| For models C 1210 ES/ESC : 35°F capacity is based on installation with a mixing valve to overcome typical pressure loss through the water heater and system. | - |