Bosch boilers
16 boilers listed under Bosch.
| Model | AFUE | Costs to run |
|---|---|---|
| SINGULAR 5200 | 95.00 | $24.45 per million BTU of heat |
| SINGULAR 4000 | 95.00 | $24.45 per million BTU of heat |
| ZWB 42-3 | 95.00 | $24.45 per million BTU of heat |
| ZWB 35-3 | 95.00 | $24.45 per million BTU of heat |
| ZWB 28-3 | 95.00 | $24.45 per million BTU of heat |
| ZBR 42-3 | 95.00 | $24.45 per million BTU of heat |
| ZBR 35-3 | 95.00 | $24.45 per million BTU of heat |
| ZBR 28-3 | 95.00 | $24.45 per million BTU of heat |
| ZBR 21-3 | 95.00 | $24.45 per million BTU of heat |
| KWB 42-3 | 95.00 | $24.45 per million BTU of heat |
| KWB 35-3 | 95.00 | $24.45 per million BTU of heat |
| KWB 28-3 | 95.00 | $24.45 per million BTU of heat |
| KBR 42-3 | 95.00 | $24.45 per million BTU of heat |
| KBR 35-3 | 95.00 | $24.45 per million BTU of heat |
| KBR 28-3 | 95.00 | $24.45 per million BTU of heat |
| KBR 21-3 | 95.00 | $24.45 per million BTU of heat |
Computed from electricity at 18.34¢/kWh, the EIA average for US in June 2026 and gas at $24.09/Mcf for June 2026. A kilowatt-hour is 3412 BTU. Gas volume is converted to heat at 1.037 million BTU per thousand cubic feet, EIA's published average. This is a rate times a rating, not a prediction of your bill.
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Source: ENERGY STAR certified product data, published by the U.S. EPA and used with attribution. This is a register of certified models, not of every model on the market. ENERGY STAR is a registered mark of the U.S. EPA; this site is not affiliated with or endorsed by EPA or DOE.