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Discontinued Gas Tankless Water Heaters
| Therm C1210 ES/EC for S/N 212 & lower |
| Therm C1050 ES for S/N 202-212 |
| Therm C1050 ES for S/N 201 & lower |
| Therm C950 ES for S/N 202-212 |
| Therm C950 ES for S/N 201 & lower |
| Therm C940 ES for S/N 202-212 |
| Therm C940 ES for S/N 201 & lower |
| Therm 940 ESO |
| Therm 940 ESO |
| Therm 940ESO for S/N 202-212 |
| Therm 940ESO for S/N 201 & lower |
| Therm 830ES for S/N 202-212 |
| Therm 830ES for S/N 201 & lower |
| Therm 660 EF/EFO |
| Therm 660 EF/EFO - Spanish |
| Therm 660 EF/EFO - French |
| Therm 660 EF/EFO |
| Therm 660 EF |
| Therm 660 EFO |
| Therm 520 PN |
| Therm 330 PN |
| Therm 520 HN |
| GWH C 920 ES/ESC |
| GWH 715 ES High Altitude |
| GWH 800 ES High Altitude |
| GWH 635 ES |
| GWH 450 ES |
| GWH 345/450 ESR |
| GWH 425 HN - S/N 686 & Higher |
| GWH 425 HN - S/N 685 & Lower |
| GWH 425 HN - Spanish |
| GWH 425 HN - French |
| GWH 425 HNO |
| GWH 425 EF |
| GWH 425 PN |
| GWH 425 PN - French |
| GWH 425 PN - Spanish |
| GWH 260 PN |
| Pipe Cover |
| GWH 345/450 ESC |
| Tankless & Point of Use |
| Cascading Kit |
| AQ1 Power Vent Kit for GWH 425 HN S/N 685 & Lower |
| AQ4 Horizontal Vent Kit for GWH 425 HN S/N 686 & Higher |
| Stainless Steel Concentric Venting |
| PVC Concentric Venting |
| Pro Tankless Outdoor Kit |
| Therm 660 EF/EFP Gas Conversion |
| Therm EF/EFO Pipe Cover |
| Therm 660/EFO Recess Box |
| Therm Water Filter Kit |
| 520 HN / GWH 425 HN |
Bosch GWH Tankless Models
| GWH 2700 ES |
| GWH 2400 ES |
| GWH 1600 P |
| GWH 1600 PS |
| GWH 1600 H |
| GWH 1000 P |
| AQ3 Z-Vent (Z-Flex SVE Series III) |
| 3" Vent Kit-GWH 2700 ES, GWH 2400 ES |
| AQ4 Vent Kit-GWH 1600P, GWO 1600H |
| AQOK Outdoor Kit-GWH 2700 ES, GWH 2400 ES |
Bosch AquaStar Models
| 38B |
| 125B (Newer one port) |
| 125B (Older two port) |
| 125BL |
| 125BO |
| 125BS |
| 125FX |
| 125FX (older one port) |
| 125FX (older two port) |
| 125HX |
| 125HX (older one port) |
| 125HX (older two port) |
| 125X |
| 80VP |
| 125VP |
| 170VP |
| 240FX |
| 250 SX |
| 250 SXO |
| 250 SX Z-Vent |
| 2400E |
| 2400EO |
| AQ-1 Power Vent Kit |
| Ecotherm |
ProTL Series
| ProTL 175 |
| ProTL 175 |
| ProTL 199 |
| ProTL 199 |
| ProTL 175C/199C |
| ProTL 175C/199C |
Determining the elevation limit of your 345/450 ESR or 715/C 800 ES
- FD Code 886 or lower - unit approved for elevations up to 4,500'
- FD Code 887-891 - NG unit approved for elevations up to 8,000'
- FD Code 887-891 - LP unit approved for elevations up to 4,500'
- FD Code 892 or higher - LP and NG units approved for elevations up to 8,000'