A. O. Smith Commercial Water Heater Manuals
Select your A. O. Smith model number below for installation steps, settings, maintenance schedules, troubleshooting and the full specification sheet. Your model number is printed on the rating plate.
A. O. Smith commercial water heaters by model number
| Model | Description | Certified |
|---|---|---|
| AHPA060Emerge-X | commercial heat pump water heater | September 2024 |
| AHPA060-208Emerge-X | commercial heat pump water heater | December 2025 |
| AHPA060-480Emerge-X | commercial heat pump water heater | December 2025 |
| AHPA140Emerge-X | commercial heat pump water heater | September 2024 |
| AHPA140-208Emerge-X | commercial heat pump water heater | December 2025 |
| AHPA140-480Emerge-X | commercial heat pump water heater | December 2025 |
| AHPA200Emerge-X | commercial heat pump water heater | September 2024 |
| AHPA200-208Emerge-X | commercial heat pump water heater | December 2025 |
| AHPA200-480Emerge-X | commercial heat pump water heater | December 2025 |
| AHPA280Emerge-X | commercial heat pump water heater | September 2024 |
| AHPA280-208Emerge-X | commercial heat pump water heater | December 2025 |
| AHPA280-480Emerge-X | commercial heat pump water heater | December 2025 |
| AHPA350Emerge-X | commercial heat pump water heater | September 2024 |
| AHPA350-208Emerge-X | commercial heat pump water heater | December 2025 |
| AHPA350-480Emerge-X | commercial heat pump water heater | December 2025 |
| ATX-199-*-1 | 119-gallon commercial gas storage water heater | November 2021 |
| BSS 130 2Polaris | 34-gallon commercial gas storage water heater | November 2021 |
| BTH 120* 3 | 60-gallon commercial gas storage water heater | November 2021 |
| BTH 150* 3 | 100-gallon commercial gas storage water heater | November 2021 |
| BTH 199* 3 | 100-gallon commercial gas storage water heater | November 2021 |
| BTH 250* 3 | 100-gallon commercial gas storage water heater | November 2021 |
| BTH 251* 3 | 119-gallon commercial gas storage water heater | November 2021 |
| BTH 300* 3 | 119-gallon commercial gas storage water heater | November 2021 |
| BTH 400* 3 | 119-gallon commercial gas storage water heater | November 2021 |
| BTH-100* 4 | 60-gallon commercial gas storage water heater | August 2025 |
| BTH-120* 4 | 60-gallon commercial gas storage water heater | August 2025 |
| BTH-145* 4 | 60-gallon commercial gas storage water heater | August 2025 |
| BTH-150* 4 | 100-gallon commercial gas storage water heater | August 2025 |
| BTH-199* 4 | 100-gallon commercial gas storage water heater | August 2025 |
| BTH-250* 4 | 100-gallon commercial gas storage water heater | August 2025 |
| BTH-251* 4 | 119-gallon commercial gas storage water heater | August 2025 |
| BTH-300* 4 | 119-gallon commercial gas storage water heater | August 2025 |
| BTH-400* 4 | 119-gallon commercial gas storage water heater | August 2025 |
| BTH-500* 4 | 119-gallon commercial storage-type instantaneous gas water heater | August 2025 |
| BTHS 1000A 1 | 120-gallon commercial storage-type instantaneous gas water heater | August 2026 |
| BTHS 750A 1 | 120-gallon commercial storage-type instantaneous gas water heater | August 2026 |
| BTS 130 2Polaris | 50-gallon commercial gas storage water heater | November 2021 |
| BTS 150 2Polaris | 50-gallon commercial gas storage water heater | November 2021 |
| BTS 175 2Polaris | 50-gallon commercial gas storage water heater | November 2021 |
| BTS 199 2Polaris | 50-gallon commercial gas storage water heater | November 2021 |
| BTX-100 3 | 50-gallon commercial gas storage water heater | November 2021 |
| BTX-100 4 | 50-gallon commercial gas storage water heater | August 2025 |
| BTX-80 1BTX 80 120 | 50-gallon commercial gas storage water heater | November 2021 |
| BTXL-100 3 | 75-gallon commercial gas storage water heater | November 2021 |
| BTXL-100 4 | 75-gallon commercial gas storage water heater | August 2025 |
| CAHP2CO-6EMERGE-xc | commercial heat pump water heater | February 2026 |
| CAHP3CO-6EMERGE-xc | commercial heat pump water heater | February 2026 |
| GSP 130 2Polaris | 34-gallon commercial gas storage water heater | November 2021 |