American Water Heater Manuals
Select your American model number below for installation steps, settings, maintenance schedules, troubleshooting and the full specification sheet. Your model number is printed on the rating plate.
American water heaters by model number
| Model | Description | Certified |
|---|---|---|
| GT-240-NEH 1T-H3J-OS-N | 160,000 Btu/h natural gas tankless water heater | February 2023 |
| GT-240-PEH 1*1T-H3J-OS-N | 160,000 Btu/h propane tankless water heater | February 2023 |
| GT-240X3-NEH 1T-H3J-OS-N | 160,000 Btu/h natural gas tankless water heater | February 2023 |
| GT-240X3-PEH 1*1T-H3J-OS-N | 160,000 Btu/h propane tankless water heater | February 2023 |
| GT-340-NIH 1T-H3S-DV-N | 180,000 Btu/h natural gas tankless water heater | February 2023 |
| GT-340-PIH 1*1T-H3S-DV-N | 180,000 Btu/h propane tankless water heater | February 2023 |
| GT-340X3-NIH 1T-H3S-DV-N | 180,000 Btu/h natural gas tankless water heater | February 2023 |
| GT-340X3-PIH 1*1T-H3S-DV-N | 180,000 Btu/h propane tankless water heater | February 2023 |
| GT-540-NEH 1T-H3-OS-N 1** | 199,000 Btu/h natural gas tankless water heater | February 2023 |
| GT-540-PEH 1*1T-H3-OS-N 1** | 199,000 Btu/h propane tankless water heater | February 2023 |
| GT-540P-NEH 1T-H3-OS-N 1** | 199,000 Btu/h natural gas tankless water heater | February 2023 |
| GT-540P-PEH 1*1T-H3-OS-N 1** | 199,000 Btu/h propane tankless water heater | February 2023 |
| GT-540X3-NEH 1T-H3-OS-N 1** | 199,000 Btu/h natural gas tankless water heater | February 2023 |
| GT-540X3-PEH 1*1T-H3-OS-N 1** | 199,000 Btu/h propane tankless water heater | February 2023 |
| HPA10240H045DV 2 | 36-gallon heat pump water heater | December 2025 |
| HPA10250H045DV 2 | 46-gallon heat pump water heater | December 2025 |
| HPA10266H045DV 2 | 68-gallon heat pump water heater | December 2025 |
| HPA10280H045DV 2 | 81-gallon heat pump water heater | December 2025 |
| HPHE10250H045DVCTA-1 | 46-gallon heat pump water heater | February 2023 |
| HPHE10250H045DVDR 1 | 46-gallon heat pump water heater | February 2023 |
| HPHE10250H045DVN 1 | 46-gallon heat pump water heater | February 2023 |
| HPHE10266H045DVCTA-1 | 67-gallon heat pump water heater | February 2023 |
| HPHE10266H045DVDR 1 | 67-gallon heat pump water heater | February 2023 |
| HPHE10266H045DVN 1 | 67-gallon heat pump water heater | February 2023 |
| HPHE10280H045DVCTA-1 | 82-gallon heat pump water heater | February 2023 |
| HPHE10280H045DVDR 1 | 82-gallon heat pump water heater | February 2023 |
| HPHE10280H045DVN 1 | 82-gallon heat pump water heater | February 2023 |
| HPHE6250H045DV 1 | 46-gallon heat pump water heater | February 2023 |
| HPHE6266H045DV 1 | 67-gallon heat pump water heater | February 2023 |
| HPHE6280H045DV 1 | 82-gallon heat pump water heater | February 2023 |
| HPS10250H045DV 2 | 46-gallon heat pump water heater | December 2025 |
| HPS10266H045DV 2 | 67-gallon heat pump water heater | December 2025 |
| HPS10280H045DV 2 | 82-gallon heat pump water heater | December 2025 |
| HPV10250H009DV 2 | 46-gallon 120-volt heat pump water heater | December 2025 |
| HPV10266H009DV 2 | 68-gallon 120-volt heat pump water heater | December 2025 |
| HPV10280H009DV 2 | 82-gallon 120-volt heat pump water heater | December 2025 |
| MCT-199O-N 1T-H3-OS-N 1** | 199,000 Btu/h natural gas tankless water heater | February 2023 |
| MCT-199O-P 1*1T-H3-OS-N 1** | 199,000 Btu/h propane tankless water heater | February 2023 |
| MCTH-199M-(N,P) 1 | 199,000 Btu/h gas tankless water heater | July 2026 |
| MHPCO-45 1**+MXST-50LBTTP 1 | 48-gallon split-system heat pump water heater | February 2026 |
| MHPCO-45 1**+MXST-50S 1 | 46-gallon split-system heat pump water heater | February 2026 |
| MHPCO-45 1**+MXST-50STTP 1 | 46-gallon split-system heat pump water heater | February 2026 |
| MHPCO-45 1**+MXST-50T 1 | 45-gallon split-system heat pump water heater | February 2026 |
| MHPCO-45 1**+MXST-50TTTP 1 | 45-gallon split-system heat pump water heater | February 2026 |
| MHPCO-45 1**+MXST-66 1 | 60-gallon split-system heat pump water heater | February 2026 |
| MHPCO-45 1**+MXST-66TTP 1 | 60-gallon split-system heat pump water heater | February 2026 |
| MHPCO-45 1**+MXST-80 1 | 73-gallon split-system heat pump water heater | February 2026 |
| MHPCO-45 1**+MXST-80TTP 1 | 73-gallon split-system heat pump water heater | February 2026 |