American ATHR-160M 1 (MTHR-160M 1)
American ATHR-160M 1 (MTHR-160M 1) is a gas tankless water heater from American rated 4.8 GPM at a 0.95 UEF.
| Uniform Energy Factor (UEF) | 0.95 |
|---|---|
| Annual gas use (natural gas) | 178 therms/yr |
| Recovery efficiency | 98 % |
| Annual propane use | 194.53 gal/yr |
| Fuel | Natural Gas, Propane |
|---|
| Max flow rate | 4.8 GPM |
|---|---|
| Draw pattern | High |
| Minimum activation flow | 1 GPM |
| Gas input rate | 160 kBTU/h |
|---|
| Max current draw | 5 A |
|---|---|
| Vent type | Power Vent, Power Direct Vent |
| Vent size | 3 / 2 |
| Smart / connected capable | No |
|---|
| Width | 17 in |
|---|---|
| Depth | 16 in |
| ENERGY STAR certified | Yes |
|---|
Real flow rate by climate
A tankless heater's usable flow depends on how far it must raise incoming water temperature. Sustained hot-water flow of the American ATHR-160M 1 (MTHR-160M 1) at common temperature rises (a typical shower uses about 2 GPM of mixed water):
| Temperature rise | Climate | Sustained flow | Simultaneous showers |
|---|---|---|---|
| 45 °F | Warm climate (~75 °F groundwater) | 4.8 GPM | 2 |
| 55 °F | Mild climate (~65 °F groundwater) | 4.8 GPM | 2 |
| 70 °F | Cold climate (~50 °F groundwater) | 4.3 GPM | 2 |
| 77 °F | DOE test condition | 3.9 GPM | 1 |
Compare the American ATHR-160M 1 (MTHR-160M 1)
- American ATHR-160M 1 (MTHR-160M 1) vs A. O. Smith ACTH-199M-(N,P) 1
- American ATHR-160M 1 (MTHR-160M 1) vs A. O. Smith ATHR-160M 1
- American ATHR-160M 1 (MTHR-160M 1) vs A. O. Smith ATHR-160M 1 (ATHR-160X3 1)
- American ATHR-160M 1 (MTHR-160M 1) vs Bosch Greentherm (T9800 SE 160)
- American ATHR-160M 1 (MTHR-160M 1) vs Bosch Greentherm (T9800 SEO 160)
- American ATHR-160M 1 (MTHR-160M 1) vs Bosch Greentherm (T9900 SE 160)
- American ATHR-160M 1 (MTHR-160M 1) vs Bradford White RTGR150N1
- American ATHR-160M 1 (MTHR-160M 1) vs Bradford White RTGR150X1
Similar water heaters
- A. O. Smith ATHR-160M 1 (UEF 0.95)
- A. O. Smith ATHR-160M 1 (ATHR-160X3 1) (UEF 0.95)
- A. O. Smith ATHR-160M 1 (GT15THR-160M 1) (UEF 0.95)
- A. O. Smith ATHR-160M 1 (GT15THR-160X3 1) (UEF 0.95)
- A. O. Smith ATM-160M-N 1 (UEF 0.95)
- A. O. Smith ATM-160M-N 1 (ATM-160X3-N 1) (UEF 0.95)
Frequently asked questions
Is the American ATHR-160M 1 (MTHR-160M 1) ENERGY STAR certified?
Yes, the American ATHR-160M 1 (MTHR-160M 1) holds a current ENERGY STAR certification for water heating efficiency (UEF 0.95).
How much does the American ATHR-160M 1 (MTHR-160M 1) cost to run per year?
About $258 per year at national average energy rates, based on its certified annual energy use under the DOE test draw pattern. Your rate and usage change this figure.
What venting does the American ATHR-160M 1 (MTHR-160M 1) use?
The American ATHR-160M 1 (MTHR-160M 1) uses Power Vent, Power Direct Vent venting with 3 / 2 in vent connections. Matching the existing vent type is usually the cheapest replacement path.
Is the American ATHR-160M 1 (MTHR-160M 1) a smart water heater?
No, the American ATHR-160M 1 (MTHR-160M 1) is not connected-capable — it has no app connectivity or demand-response support.
Sources
- data.energystar.gov (retrieved 2026-07-17)