Noritz EZ71DV (GQ-C2661WX-FF-1 US) vs State ATHR-160M 1 (STHR-160M 1)
The Noritz EZ71DV (GQ-C2661WX-FF-1 US) is the more efficient unit: UEF 0.98 versus 0.95 — about 3% less energy for the same hot water. At national average rates that works out to about $251/year for the Noritz EZ71DV (GQ-C2661WX-FF-1 US) against $258/year for the State ATHR-160M 1 (STHR-160M 1) — a $7 annual difference. The State ATHR-160M 1 (STHR-160M 1) sustains the higher flow (4.8 GPM vs 4.7 GPM under the DOE test).
| Noritz EZ71DV (GQ-C2661WX-FF-1 US) | State ATHR-160M 1 (STHR-160M 1) | |
|---|---|---|
| Uniform Energy Factor (UEF) | 0.98 | 0.95 |
| Fuel | Natural Gas, Propane | Natural Gas, Propane |
| Max flow rate | 4.7 GPM | 4.8 GPM |
| Draw pattern | High | High |
| Annual gas use (natural gas) | 173 therms/yr | 178 therms/yr |
| Gas input rate | 160 kBTU/h | 160 kBTU/h |
| Max current draw | 0.5 A | 5 A |
| Vent type | Power Direct Vent | Power Vent, Power Direct Vent |
| Recovery efficiency | 99 % | 98 % |
| Smart / connected capable | No | No |
| Minimum activation flow | 0.4 GPM | 1 GPM |
| Annual propane use | 189.07 gal/yr | 194.53 gal/yr |
| Vent size | 2 / 3 | 3 / 2 |
| Height | 26.1 in | — |
| Diameter | 18.1 in | — |
| Width | 18.1 in | 17 in |
| Depth | 11.8 in | 16 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the Noritz EZ71DV (GQ-C2661WX-FF-1 US) or the State ATHR-160M 1 (STHR-160M 1)?
The Noritz EZ71DV (GQ-C2661WX-FF-1 US): about $251/year versus $258/year for the State ATHR-160M 1 (STHR-160M 1) at national average rates — a $7 annual difference.
Are the Noritz EZ71DV (GQ-C2661WX-FF-1 US) and State ATHR-160M 1 (STHR-160M 1) both ENERGY STAR certified?
Yes — every water heater in this database is drawn from the U.S. EPA ENERGY STAR certified water heater datasets.