Noritz EZ71DV (GQ-C2661WX-FF-1 US) vs Ruud RUTGH-CS11I
The Noritz EZ71DV (GQ-C2661WX-FF-1 US) is the more efficient unit: UEF 0.98 versus 0.96 — about 2% 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 $255/year for the Ruud RUTGH-CS11I — a $4 annual difference. The Ruud RUTGH-CS11I sustains the higher flow (5.8 GPM vs 4.7 GPM under the DOE test).
| Noritz EZ71DV (GQ-C2661WX-FF-1 US) | Ruud RUTGH-CS11I | |
|---|---|---|
| Uniform Energy Factor (UEF) | 0.98 | 0.96 |
| Fuel | Natural Gas, Propane | Natural Gas, Propane |
| Max flow rate | 4.7 GPM | 5.8 GPM |
| Draw pattern | High | High |
| Annual gas use (natural gas) | 173 therms/yr | 176 therms/yr |
| Gas input rate | 160 kBTU/h | 199 kBTU/h |
| Max current draw | 0.5 A | 2 A |
| Vent type | Power Direct Vent | Direct Vent |
| Recovery efficiency | 99 % | 98 % |
| Smart / connected capable | No | No |
| Minimum activation flow | 0.4 GPM | 0.4 GPM |
| Annual propane use | 189.07 gal/yr | 192.35 gal/yr |
| Vent size | 2 / 3 | 2 |
| Height | 26.1 in | — |
| Diameter | 18.1 in | — |
| Width | 18.1 in | 18.1 in |
| Depth | 11.8 in | 13.6 in |
| ENERGY STAR certified | Yes | Yes |
Frequently asked questions
Which costs less to run, the Noritz EZ71DV (GQ-C2661WX-FF-1 US) or the Ruud RUTGH-CS11I?
The Noritz EZ71DV (GQ-C2661WX-FF-1 US): about $251/year versus $255/year for the Ruud RUTGH-CS11I at national average rates — a $4 annual difference.
Are the Noritz EZ71DV (GQ-C2661WX-FF-1 US) and Ruud RUTGH-CS11I both ENERGY STAR certified?
Yes — every water heater in this database is drawn from the U.S. EPA ENERGY STAR certified water heater datasets.