Richmond RMTGHSR11IN
Richmond RMTGHSR11IN is a gas tankless water heater from Richmond rated 5.8 GPM at a 0.96 UEF.
| Uniform Energy Factor (UEF) | 0.96 |
|---|---|
| Annual gas use (natural gas) | 176 therms/yr |
| Recovery efficiency | 98 % |
| Annual propane use | 192.35 gal/yr |
| Fuel | Natural Gas |
|---|
| Max flow rate | 5.8 GPM |
|---|---|
| Draw pattern | High |
| Minimum activation flow | 0.4 GPM |
| Gas input rate | 199 kBTU/h |
|---|
| Max current draw | 2 A |
|---|---|
| Vent type | Direct Vent |
| Vent size | 2 |
| Smart / connected capable | No |
|---|
| Width | 18.1 in |
|---|---|
| Depth | 13.6 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 Richmond RMTGHSR11IN 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) | 5.8 GPM | 2 |
| 55 °F | Mild climate (~65 °F groundwater) | 5.8 GPM | 2 |
| 70 °F | Cold climate (~50 °F groundwater) | 5.5 GPM | 2 |
| 77 °F | DOE test condition | 5 GPM | 2 |
Similar water heaters
- A. O. Smith ACTH-199M-(N,P) 1 (UEF 0.95)
- A. O. Smith T-H3-OS-N 1 (ACT-199O-N 1) (UEF 0.95)
- A. O. Smith T-H3-OS-N 1 (ACT-199O-P 1-1) (UEF 0.95)
- A. O. Smith T-H3-OS-N 1 (ATO-540H 1) (UEF 0.95)
- A. O. Smith T-H3-OS-N 1 (ATO-540H 1-1) (UEF 0.95)
- A. O. Smith T-H3-OS-N 1 (ATO-540HX3-N 1) (UEF 0.95)
Frequently asked questions
Is the Richmond RMTGHSR11IN ENERGY STAR certified?
Yes, the Richmond RMTGHSR11IN holds a current ENERGY STAR certification for water heating efficiency (UEF 0.96).
How much does the Richmond RMTGHSR11IN cost to run per year?
About $255 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 Richmond RMTGHSR11IN use?
The Richmond RMTGHSR11IN uses Direct Vent venting with 2 in vent connections. Matching the existing vent type is usually the cheapest replacement path.
Is the Richmond RMTGHSR11IN a smart water heater?
No, the Richmond RMTGHSR11IN is not connected-capable — it has no app connectivity or demand-response support.
Sources
- data.energystar.gov (retrieved 2026-07-17)