Rheem PROP G40-50-RH HE EC3 40-Gallon
Rheem PROP G40-50-RH HE EC3 40-Gallon is a gas storage water heater from Rheem with a 40 gallon rated tank and a 88 gallon first-hour rating at a 0.9 UEF.
| Uniform Energy Factor (UEF) | 0.9 |
|---|---|
| Annual gas use (natural gas) | 188 therms/yr |
| Recovery efficiency | 97 % |
| Annual propane use | 205.46 gal/yr |
| Fuel | Natural Gas, Propane |
|---|
| First-hour rating | 88 gal |
|---|---|
| Rated storage volume | 40 gal |
| Draw pattern | High |
| Gas input rate | 50 kBTU/h |
|---|
| Max current draw | 7 A |
|---|---|
| Vent type | Power Direct Vent |
| Vent size | 2 / 3 |
| Smart / connected capable | No |
|---|
| Height | 54.5 in |
|---|---|
| Diameter | 21.8 in |
| ENERGY STAR certified | Yes |
|---|
Capacity and running cost
- Its 88 gallon first-hour rating suits a household of 5+ people under DOE sizing guidance.
- Rated for a high-usage draw pattern under the DOE test procedure.
- Estimated running cost: about $273/year at national average gas rates.
Similar water heaters
- A. O. Smith GC6-PS4050-V 1 40-Gallon (UEF 0.9)
- A. O. Smith GC6-PS5065-V 1 50-Gallon (UEF 0.9)
- A. O. Smith GPCC-40L 1 40-Gallon (UEF 0.9)
- A. O. Smith GPCT-40L 1 40-Gallon (UEF 0.9)
- A. O. Smith GPCT-40L 1 40-Gallon (GC9-PS4050NV 1) (UEF 0.9)
- A. O. Smith GPCT-40L 1 40-Gallon (HPCT-40L 1) (UEF 0.9)
Frequently asked questions
Is the Rheem PROP G40-50-RH HE EC3 40-Gallon ENERGY STAR certified?
Yes, the Rheem PROP G40-50-RH HE EC3 40-Gallon holds a current ENERGY STAR certification for water heating efficiency (UEF 0.9).
How much does the Rheem PROP G40-50-RH HE EC3 40-Gallon cost to run per year?
About $273 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 Rheem PROP G40-50-RH HE EC3 40-Gallon use?
The Rheem PROP G40-50-RH HE EC3 40-Gallon uses Power Direct Vent venting with 2 / 3 in vent connections. Matching the existing vent type is usually the cheapest replacement path.
Is the Rheem PROP G40-50-RH HE EC3 40-Gallon a smart water heater?
No, the Rheem PROP G40-50-RH HE EC3 40-Gallon is not connected-capable — it has no app connectivity or demand-response support.
Sources
- data.energystar.gov (retrieved 2026-07-17)