Ruud Gas Storage 50-Gallon (PROU G50-100-RU HE EC3)
Ruud Gas Storage 50-Gallon (PROU G50-100-RU HE EC3) is a gas storage water heater from Ruud with a 50 gallon rated tank and a 167 gallon first-hour rating at a 0.89 UEF.
| Uniform Energy Factor (UEF) | 0.89 |
|---|---|
| Annual gas use (natural gas) | 190 therms/yr |
| Recovery efficiency | 96 % |
| Annual propane use | 207.65 gal/yr |
| Fuel | Natural Gas, Propane |
|---|
| First-hour rating | 167 gal |
|---|---|
| Rated storage volume | 50 gal |
| Draw pattern | High |
| Gas input rate | 100 kBTU/h |
|---|
| Max current draw | 7 A |
|---|---|
| Vent type | Power Direct Vent |
| Vent size | 2 / 3 |
| Smart / connected capable | No |
|---|
| Height | 65.5 in |
|---|---|
| Diameter | 21.8 in |
| ENERGY STAR certified | Yes |
|---|
Capacity and running cost
- Its 167 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 $276/year at national average gas rates.
Similar water heaters
- Friedrich Gas Storage 50-Gallon (12PROG 50-100P FD HE EC3) (UEF 0.89)
- Friedrich Gas Storage 50-Gallon (12PROG 50-100U FD HE EC3) (UEF 0.89)
- Friedrich Gas Storage 50-Gallon (12PROG 50-76P FD HE EC3) (UEF 0.89)
- Friedrich Gas Storage 50-Gallon (12PROG 50-76U FD HE EC3) (UEF 0.89)
- HTP Phoenix 50-Gallon (UEF 0.89)
- Rheem Gas Storage 50-Gallon (ECE G50-100U CN HE EC3) (UEF 0.89)
Frequently asked questions
Is the Ruud Gas Storage 50-Gallon (PROU G50-100-RU HE EC3) ENERGY STAR certified?
Yes, the Ruud Gas Storage 50-Gallon (PROU G50-100-RU HE EC3) holds a current ENERGY STAR certification for water heating efficiency (UEF 0.89).
How much does the Ruud Gas Storage 50-Gallon (PROU G50-100-RU HE EC3) cost to run per year?
About $276 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 Ruud Gas Storage 50-Gallon (PROU G50-100-RU HE EC3) use?
The Ruud Gas Storage 50-Gallon (PROU G50-100-RU HE EC3) uses Power Direct Vent venting with 2 / 3 in vent connections. Matching the existing vent type is usually the cheapest replacement path.
Is the Ruud Gas Storage 50-Gallon (PROU G50-100-RU HE EC3) a smart water heater?
No, the Ruud Gas Storage 50-Gallon (PROU G50-100-RU HE EC3) is not connected-capable — it has no app connectivity or demand-response support.
Sources
- data.energystar.gov (retrieved 2026-07-17)