Rheem ProTerra 15 A 50 Gal
#16 in 40–50 GallonFull review
The ProTerra for a home that only has a 15 A, 240 V circuit, such as one left by a small electric tank: it avoids rewiring but gives up some efficiency and first-hour delivery.
The Rheem ProTerra 15 A 50 Gal is the better heat pump water heater overall, rated 3.1 to 2.4. The Rheem ProTerra 15 A 50 Gal leads on efficiency and hot water.
Rheem ProTerra Plug-in 40 Gal
#23 in 40–50 GallonFull review
A plug-in for replacing a gas tank in a mild-climate garage or basement without new wiring. Buy a size up, since it has no element to fall back on.
Home Depot $1,699$1,699
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Rheem ProTerra 15 A 50 Gal for efficiency (3.75 UEF vs 2.80 UEF) and hot water (52 gallons in the first hour vs 45 gallons in the first hour).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 40–50 gallon heat pump water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Rheem ProTerra 15 A 50 Gal | Rheem ProTerra Plug-in 40 Gal |
|---|---|---|
| Overall rating | 3.1/5 | 2.4/5 |
| Efficiency 35% | 54 3.75 UEF | 0 2.80 UEF |
| Hot water 20% | 8 52 gallons in the first hour | 0 45 gallons in the first hour |
| Warranty 20% | 75 10-year tank, 10-year parts, 1-year labor | 75 10-year tank, 10-year parts, 1-year labor |
| Cold rooms 15% | 32 heat pump runs down to 37 °F room air | 32 heat pump runs down to 37 °F room air |
| Noise 10% | 69 45 dB(A) | 50 noise not published (neutral score used) |
Specifications
| Rheem ProTerra 15 A 50 Gal | Rheem ProTerra Plug-in 40 Gal | |
|---|---|---|
| Ratings (ENERGY STAR) | ||
| Size (nominal) | 50 gal | 40 gal |
| Tank volume (measured) | 45 gal | 36 gal |
| Uniform Energy Factor | 3.75 | 2.80 |
| First-hour rating | 52 gal | 45 gal |
| Draw pattern | Medium | Low |
| Yearly energy use | 846 kWh | 780 kWh |
| Heat pump cut-off (low) | 37 °F | - |
| Sound level | 45 dB(A) | - |
| ENERGY STAR ID | 3554192 | 3555260 |
| Installation | ||
| Power | 240 V | Plug-in 120 V |
| Circuit | 15 A, 208/240 V | Shared 15 A or 20 A circuit |
| Backup element | 2,250 W | None |
| Operating air range | 37 to 145 °F | 37 to 145 °F |
| Minimum room size | 700 cu ft | 700 cu ft |
| Size | 61.8 in tall, 22.3 in across | 62.3 in tall, 20.3 in across |
| Weight | 185 lb | 157 lb |
| Refrigerant | R-134a | R-134a |
| Features | ||
| Wi-Fi | Built in | Built in |
| App | EcoNet | EcoNet |
| Demand response port (CTA-2045) | Yes | Yes |
| Leak detection | No | No |
| Modes | Energy Saver, Heat Pump, High Demand, Electric, Vacation | Heat Pump, Vacation |
| Warranty and models | ||
| Warranty | 10 yr tank, 10 yr parts, 1 yr labor | 10 yr tank, 10 yr parts, 1 yr labor |
| Also sold as | Friedrich PROH50 T2 FD400-15, Rheem PROPH50 T2 RH375-15, Rheem PROPH50 T2 RH400-15, Richmond 10E50-HP515, Richmond 10E50-HP5U15, Ruud PROUH50 T2 RU375-15, Ruud PROUH50 T2 RU400-15 | Friedrich PROH40 T0 FD120-M, Friedrich PROH40 T0 FD120-MSO, Rheem PROPH40 T0 RH120-M, Rheem PROPH40 T0 RH120-MSO, Richmond 10E40-HP120M, Richmond 10E40-HP120MS, Ruud PROUH40 T0 RU120-M, Ruud PROUH40 T0 RU120-MSO |
| Released | 2024-06 | 2022-04 |