Heat pump · 240 V integrated
A. O. Smith HPS10-xxH45DV 2
The A. O. Smith HPS10-xxH45DV 2 line holds three certified rating sets of 240 V integrated heat-pump water heaters, 21 model numbers sold under five brand names, listed by A.O. Smith. Rated volume runs from 46 to 82 gal, and the first-hour rating runs from 65 to 95 gal. UEFs compare only within a draw pattern; the two high-draw sets rate UEF from 3.70 to 3.88. A. O. Smith HPS10-50H45DV 2 lists 831 kWh/yr, the third lowest of the 38 medium-draw heat-pump sets. A. O. Smith HPS10-80H45DV 2 sits exactly on the median UEF of the 58 high-draw heat-pump sets, 3.88.
Certified as of October 27, 2026 · EPA ENERGY STAR data, public domain · Compare in the Heater finder
Size by size
| Rating set | Rated volume, gal | First hour, gal | Per rated gal | UEF | UEF rank | kWh/yr |
|---|---|---|---|---|---|---|
| A. O. Smith HPS10-50H45DV 27 model numbers | 46 | 65 | 1.41 | 3.80 medium | ninth highest of 38 | 831 |
| A. O. Smith HPS10-66H45DV 27 model numbers | 67 | 82 | 1.22 | 3.70 high | 20th lowest of 58, two tied | 1,233 |
| A. O. Smith HPS10-80H45DV 27 model numbers | 82 | 95 | 1.16 | 3.88 high | 29th highest of 58, two tied | 1,279 |
UEF ranks compare sets of the same draw pattern only.
A. O. Smith HPS10-xxH45DV 2: first-hour rating against rated volume
First-hour rating, gal
Across the sizes
From A. O. Smith HPS10-50H45DV 2 to A. O. Smith HPS10-80H45DV 2, rated volume grows by 36 gal and the first-hour rating by 30 gal: 0.83 gal of first-hour output for each added rated gallon.
The sizes test at different draw patterns (two high and one medium), so UEF and annual energy compare only between sizes that share a pattern (why).
Strongest placings, size by size
| Measure | Value | Median of the group | Placing | Compared with |
|---|---|---|---|---|
| Rated electricity useA. O. Smith HPS10-50H45DV 2 | 831 kWh/yr | 894 kWh/yr | third lowest of 38 | 38 medium-draw heat-pump sets |
| UEFA. O. Smith HPS10-50H45DV 2 | 3.80 | 3.56 | ninth highest of 38 | 38 medium-draw heat-pump sets |
| Compressor cut-offA. O. Smith HPS10-66H45DV 2 | 37 °F | 36.3 °F | 19th highest of 90, 27 tied | 90 heat-pump sets that report one |
| Rated electricity useA. O. Smith HPS10-66H45DV 2 | 1,233 kWh/yr | 1,268 kWh/yr | 19th lowest of 58, two tied | 58 high-draw heat-pump sets |
| Rated volumeA. O. Smith HPS10-80H45DV 2 | 82 gal | 61 gal | seventh highest of 101, four tied | 101 heat-pump sets |
| First-hour ratingA. O. Smith HPS10-80H45DV 2 | 95 gal | 77 gal | tenth highest of 101, three tied | 101 heat-pump sets |
Model numbers
The line covers 21 model numbers under five brand names, all certified 2025-12-12. An asterisk stands for a variant character in the model number.
| Model number | Brand | Rating set | Height × diameter | Electrical | Refrigerant | Connected | Certified |
|---|---|---|---|---|---|---|---|
| HPS10-50H45DV 2** | A. O. Smith | HPS10-50H45DV 2 | 63 × 15 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPSN10-50H45DV 2** | A. O. Smith | HPS10-50H45DV 2 | 63 × 15 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPTS-50 2** | A. O. Smith | HPS10-50H45DV 2 | 63 × 15 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPS10250H045DV 2** | American | HPS10-50H45DV 2 | 63 × 15 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPSA050KD 2** | Lochinvar | HPS10-50H45DV 2 | 63 × 15 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| 10-50-DHPTS 2** | Reliance | HPS10-50H45DV 2 | 63 × 15 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPSX-50-DHPT 2** | State | HPS10-50H45DV 2 | 63 × 15 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPS10-66H45DV 2** | A. O. Smith | HPS10-66H45DV 2 | 61 × 23 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPSN10-66H45DV 2** | A. O. Smith | HPS10-66H45DV 2 | 61 × 23 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPTS-66 2** | A. O. Smith | HPS10-66H45DV 2 | 61 × 23 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPS10266H045DV 2** | American | HPS10-66H45DV 2 | 61 × 23 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPSA065KD 2** | Lochinvar | HPS10-66H45DV 2 | 61 × 23 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| 10-66-DHPTS 2** | Reliance | HPS10-66H45DV 2 | 61 × 23 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPSX-66-DHPT 2** | State | HPS10-66H45DV 2 | 61 × 23 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPS10-80H45DV 2** | A. O. Smith | HPS10-80H45DV 2 | 69 × 27 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPSN10-80H45DV 2** | A. O. Smith | HPS10-80H45DV 2 | 69 × 27 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPTS-80 2** | A. O. Smith | HPS10-80H45DV 2 | 69 × 27 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPS10280H045DV 2** | American | HPS10-80H45DV 2 | 69 × 27 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPSA080KD 2** | Lochinvar | HPS10-80H45DV 2 | 69 × 27 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| 10-80-DHPTS 2** | Reliance | HPS10-80H45DV 2 | 69 × 27 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
| HPSX-80-DHPT 2** | State | HPS10-80H45DV 2 | 69 × 27 in | 240 V / 22 A | R-134a | yes | 2025-12-12 |
Nearest certified alternatives
| Rating set | First hour | UEF | Rated volume |
|---|---|---|---|
| Navien NWP500S050AUMBcompared with A. O. Smith HPS10-50H45DV 2 | same gal | +0.05 | −2 gal |
| Arctic Arctic-HP-Hot Water-KA06-50compared with A. O. Smith HPS10-50H45DV 2 | same gal | +0.08 | −1.5 gal |
| American Standard ASHPWH-50compared with A. O. Smith HPS10-50H45DV 2 | +3 gal | −0.05 | −1 gal |
| Bradford White RE2HP50-1NCTTcompared with A. O. Smith HPS10-50H45DV 2 | same gal | +0.09 | −1 gal |
| A. O. Smith HPACO-45 1+AXST-66 1compared with A. O. Smith HPS10-66H45DV 2 | same gal | ±0.00 | −7 gal |