Heat pump · 240 V integrated
A. O. Smith HPxxH45DV 1
The A. O. Smith HPxxH45DV 1 line holds two certified rating sets of 240 V integrated heat-pump water heaters, 29 model numbers sold under six brand names, listed by A.O. Smith. Rated volume runs from 46 to 82 gal, and the first-hour rating runs from 66 to 86 gal. UEFs compare only within a draw pattern; the one high-draw sets rate UEF 3.45. A. O. Smith HP1080H45DV 1, the set with the most model numbers, rates 0.43 below 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 HP1050H45DV 114 model numbers | 46 | 66 | 1.43 | 3.45 medium | 11th lowest of 38 | 902 |
| A. O. Smith HP1080H45DV 115 model numbers | 82 | 86 | 1.05 | 3.45 high | seventh lowest of 58, three tied | 1,387 |
UEF ranks compare sets of the same draw pattern only.
A. O. Smith HPxxH45DV 1: first-hour rating against rated volume
First-hour rating, gal
Across the sizes
From A. O. Smith HP1050H45DV 1 to A. O. Smith HP1080H45DV 1, rated volume grows by 36 gal and the first-hour rating by 20 gal: 0.56 gal of first-hour output for each added rated gallon.
The sizes test at different draw patterns (one 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 |
|---|---|---|---|---|
| Compressor cut-offA. O. Smith HP1050H45DV 1 | 45 °F | 36.3 °F | highest of 90, six tied | 90 heat-pump sets that report one |
| UEFA. O. Smith HP1050H45DV 1 | 3.45 | 3.56 | 11th lowest of 38 | 38 medium-draw heat-pump sets |
| Compressor cut-offA. O. Smith HP1080H45DV 1 | 45 °F | 36.3 °F | highest of 90, six tied | 90 heat-pump sets that report one |
| UEFA. O. Smith HP1080H45DV 1 | 3.45 | 3.88 | seventh lowest of 58, three tied | 58 high-draw heat-pump sets |
Model numbers
The line covers 29 model numbers under six brand names, all certified 2023-02-23. An asterisk stands for a variant character in the model number.
| Model number | Brand | Rating set | Height × diameter | Electrical | Refrigerant | Connected | Certified |
|---|---|---|---|---|---|---|---|
| HP1050H45DV 1** | A. O. Smith | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HP1050H45DVCTA-1** | A. O. Smith | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPTU-50CTA 1** | A. O. Smith | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPTU-50DR 1** | A. O. Smith | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPTU-50N 1** | A. O. Smith | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPHE10250H045DVCTA-1** | American | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPHE10250H045DVDR 1** | American | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPHE10250H045DVN 1** | American | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPA052KD 1** | Lochinvar | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| 10-50-DHPHTCTA 1** | Reliance | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| 10-50-DHPHTNE 1** | Reliance | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPX-50-DHPTCTA 1** | State | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPX-50-DHPTNE 1** | State | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPHE2K50HD045VUN 1** | U.S. Craftmaster | HP1050H45DV 1 | 63 × 15 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HP1080H45DV 1** | A. O. Smith | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HP1080H45DVCTA-1** | A. O. Smith | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPTU-80CTA 1** | A. O. Smith | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPTU-80DR 1** | A. O. Smith | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPTU-80N 1** | A. O. Smith | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPHE10280H045DVCTA-1** | American | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPHE10280H045DVDR 1** | American | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPHE10280H045DVN 1** | American | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPA082KD 1** | Lochinvar | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| 10-80-DHPHTCTA 1** | Reliance | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| 10-80-DHPHTNE 1** | Reliance | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPX-80-DHPTCTA 1** | State | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPX-80-DHPTDR 1** | State | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPX-80-DHPTNE 1** | State | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
| HPHE2K80HD045VUN 1** | U.S. Craftmaster | HP1080H45DV 1 | 69 × 27 in | 240 V / 22 A | R-134a | no | 2023-02-23 |
Nearest certified alternatives
| Rating set | First hour | UEF | Rated volume |
|---|---|---|---|
| Vaughn Thermal ME80HPTcompared with A. O. Smith HP1080H45DV 1 | same gal | +0.03 | −8 gal |
| A. O. Smith FPTU-80 1compared with A. O. Smith HP1080H45DV 1 | −2 gal | ±0.00 | same gal |
| Rheem PROPH80 T0 RH120-Mcompared with A. O. Smith HP1080H45DV 1 | −2 gal | +0.01 | −10 gal |
| Vaughn Thermal MP80FHPTcompared with A. O. Smith HP1080H45DV 1 | same gal | +0.05 | −2 gal |
| Bradford White RE2H50S-compared with A. O. Smith HP1050H45DV 1 | −1 gal | −0.01 | −1 gal |