A. O. Smith Water heaters: energy use and running cost

The average model uses 1,080 kWh a year, which costs $227 a year at 21.0¢/kWh.

Most efficient models

ModelkWh/yearCost/year
A. O. Smith HPS10-50H45DV 2**831$175
A. O. Smith HPSN10-50H45DV 2**831$175
A. O. Smith HPTS-50 2**831$175
A. O. Smith CAHP-50 2**883$186
A. O. Smith HPA10-50H45DV 2**883$186
A. O. Smith HPTA-50 2**883$186
A. O. Smith CAHP-40 2**902$190
A. O. Smith HP1050H45DV 1**902$190
A. O. Smith HP1050H45DVCTA-1**902$190
A. O. Smith HPA10-40H45DV 2**902$190
A. O. Smith HPTA-40 2**902$190
A. O. Smith HPTU-50CTA 1**902$190
A. O. Smith HPTU-50DR 1**902$190
A. O. Smith HPTU-50N 1**902$190
A. O. Smith HPACO-45 1**+AXST-50LBTTP 1**915$192
A. O. Smith HPACO-45C 1**+AXST-50LBCTTP 1*915$192
A. O. Smith HPACO-45 1**+AXST-50S 1**923$194
A. O. Smith HPACO-45 1**+AXST-50STTP 1**923$194
A. O. Smith HPACO-45 1**+AXST-50T 1**923$194
A. O. Smith HPACO-45 1**+AXST-50TTTP 1**923$194
A. O. Smith HPACO-45C 1**+AXST-50SC 1**923$194
A. O. Smith HPACO-45C 1**+AXST-50SCTTP 1**923$194
A. O. Smith HPACO-45C 1**+AXST-50TC 1**923$194
A. O. Smith HPACO-45C 1**+AXST-50TCTTP 1**923$194
A. O. Smith FPTU-50 1**970$204
A. O. Smith HPS10-66H45DV 2**1,233$259
A. O. Smith HPSN10-66H45DV 2**1,233$259
A. O. Smith HPTS-66 2**1,233$259
A. O. Smith CAHP-80 2**1,279$269
A. O. Smith HPA10-80H45DV 2**1,279$269
A. O. Smith HPS10-80H45DV 2**1,279$269
A. O. Smith HPSN10-80H45DV 2**1,279$269
A. O. Smith HPTA-80 2**1,279$269
A. O. Smith HPTS-80 2**1,279$269
A. O. Smith CAHP-66 2**1,292$272
A. O. Smith HPA10-66H45DV 2**1,292$272
A. O. Smith HPTA-66 2**1,292$272
A. O. Smith HPACO-45 1**+AXST-80 1**1,306$274
A. O. Smith HPACO-45 1**+AXST-80TTP 1**1,306$274
A. O. Smith HPACO-45C 1**+AXST-80C 1**1,306$274
A. O. Smith HPACO-45C 1**+AXST-80CTTP 1**1,306$274
A. O. Smith HPACO-45 1**+AXST-66 1**1,341$282
A. O. Smith HPACO-45 1**+AXST-66TTP 1**1,341$282
A. O. Smith HPACO-45C 1**+AXST-66C 1**1,341$282
A. O. Smith HPACO-45C 1**+AXST-66CTTP 1**1,341$282
A. O. Smith HPTU-66CTA 1**1,381$290
A. O. Smith HPTU-66DR 1**1,381$290
A. O. Smith HPTU-66N 1**1,381$290
A. O. Smith HP1080H45DV 1**1,387$291
A. O. Smith HP1080H45DVCTA-1**1,387$291
A. O. Smith HPTU-80CTA 1**1,387$291
A. O. Smith HPTU-80DR 1**1,387$291
A. O. Smith HPTU-80N 1**1,387$291
A. O. Smith FPTU-66 1**1,391$292
A. O. Smith FPTU-80 1**1,396$293
A. O. Smith HPTV-50 2**1,550$326
A. O. Smith HPTV-66 2**1,550$326
A. O. Smith HPV10-50H01DV 2**1,550$326
A. O. Smith HPV10-66H01DV 2**1,550$326
A. O. Smith HPTV-80 2**1,654$348
A. O. Smith HPV10-80H01DV 2**1,654$348

Source: ENERGY STAR (U.S. EPA) · 21.0¢/kWh (August 2026) · Methodology