Most efficient 40-gallon electric water heaters
Electric tanks filed at 35 to 45 gallons, ranked by filed UEF inside each draw pattern.
297 40-gallon electric water heaters are on file. Ranked by filed UEF inside each draw pattern, the most efficient at the low draw pattern is the GE Profile PF40S10FPY01 (UEF 3.1).
Editor's note
Both heat pump and resistance tanks are in this list, because the registry files them as one type; the heat pumps rank first on UEF because they move heat rather than make it.
Low draw pattern
a one- or two-person household — 58 models, top 25 shown, highest UEF first.
- Rank 1: GE Profile PF40S10FPY01 UEF 3.1
- Tied at rank 2: FRIEDRICH PROPH40 T0 RH120-M UEF 2.8
- Tied at rank 2: Rheem PROPH40 T0 RH120-M UEF 2.8
- Tied at rank 2: Richmond PROPH40 T0 RH120-M UEF 2.8
- Tied at rank 2: Ruud PROPH40 T0 RH120-M UEF 2.8
- Rank 6: AMERICAN STANDARD WATER HEATERS ENS50L-* UEF 0.95
- Tied at rank 7: FRIEDRICH PROE38 S2 RH93 SB-LO UEF 0.93
- Tied at rank 7: Rheem PROE38 S2 RH93 SB-LO UEF 0.93
- Tied at rank 7: Ruud PROE38 S2 RH93 SB-LO UEF 0.93
- Tied at rank 10: AMERICAN STANDARD WATER HEATERS ENS40L-* UEF 0.92
- Tied at rank 10: AMERICAN STANDARD WATER HEATERS ENS40LUB* UEF 0.92
- Tied at rank 10: AMERICAN STANDARD WATER HEATERS ENS40LUB 240V-3500W UEF 0.92
- Tied at rank 10: ARISTON ENS40L-* UEF 0.92
- Tied at rank 10: ARISTON ENS40LUB* UEF 0.92
- Tied at rank 10: ARISTON ENS40LUB 240V-3500W UEF 0.92
- Tied at rank 10: HUBBELL ME-40 UEF 0.92
- Tied at rank 10: Lennox WHES040L45SN240B**** UEF 0.92
- Tied at rank 10: Lennox WHES040L45TN240B**** UEF 0.92
- Tied at rank 10: VAUGHN ME-40 UEF 0.92
- Tied at rank 10: VAUGHN THERMAL ME-40 UEF 0.92
- Tied at rank 21: A. O. SMITH ENJ-40W 1** UEF 0.91
- Tied at rank 21: A. O. SMITH ENJB-40W 1** UEF 0.91
- Tied at rank 21: A. O. SMITH ENLB-50W 1** UEF 0.91
- Tied at rank 21: A. O. SMITH MHE6-40RW-035D-1** UEF 0.91
- Tied at rank 21: AMERICAN ENJ-40W 1** UEF 0.91
19 more models in this draw pattern also file UEF 0.91; the list stops at 25, not at a difference.
Medium draw pattern
a typical three- or four-person household, about 55 gallons on a busy morning — 239 models, top 25 shown, highest UEF first.
- Rank 1: GE Profile PH40S10BPY01 UEF 4.2
- Tied at rank 2: BRADFORD WHITE RE2HP50**-1NCTT UEF 3.89
- Tied at rank 2: JETGLAS RE2HP50**-1NCTT UEF 3.89
- Tied at rank 4: FRIEDRICH PROPH50 T2 RH375-SO UEF 3.88
- Tied at rank 4: FRIEDRICH PROPH50 T2 RH400-30 UEF 3.88
- Tied at rank 4: Rheem PROPH50 T2 RH375-SO UEF 3.88
- Tied at rank 4: Rheem PROPH50 T2 RH400-30 UEF 3.88
- Tied at rank 4: Richmond PROPH50 T2 RH375-SO UEF 3.88
- Tied at rank 4: Richmond PROPH50 T2 RH400-30 UEF 3.88
- Tied at rank 4: Ruud PROPH50 T2 RH375-SO UEF 3.88
- Tied at rank 4: Ruud PROPH50 T2 RH400-30 UEF 3.88
- Rank 12: NAVIEN NWP500S050AUMB UEF 3.85
- Tied at rank 13: ARISTON ARIHPWH-50-T UEF 3.83
- Tied at rank 13: Lennox WHHP050T45MD240S**** UEF 3.83
- Tied at rank 15: AMERICAN STANDARD WATER HEATERS ARIHPWH-50 UEF 3.75
- Tied at rank 15: ARISTON ARIHPWH-50 UEF 3.75
- Tied at rank 17: A. O. SMITH HPTA-40 2** UEF 3.6
- Tied at rank 17: AMERICAN HPTA-40 2** UEF 3.6
- Tied at rank 17: LOCHINVAR HPTA-40 2** UEF 3.6
- Tied at rank 17: RELIANCE WATER HEATERS HPTA-40 2** UEF 3.6
- Tied at rank 17: STATE HPTA-40 2** UEF 3.6
- Tied at rank 22: AMERICAN STANDARD WATER HEATERS ARIHPWH-40 UEF 3.58
- Tied at rank 22: ARISTON ARIHPWH-40 UEF 3.58
- Tied at rank 24: ARISTON ARIHPWH-40-T UEF 3.55
- Tied at rank 24: Lennox WHHP040T45MD240S**** UEF 3.55
How this list is ranked
One filed figure decides the order, inside one draw pattern at a time — the only scope where it compares. Models that file the same figure share a rank, shown as =N. A draw pattern is ranked only when it holds at least eight models and their figures spread by at least 8%; models named in a CPSC recall are left out.
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