State Premier Hybrid Electric 66-Gallon Heat Pump Water Heater
State Premier Hybrid Electric 66-Gallon Heat Pump Water Heater Review
The State Premier Hybrid Electric 66-Gallon is AO Smith's larger-capacity heat-pump water heater, sized for 4+ person households. AO Smith's hybrid heat-pump engineering with State branding through plumbing supply houses. Functionally equivalent to the AO Smith Voltex Premium HPTU-66.
Specs: 66 gallons stored, integrated heat pump with 4500W backup resistance element, UEF 3.45, ENERGY STAR Most Efficient certified, 10-year tank warranty, 10-year heat pump compressor warranty. Hybrid/heat-pump-only/electric mode controls. Includes integrated condensate pump option for installations without floor drain access.
The 66-gallon capacity addresses the heat-pump limitation for larger households. Heat-pump recovery is slower than gas (about 10-15 gph at a 90°F rise depending on ambient air temperature), so the larger reservoir provides headroom that smaller heat-pump tanks lack. Operating cost about $14/month for typical 4-person households — roughly 70% lower than electric resistance, 50% lower than gas.
Right buyer: 4+ person household with basement or large utility room install location (750+ cubic feet of air space). Federal Section 25C credit (30% up to $2,000) plus utility rebates often cover the install premium versus standard electric. About $1,999 unit, $2,950 installed before rebates.
- Heat pump technology — 2–3× more efficient than resistance electric; UEF 3.45 qualifies for federal tax credits
- UEF 3.45 — top-tier efficiency; qualifies for Inflation Reduction Act §25C residential credit
- 10-year warranty — solid above-average coverage for this class
- Heat pump mode requires 1,000 sq ft ambient space and 40–90°F surrounding air — loses efficiency in cold utility rooms