A. O. Smith Heat Pump 65-Gallon (HPTV-66 2) is a heat pump (hybrid electric) water heater from A. O. Smith with a 68 gallon rated tank and a 76 gallon first-hour rating at a 3.2 UEF — 1550 kWh/yr certified use, 61 in tall.
Our take
A 120-volt dedicated-circuit unit in the 65-gallon class is unusual — most no-rewire options are smaller — and this one keeps a 76-gallon first-hour rating, just under the class median, for 5+ people. The efficiency cost is visible: 3.20 UEF (14th percentile) and about $264 a year, the class's highest certified cost, though still far below any resistance tank. R-513A refrigerant carries less than half the GWP of the class-standard R-134a. Connected-capable; 15 A on a 20 A / 120 V circuit; 61 inches tall. Five brand names certify it.
Best for: Family-scale capacity where only 120 V service is available.
Trade-off: Class-worst running cost is the price of skipping the 240 V run.
Efficiency
Uniform Energy Factor (UEF)
3.2
Annual electricity use
1550 kWh/yr
Recovery efficiency
368 %
General
Fuel
Electric
Capacity
First-hour rating
76 gal
Rated storage volume
68 gal
Draw pattern
High
Heat pump
Heat pump type
120 Volt Integrated HPWH
Refrigerant (GWP)
R-513A (GWP:630)
Compressor low-temp cutoff
37 °F
Installation
Input voltage
120
Max current draw
15 A
Smart features
Smart / connected capable
Yes
Dimensions
Height
61 in
Diameter
23 in
Certification
ENERGY STAR certified
Yes
Who is the A. O. Smith Heat Pump 65-Gallon (HPTV-66 2) for?
Its 76 gallon first-hour rating suits a
household of 5+ people under DOE sizing guidance.
Estimated running cost: about $264/year at the national
average electricity rate (1550 kWh/yr certified use).
Runs on a 120 V circuit (up to 15 A) — often no new wiring needed.
The heat pump compressor operates down to 37 °F ambient — below that, backup
elements take over.
Also sold as
The A. O. Smith Heat Pump 65-Gallon (HPTV-66 2) is certified hardware that A. O. Smith and its partner brands
publish under 6 names. The same specifications apply to every
variant:
Is the A. O. Smith Heat Pump 65-Gallon (HPTV-66 2) ENERGY STAR certified?
Yes, the A. O. Smith Heat Pump 65-Gallon (HPTV-66 2) holds a current ENERGY STAR certification for water heating efficiency (UEF 3.2).
How much does the A. O. Smith Heat Pump 65-Gallon (HPTV-66 2) cost to run per year?
About $264 per year at national average energy rates, based on its certified annual energy use under the DOE test draw pattern. Your rate and usage change this figure.
What electrical circuit does the A. O. Smith Heat Pump 65-Gallon (HPTV-66 2) need?
The A. O. Smith Heat Pump 65-Gallon (HPTV-66 2) runs on a 120 V circuit drawing up to 15 A — many installations use an existing outlet with no new wiring.
Is the A. O. Smith Heat Pump 65-Gallon (HPTV-66 2) a smart water heater?
Yes, the A. O. Smith Heat Pump 65-Gallon (HPTV-66 2) is connected-capable, with app control and eligibility for most utility demand-response programs.
