Lennox Heat Pump Water Heater 65-Gallon is a heat pump (hybrid electric) water heater from Lennox with a 61 gallon rated tank and a 77 gallon first-hour rating at a 4.05 UEF — 1225 kWh/yr certified use, 50.5 in tall.
Also sold as the Ariston Heat Pump Water Heater 65-Gallon (ARIHPWH-65-T). This model is the same certified
hardware as the Ariston Heat Pump Water Heater 65-Gallon (ARIHPWH-65-T), published under a
different brand — full details, comparisons, and pricing live on that page. The
certified figures below are identical.
Efficiency
Uniform Energy Factor (UEF)
4.05
Annual electricity use
1225 kWh/yr
Recovery efficiency
446 %
General
Fuel
Electric
Capacity
First-hour rating
77 gal
Rated storage volume
61 gal
Draw pattern
High
Heat pump
Heat pump type
240 Volt Integrated HPWH
Refrigerant (GWP)
R-513A (GWP:630)
Compressor low-temp cutoff
35 °F
Installation
Input voltage
240
Max current draw
21 A
Smart features
Smart / connected capable
Yes
Dimensions
Height
50.5 in
Diameter
20.2 in
Certification
ENERGY STAR certified
Yes
Who is the Lennox Heat Pump Water Heater 65-Gallon for?
Its 77 gallon first-hour rating suits a
household of 5+ people under DOE sizing guidance.
Estimated running cost: about $208/year at the national
average electricity rate (1225 kWh/yr certified use).
Needs a 240 V circuit; at 21 A max draw plan for a 30 A breaker (NEC 125% continuous-load rule).
The heat pump compressor operates down to 35 °F ambient — below that, backup
elements take over.
Is the Lennox Heat Pump Water Heater 65-Gallon ENERGY STAR certified?
Yes, the Lennox Heat Pump Water Heater 65-Gallon holds a current ENERGY STAR certification for water heating efficiency (UEF 4.05).
How much does the Lennox Heat Pump Water Heater 65-Gallon cost to run per year?
About $208 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 Lennox Heat Pump Water Heater 65-Gallon need?
The Lennox Heat Pump Water Heater 65-Gallon runs on a 240 V circuit drawing up to 21 A; per the NEC 125% continuous-load rule plan for at least a 30 A breaker (check the installation manual for the required circuit).
Is the Lennox Heat Pump Water Heater 65-Gallon a smart water heater?
Yes, the Lennox Heat Pump Water Heater 65-Gallon is connected-capable, with app control and eligibility for most utility demand-response programs.
