Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-MSO)
Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-MSO) is a heat pump (hybrid electric) water heater from Friedrich with a 36 gallon rated tank and a 45 gallon first-hour rating at a 2.8 UEF — 780 kWh/yr certified use, 45.5 in tall.
Also sold as the Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-M). This model is the same certified
hardware as the Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-M), 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)
2.8
Annual electricity use
780 kWh/yr
Recovery efficiency
387 %
General
Fuel
Electric
Capacity
First-hour rating
45 gal
Rated storage volume
36 gal
Draw pattern
Low
Heat pump
Heat pump type
120 Volt Integrated HPWH
Refrigerant (GWP)
R-134a (GWP:1430)
Compressor low-temp cutoff
210 °F
Installation
Input voltage
120
Max current draw
4.5 A
Smart features
Smart / connected capable
No
Dimensions
Height
45.5 in
Diameter
16 in
Certification
ENERGY STAR certified
Yes
Who is the Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-MSO) for?
Its 45 gallon first-hour rating suits a
household of 1–2 people under DOE sizing guidance.
Estimated running cost: about $133/year at the national
average electricity rate (780 kWh/yr certified use).
Runs on a 120 V circuit (up to 4.5 A) — often no new wiring needed.
The heat pump compressor operates down to 210 °F ambient — below that, backup
elements take over.
Is the Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-MSO) ENERGY STAR certified?
Yes, the Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-MSO) holds a current ENERGY STAR certification for water heating efficiency (UEF 2.8).
How much does the Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-MSO) cost to run per year?
About $133 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 Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-MSO) need?
The Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-MSO) runs on a 120 V circuit drawing up to 4.5 A — many installations use an existing outlet with no new wiring.
Is the Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-MSO) a smart water heater?
No, the Friedrich Heat Pump 40-Gallon (PROH40 T0 FD120-MSO) is not connected-capable — it has no app connectivity or demand-response support.
