Rinnai REHP80 80-Gallon is a heat pump (hybrid electric) water heater from Rinnai with a 75 gallon rated tank and a 91 gallon first-hour rating at a 4 UEF — 1225 kWh/yr certified use, 74.2 in tall.
Our take
Rinnai's house-badged 75-gallon unit certifies a 4.00 UEF (74th percentile) at about $208 a year High-draw — $9 under the class median — with a 91-gallon first-hour rating 3 above it and 454% recovery efficiency in the class's upper tier. The build is the tall format: 74.2 inches with a 25.7-inch diameter, among the bigger physical presences here. 240 V at 24 A, R-134a, 37.4 °F cutoff. No connectivity, and the three Rinnai listings have no rebrand twins, so pricing is whatever Rinnai's channel says it is.
Best for: Above-median delivery and efficiency in a conventional tall format.
Trade-off: Height, no smart features, and single-badge pricing.
Efficiency
Uniform Energy Factor (UEF)
4
Annual electricity use
1225 kWh/yr
Recovery efficiency
454 %
General
Fuel
Electric
Capacity
First-hour rating
91 gal
Rated storage volume
75 gal
Draw pattern
High
Heat pump
Heat pump type
240 Volt Integrated HPWH
Refrigerant (GWP)
R-134a (GWP:1430)
Compressor low-temp cutoff
37.4 °F
Installation
Input voltage
240
Max current draw
24 A
Smart features
Smart / connected capable
No
Dimensions
Height
74.2 in
Diameter
25.7 in
Certification
ENERGY STAR certified
Yes
Who is the Rinnai REHP80 80-Gallon for?
Its 91 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 24 A max draw plan for a 30 A breaker (NEC 125% continuous-load rule).
The heat pump compressor operates down to 37.4 °F ambient — below that, backup
elements take over.
The Rinnai REHP80 80-Gallon is certified hardware that Rinnai and its partner brands
publish under 3 names. The same specifications apply to every
variant:
Is the Rinnai REHP80 80-Gallon ENERGY STAR certified?
Yes, the Rinnai REHP80 80-Gallon holds a current ENERGY STAR certification for water heating efficiency (UEF 4).
How much does the Rinnai REHP80 80-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 Rinnai REHP80 80-Gallon need?
The Rinnai REHP80 80-Gallon runs on a 240 V circuit drawing up to 24 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 Rinnai REHP80 80-Gallon a smart water heater?
No, the Rinnai REHP80 80-Gallon is not connected-capable — it has no app connectivity or demand-response support.
