Rinnai REHP80CW
ENERGY STAR certified
Heat pump water heater · 75 gallons
Inthis water heater costs
about $18 a month
$222 a year
An estimate at your state's average rate — not a guarantee of your bill.
The yellow sticker says $172 a year.
You'll pay $50 more.
Sticker uses 14¢ per kWh. The U.S. average is 18.0¢ per kWh.
Energy use
1,230 kWh a year
vs similar heat pump water heater
+10%
Cheaper water heaters, same size
ENERGY STAR lists 5 other certified models at the same 1,230 kWh a year, size and type, so everything on this page applies to them too.
- Midea CAN3-RSJ-15/300RDVN3-L4
- Midea MAHW-80VN3B
- Midea MCHW-80VN3B
- Midea US3-RSJ-15/300RDVN3-L4
- Rinnai REHP80W
Cheaper to run, same size
- GE Profile PH80S10BNY01Heat pump water heater · 80 gallons$199
- GE Profile PH80S10BPY01Heat pump water heater · 80 gallons$203
- Smart Solar SSG2-ES 80Heat pump water heater · 80 gallons$215
- Arctic Arctic-HP-Hot Water-KA06-80Heat pump water heater · 71 gallons$216
A year at the U.S. average residential rate.
Cost in every state
1,230 kWh a year × each state's average residential rate (EIA 12-month average through July 2026).
| State | Rate | Per year | Per month |
|---|---|---|---|
| Hawaii | 43.7¢ | $538 | about $45 a month |
| California | 33.1¢ | $407 | about $34 a month |
| Massachusetts | 30.4¢ | $374 | about $31 a month |
| Rhode Island | 29.4¢ | $361 | about $30 a month |
| Maine | 29.3¢ | $360 | about $30 a month |
| New York | 28.4¢ | $349 | about $29 a month |
| Connecticut | 28.2¢ | $347 | about $29 a month |
| Alaska | 27.0¢ | $332 | about $28 a month |
| New Hampshire | 26.8¢ | $329 | about $27 a month |
| District of Columbia | 24.2¢ | $298 | about $25 a month |
Show all 52 statesShow fewer
| Vermont | 23.9¢ | $294 | about $24 a month |
|---|---|---|---|
| New Jersey | 23.6¢ | $290 | about $24 a month |
| Maryland | 22.3¢ | $274 | about $23 a month |
| Michigan | 21.0¢ | $258 | about $22 a month |
| Pennsylvania | 20.8¢ | $255 | about $21 a month |
| Illinois | 19.0¢ | $233 | about $19 a month |
| Wisconsin | 18.8¢ | $231 | about $19 a month |
| Ohio | 18.3¢ | $225 | about $19 a month |
| U.S. average | 18.0¢ | $222 | about $18 a month |
| Delaware | 18.0¢ | $221 | about $18 a month |
| Indiana | 17.1¢ | $210 | about $17 a month |
| Virginia | 16.6¢ | $204 | about $17 a month |
| Colorado | 16.6¢ | $204 | about $17 a month |
| Alabama | 16.5¢ | $203 | about $17 a month |
| Minnesota | 16.2¢ | $200 | about $17 a month |
| Texas | 16.0¢ | $197 | about $16 a month |
| South Carolina | 15.7¢ | $193 | about $16 a month |
| West Virginia | 15.7¢ | $193 | about $16 a month |
| Oregon | 15.6¢ | $192 | about $16 a month |
| Arizona | 15.5¢ | $190 | about $16 a month |
| Florida | 15.4¢ | $190 | about $16 a month |
| New Mexico | 15.2¢ | $187 | about $16 a month |
| Kansas | 15.1¢ | $186 | about $15 a month |
| Georgia | 15.1¢ | $185 | about $15 a month |
| Mississippi | 14.9¢ | $184 | about $15 a month |
| North Carolina | 14.9¢ | $183 | about $15 a month |
| South Dakota | 14.3¢ | $176 | about $15 a month |
| Washington | 14.2¢ | $174 | about $15 a month |
| Wyoming | 14.2¢ | $174 | about $15 a month |
| Iowa | 14.1¢ | $173 | about $14 a month |
| Kentucky | 14.0¢ | $172 | about $14 a month |
| Montana | 13.9¢ | $171 | about $14 a month |
| Missouri | 13.9¢ | $171 | about $14 a month |
| Tennessee | 13.7¢ | $168 | about $14 a month |
| Oklahoma | 13.6¢ | $168 | about $14 a month |
| Nevada | 13.6¢ | $167 | about $14 a month |
| Arkansas | 13.5¢ | $166 | about $14 a month |
| Utah | 13.3¢ | $164 | about $14 a month |
| Louisiana | 13.1¢ | $161 | about $13 a month |
| Nebraska | 12.9¢ | $159 | about $13 a month |
| Idaho | 12.7¢ | $156 | about $13 a month |
| North Dakota | 12.5¢ | $154 | about $13 a month |
What the Rinnai REHP80CW costs where electricity is expensive
At Hawaii's average residential rate of 43.7¢ per kWh, the Rinnai REHP80CW costs $538 a year — $365 more a year than the label says. The EnergyGuide label estimates $172 a year, because every label in the country is calculated at 14¢ per kWh. At the U.S. average of 18.0¢ per kWh this water heater costs $222 a year, and in North Dakota, the cheapest state, $154 a year.
| Where | Rate | Cost a year | vs the label |
|---|---|---|---|
| Hawaii | 43.7¢ per kWh | $538 | +$365 |
| California | 33.1¢ per kWh | $407 | +$235 |
| Massachusetts | 30.4¢ per kWh | $374 | +$202 |
| Rhode Island | 29.4¢ per kWh | $361 | +$189 |
| Maine | 29.3¢ per kWh | $360 | +$188 |
| North Dakota | 12.5¢ per kWh | $154 | −$18 |
Electricity prices: EIA 12-month average through July 2026, residential sector, average revenue per kWh. Label figure calculated at 14¢ per kWh, the rate the FTC requires on labels.
Full specs
At the U.S. average residential rate this one costs $222 a year — about 10% more expensive to run than the average heat pump water heater ($203 a year across 510 certified models).
Every model on this scale is ENERGY STAR certified. Range across 510 heat pump water heaters, priced a year at the U.S. average residential rate.
- Brand
- Rinnai
- Model number
- REHP80CW
- Model name
- heat pump water heater
- Type
- Heat pump water heater
- Capacity
- 75 gallons
- Annual energy use
- 1,230 kWh a year
- Combined Energy Factor (CEF)
- 4
- ENERGY STAR Most Efficient
- No
- On the market since
- June 2026
- Certified
- July 2026
- Tank volume (gallons)
- 75
- First-hour rating (gallons)
- 91
- Uniform Energy Factor (UEF)
- 4.00
- Draw pattern
- High-Usage
- Heat pump type
- 240 Volt Integrated HPWH
- Recovery efficiency (%)
- 450.00
- Tank height (in)
- 41.7
- Tank diameter (in)
- 21.8
Where to buy
We do not sell appliances. These open a search on the retailer's own site.
Common questions
+How much does the Rinnai REHP80CW cost to run per month?
about $18 a month at the U.S. average residential rate of 18.0¢ per kWh, or $222 a year. Your cost depends on your state's rate — see the table above.
+How many kWh does the Rinnai REHP80CW use?
1,230 kWh a year, as the manufacturer filed it with the EPA, in the ENERGY STAR certified product database.
+Is the Rinnai REHP80CW energy efficient?
It is listed as ENERGY STAR certified. It uses about 10% more electricity than the average heat pump water heater (average: 1,123 kWh a year).
+How does the Rinnai REHP80CW compare to the average water heater?
The average heat pump water heater in our database uses 1,123 kWh a year, costing $203 a year at the U.S. average residential rate. The Rinnai REHP80CW uses 1,230 kWh a year, costing $222 a year.
How we calculate this
Annual energy use (1,230 kWh a year) is the figure the manufacturer filed for this model with the EPA, in the ENERGY STAR certified product database. Running cost is that figure multiplied by a state's average residential electricity price from the U.S. Energy Information Administration (12-month average through July 2026, average revenue per kWh).
The annual figure for a water heater assumes a hot water draw of 10, 38, 55 or 84 gallons a day, set by the heater's first-hour rating, per the DOE test procedure (10 CFR 430 Subpart B, Appendix E). Full methodology.
Sources: EPA ENERGY STAR certified product data, updated weekly · U.S. EIA electricity prices, 12-month average through July 2026.