Water Heaters
LochinvarCHPA-66 2**
ENERGY STAR certified · Aug 2026
- Annual energy use
- 1292 kWh/yr
- Tank size
- 68 gal
- Uniform energy factor
- 3.84
Running cost calculator
Where your state sits among all 51
Cost to run a water heater in every state
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How this is calculated
- Annual energy use is the figure ENERGY STAR lists for this model under typical test conditions. It is not measured in your home.
- Yearly cost = annual kWh × your rate. Monthly cost is the yearly cost divided by 12, a flat average. Five-year cost keeps the rate constant; prices will change.
- Statewide averages are not your utility’s tariff. Use your bill’s rate for a closer number.
- We do not estimate watts or hourly cost: the source data does not include them.
How it compares
Among 305 ENERGY STAR certified 240 volt integrated HPWH models with a similar tank size (51 to 85 gal), this one ranks 235th lowest in annual energy use.
- Median of these models
- 1233 kWh/yr
- This model vs the median
- +5%
- Uses less than
- 20% of them
Compared with every comparable model on the ENERGY STAR list, not only the ones published on this site. Same type, similar size.
Same type and size, lower energy use
| Model | kWh/yr | Difference |
|---|---|---|
| Rheem CPRO H65 T2 RH310BM | 900 | 900 kWh |
| Ruud PRO H65 T2 RU310UM | 900 | 900 kWh |
| Ruud PRO H65 T2 RU310BM | 900 | 900 kWh |
| Friedrich PROH65 T2 FD310BM | 900 | 900 kWh |
| Richmond 10CE80-HP5S30 | 1213 | 1213 kWh |
Yearly cost by state
Same 1292 kWh/yr at each state’s average residential price (2026-07).
Comparable models
Same type, within 25% of this model’s tank size.
Specifications
- Annual energy use
- 1292 kWh/yrENERGY STAR estimated annual electricity use for the rated usage pattern
- Tank size
- 68 galStorage volume
- Uniform energy factor
- 3.84 Uniform Energy Factor
- Type
- 240 Volt Integrated HPWH
- Rated usage
- High-Usage
- First-hour rating
- 83 gal
- Electric input
- 4.5 kW
- Maximum amps
- 22.0
- Input voltage
- 240
- Tank height
- 61 in
- Tank diameter
- 23 in
- Refrigerant
- R-134a
- Refrigerant and GWP
- R-134a (GWP:1430)
- Connected
- Yes
- Markets
- United States
- Available on market
- 2024-03-01
- ENERGY STAR ID
- 4689622
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Frequently asked questions
How much electricity does the Lochinvar CHPA-66 2** use?
ENERGY STAR lists 1292 kWh per year under typical test conditions, as ENERGY STAR publishes it for the usage pattern of the rating. Your use will differ with household size, how much hot water you draw and the temperature of the room the heater sits in.
How much does it cost to run?
At statewide average residential prices, the listed annual use costs about $164.34 in Louisiana and $620.16 in Hawaii (EIA, 2026-07). Your own utility rate may be different; enter it in the calculator.
How does the Lochinvar CHPA-66 2** compare with similar models?
Among 305 ENERGY STAR certified 240 volt integrated HPWH models with a similar tank size, it ranks 235th lowest in annual energy use. Its 1292 kWh per year is 5% above the median of 1233 kWh.
What does the uniform energy factor mean?
It is the hot water delivered for each unit of energy the water heater uses, so a higher number means lower running cost. This model is listed at 3.84. A heat pump water heater scores far above a conventional electric one because it moves heat instead of making it.
Learn more
Methodology and sources
Model data comes from the ENERGY STAR Certified Water Heaters dataset (EPA). Electricity prices are statewide average residential prices from the U.S. EIA, latest period July 2026. Values are stored locally and refreshed by scheduled imports. Missing values are left blank, never estimated.