🌡️ Heat Pump vs Gas Water Heater Calculator
Compare annual energy use between a heat pump water heater (HPWH) and a gas water heater based on your household usage
| Water Heater Type | UEF Rating | Approx. Annual kWh | Approx. Annual Therms | Efficiency Class |
|---|---|---|---|---|
| Heat Pump (HPWH) – Standard | 3.50 | 1,700–1,900 | N/A | Excellent |
| Heat Pump (HPWH) – Good | 3.75 | 1,500–1,700 | N/A | Excellent |
| Heat Pump (HPWH) – High Eff. | 4.00 | 1,400–1,600 | N/A | Outstanding |
| Gas – Older/Basic Tank | 0.59 | N/A | 260–290 | Low |
| Gas – Standard Tank | 0.65 | N/A | 225–260 | Average |
| Gas – Newer Standard | 0.70 | N/A | 200–240 | Good |
| Gas – High Efficiency | 0.82 | N/A | 170–210 | Very Good |
| Gas – Condensing | 0.92 | N/A | 150–185 | Excellent |
| Electric Resistance (standard) | 0.92–0.95 | 4,200–5,000 | N/A | Average |
| Activity | Gallons (Imperial) | Liters (Metric) | Typical Duration |
|---|---|---|---|
| Shower (standard) | 15–25 gal | 57–95 L | 7–10 min |
| Shower (low-flow head) | 8–15 gal | 30–57 L | 7–10 min |
| Bath (full tub) | 30–40 gal | 114–151 L | — |
| Dishwasher (cycle) | 3–6 gal | 11–23 L | — |
| Clothes washer (warm) | 15–25 gal | 57–95 L | — |
| Hand washing (per use) | 1–2 gal | 4–8 L | — |
| Kitchen sink (per use) | 2–4 gal | 8–15 L | — |
| Household Size | Daily Hot Water (gal) | Recommended Tank | First Hour Rating Needed |
|---|---|---|---|
| 1 person | 20–30 gal | 30–40 gal | 40–50 gal/hr |
| 2 people | 30–45 gal | 40–50 gal | 50–60 gal/hr |
| 3 people | 45–65 gal | 50–55 gal | 60–70 gal/hr |
| 4 people | 60–80 gal | 55–65 gal | 70–80 gal/hr |
| 5+ people | 75–100 gal | 65–80 gal | 80–100 gal/hr |
Heat pump water heaters are also commonly called hybrid electric water heaters. They work ultra-effectively. This type of devices two or three times more energy-efficient than usual electric water heaters.
They do not generate heat self rather to traditional models. In the place self, an air-source heat pump water heater take heat from the surrounding air and switch it to higher temperature to heat water in the reservoir. The heat pumps work vice versa than refrigerators.
What Is a Heat Pump Water Heater?
That means until four times more efficient than standard water heater. Using them you escape issue locally and reduce gases from factories. At least a heat pump give free cooling in the summer, dehumidification all year and slightly cooler air in the winter what no always desired.
You can buy independent heat pump water heating system as one unit. These devices come with built-in reservoir and helpful resistance heating elements. Almost all heat pump water heaters are hybrid.
They have rule in that they operate as usual electric water heaters. That less efficient but more practical in cold weather because it does not take heat from the room. Electrical elements use together with the pump.
In hybrid mode it spares until certain amount of warm water used. Many models are available also with WiFi connection leak detection and glass-lined reservoir.
The upfront cost of a heat pump water heater depends on several causes. Also the bought unit the brand the install time and the available support. Size and brand affects the price.
For instance they cost 1,200 USD for 50-gallon reservoir until 2,500 USD for 80-gallon of good producers. Although they now form only 2; 3 % of the American market about water heaters new federal rules about efficiency will have that alter. Some models as the A. O. Smith Signature Series stress high efficiency to heat water and help to save money.
