hot water system heat pump work in a similar way to a refrigerator. The fan draws a steady supply of cooled air into the system. It then passes that cooled air through an evaporator.

The evaporator is filled with refrigerant which absorbs the absorbed heat from the air. The evaporator also draws cooled air back into the unit from outside. The pumped refrigerant elevates its temperature, which allows it to deliver its heat to the water in the storage tank.

Some models have an electric boost element that comes on when the air temperature is lower to speed up the reheating process. This can save energy and make the appliance more efficient to run.

In addition, some of these units can be set to run on a timer so they can be switched off when they aren't in use. This is particularly useful for those who use solar power to generate electricity to run the heat pump.

The amount of hot water a heat pump can provide depends on the size of the tank and the number of people in the home. If you have a large family and a lot of demand for hot water, consider a system with a larger storage capacity and high heating efficiency.

Compared to electric storage systems, heat pump water heaters use significantly less electricity. They are much cheaper to run, and can be a good fit for households that have a lot of Hot water system usage.

Heat pump systems can be a great option for homes in warmer climates where the water temperature tends to be relatively higher than the ambient air. They are also a good choice for homes with wood or oil-fired boilers because they can help take the heat out of those fuels, which means you won't need to heat your house with a conventional furnace.

However, if you live in a colder climate, you'll need to ensure that your heat pump is certified for that environment. In many cases, you'll need to choose a model that meets the Northern Climate Efficiency Specification from the Northwest Energy Efficiency Alliance.

One of the most common reasons for buying a heat pump water heater is to cut energy costs. If you can find a heat pump that is ENERGY STAR certified, then you should be able to save on your utility bill and get an immediate tax credit.

You'll also want to find a model that can be monitored and controlled remotely to help you reduce your water heating energy use. Moreover, some of these models can be used with demand response systems to help reduce your water heating energy use even further.