air to air - heat pumps

Air-sourced heat pumps absorb heat from air and transfer it to heat water. They run on electricity but are more efficient than conventional electric water heaters when used in the right environment. Heat pump water heaters are used to provide water heating for households and some commercial buildings.

A heat pump water heater consists of an insulated storage tank and a heating module. The heating module must be installed outdoors, but there are options to install the storage tank either outdoors with the heating module, or indoors separated from the heating module by up to 4 metres. 

A heat pump works to heat water by transferring the intensified warmth from the air around it into the water, stored in the tank, via a heat exchange system that works in a similar way to an air conditioner. <link to How a Heat Pump Works>

When emptied, it takes time to reheat to have you back in hot water. Heat pumps draw less electricity than a traditional electric storage water heater, and in doing so, are more energy efficient. They do take longer to heat water, so consider a larger tank capacity to ensure you have enough hot water when you need it.

Heat pumps are an ideal replacement option for an electric water heater as they will often use existing plumbing; or as an alternative to solar where unshaded north facing or limited roof space is a problem as they don’t require the installation of roof mounted solar collectors.

See energy efficient design