Utilising the free renewable heat taken from the air, air source heat pumps can be installed internally or externally. The more efficient the heat pump, the more renewable heat will be produced. Initially the domestic RHI only covers ASHP that heat water – i.e. air to water.
The renewable heat is taken from the ground or water and is suitable for properties with access to open or large gardens, or additional land. Installations can be completed via a borehole method – where a small hole is drilled into the earth to pick up geothermal heat – or the ground loop method – where ground loop pipes are buried in channels up and down the garden / land.
You can install either a biomass-only boiler, fueled by wood pellet, wood chip or logs, or a biomass pellet stove with a back burner (this includes boiler stoves) and these will be eligible for the Domestic RHI. Ideal for properties with their own wood supply or for those with good access to replenish the wood fuel.
Using free energy from the sun to provide hot water, solar thermal flat plate panels or evacuated tubes, work all year round to reduce your energy bills and CO2 emissions. A boiler or immersion heater will be needed to top up the water temperature during winter months. You'll need around 3-5 square metres of roof space which faces east to west through south and receives direct sunlight for the main part of the day. The panels don't have to be mounted on a roof: they can be fixed to a frame on a flat roof or hung on a wall.