Solar Thermal Panels, called ‘Collectors’, are attached to the roof. They use energy from the sun to heat up water which is then stored in a hot water cylinder. A boiler or immersion heater can be used to top temperatures up. They are highly effective in summer – less so in winter, but still produce a good saving.

Solar Thermal combines well with an Air Source Heat Pump (Air to Air)

Cost: Between £3,000 – £5,000 (depending on the size of the system).

Returns: Typical saving of between £60 and £130 per year, depending on the primary heat source.

Qualifies for RHI (Renewable Heat Incentive) of between £190 and £460 per year for 7 years.