However there are answers to all of these potential issues:
- The concrete and polystyrene walls of the Fernery are very good at retaining heat - and the underfloor heating is very efficient at distributing heat - so we are already a good match for ASHP. See the picture below which shows a cross section of the wall where the old gas flue used to be?
- Our water heating is solar assisted and we already have a very big and well insulated hot water tank with an integrated heat exchanger. On a sunny day we have just as hot water as the gas boiler would have produced and on a cloudy day we can just adjust the shower mixers to use more hot and less cold water.
- Until March 2022 people installing renewable energy heating can take advantage of the governments RHI scheme (Renewable Heating Incentive). Basically we will be paid to use renewable energy and in 6-7 years time we will have covered the complete cost of the ASHP and its installation - including the crane!