We installed an Alpha Innotec LWD70 air source heat pump along with a 250 litre unvented hot water cylinder and 100 litre wall hung buffer vessel. The house was constructed with underfloor heating throughout with 150mm pipe spacing in a liquid screed solid floor construction.
This enabled us to operate the heat pump at a very low water temperature and significantly increased system efficiency. This is further enhanced by weather compensation which adjusts the floor temperature according to external weather conditions. It also acts as a self-regulating control, limiting the effects of overheating in the warmer months and providing stable room temperatures.