Hybrid heat interface units for heating and domestic hot water

We are receiving a lot of interest in our Hybrid HIU, particularly for heat pump applications from specifiers and consultants. Our range of heat interface units are evolving to meet this challenge.

In the UK, networks will typically be designed around an output temperature of 45-50 degrees C, which will maximise the COP, minimising both CO2 and
electricity bills. The Hybrid unit works at these low temperatures (or lower, down to 35 degrees C).

Domestic Hot Water presents a particular problem. Although 45 degrees is hot enough for most uses (and building regulations limit tap water temperature to 48 degrees), stored hot water must be at a temperature of at least 60 degrees to kill off legionella. This is commonly achieved by an immersion heater in a domestic hot water tank, which takes up space and pushes up heating bills.

The Hybrid HIU negates storing domestic hot water in a cylinder which is clearly desirable both in energy efficiency terms and saving space, and instantaneous water heating offers one option to top up water heating if required.

With more than 1,000 units deployed and operational in the field, we clearly see many more opportunities in these low temperature networks.