Typical underfloor heating arrangement (Reproduced with permission from Nu-Heat, UK)

heating in general usually needs a less sophisticated electronic controller than a radiator-based system, simply because it involves much greater thermal masses and, therefore, much slower changes in temperature.

DHW supplies can become more reliable if a so-called triple function system is specified. This uses a dedicated second internal refrigerant to water heat exchanger to supply heat to the DHW tank/thermal store. To make economic sense when running entirely on electricity from national grids, heat pump installations are normally sized to produce less than 100% of the building's DHW and space heating and cooling needs, although the ideal percentage is unique to each location and each project and is very dependent on current and projected energy prices. When renewable energy is involved the equation can look very different.

Heat pump performance continues to improve, with vapour compression pump COPs now topping four for the inherently more efficient ground source variant. The latest versions are quiet, reliable and compact, and prices are increasingly competitive as more manufacturers enter the market. Serious consideration should be given to heat pumps for almost every building project - especially in combination with other technologies (see Chapter 16).

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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