HEATING, VENTILATION & SERVICES
additional string to the bow of most professional heating installers. After attending an appropriate training course, they will be well placed to join the growing band of installers capable of fitting these heating systems in homes. A split heat pump unit has both an outside unit which incorporates the heat exchanger and refrigerant and an internal unit that sits inside the property, usually in a utility or boiler room. Most homes in the UK are suited to a monobloc air to water heat pump. A split system is an option generally for more complex installations; it can be installed up to 30 metres away from the home, which gives far more installation flexibility. The financial incentive to use heat pumps is changing in 2022. The Government has announced that the Clean Heat Grant will replace the Renewable Heat Incentive (RHI) scheme in 2022. The flat-rate grant is intended for households and small non-domestic buildings across the UK. It has been proposed to help with the upfront cost of installing heat pumps to deliver space heating and hot water, and will move the
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UK away from the RHI's tariff-based system for consumers. There are a number of options for
AWHPs. According to the MCS Installation Standard, low temperature air to water heat pumps produce an indoor heat exchanger outlet temperature of 35°C, medium temperature an outlet temperature of 55°C and high temperature air to water heat pumps an outlet temperature of 65°C. These systems don’t produce water as hot as a traditional boiler will, as they generally only reach around 50°C at a maximum. They are perfectly suited to new build homes and self-build properties – which tend to be well insulated. To be at their most effective, they operate well with either larger capacity (possibly K3 design) radiators or a higher number of radiators and/or underfloor heating. High temperature air to water heat pumps are designed for poorly insulated or particularly large properties, and those where replacing existing radiators or improving the insulation in the home isn’t possible. These high temperature heat pumps, which are offered by a
Heat pumps have seen a huge take up in northern Europe, Scandinavia and Canada – all of which experience far worse winters
few manufacturers, can heat water up to 80°C.
Donna-Marie Evans is marketing manager at LG Electronics
sep/oct 2021
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