Solar Underfloor Heating

Solar underfloor heating
Not only can a solar thermal system provide you with hot water for your home, it can also power underfloor heating.

Underfloor heating has grown in popularity in recent years in the UK and many homeowners have chosen it in place of more traditional central heating systems due to its high efficiency and low running costs. Providing a mixture of radiant and convection heat, underfloor heating can be powered using electricity or heated water depending on the type of system. For an underfloor system that uses heated water, also known as a wet system, solar thermal panels can contribute part of the necessary heated water.


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How solar underfloor heating works

A solar thermal store cylinder can be used to combine floor heating and mains pressure hot water.  The cylinders are designed to work with solar panels and a boiler but can also be adapted to take additional heat sources such as stoves, back boilers and heat pumps.

The water in the thermal store cylinder is heated by the boiler to around 60°C – 70°C. There are two coils within the thermal store that are linked together. The mains water enters the bottom coil and circulates through all the coils until reaching its desired temperature at the top.

There are two tappings in the thermal store to provide heat for underfloor heating. The solar coil can be found at the lowest part of the thermal store, which is the coolest. This area of the cylinder is not heated by the boiler and is further cooled by the cold water coming from the mains and the domestic hot water coil. This allow for a higher level of contribution from solar energy towards heating.

Advantages of powering underfloor heating with solar

The biggest benefit of using solar thermal in conjunction with an underfloor heating system is the reduced energy bills. Once a solar thermal system is installed it has an extremely low running cost over its lifetime, so you can enjoy paying less for energy. This also means reducing your home’s carbon dioxide production and being able to rely less on utility providers.

Interested in getting a solar thermal system for your home? You can get free quotes to compare using our simple online form.


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