Solar Thermal Hot Water
Solar thermal hot water heating systems use heat from the sun to work alongside your conventional water heater. The technology is well developed with a large choice of equipment to suit many applications.
Benefits
- can provide you with around a third of your hot water needs
- reduces your impact on the environment - the average domestic system reduces carbon dioxide emissions by around 330kg per year, depending on the fuel replaced.
Different types of system
What
best suits your needs depends on a
range of factors, including the area of south facing roof, the existing
water heating system (e.g. some combi boilers aren't suitable) and your
budget.
A competent
professional installer should
assess your situation and discuss with you the best configuration to
meet your needs.
Solar
water heating and your home
Solar water heating can be used in the home or for larger applications,
such as swimming pools.
For domestic hot water there are three main components: solar panels, a
heat transfer system, and a hot water cylinder. Solar panels -
or
collectors - are fitted to your roof. They collect heat from the sun's
radiation. The heat transfer system uses the collected heat to heat
water. A hot water cylinder stores the hot water that is heated during
the day and supplies it for use later.
Is
my property suitable?
Preferably you will need 3-4m2 of southeast to southwest facing roof receiving direct sunlight for the main part of the day. You'll also need space to locate an additional water cylinder if required.
Cost and maintenance
The typical installation cost for a domestic system is £3,200 - £4,500.
Solar thermal hot water systems generally come with a 10-year warranty and require very little maintenance. A yearly check by the householder and a more detailed check by a professional installer every 3-5 years should be sufficient (consult your system supplier for exact maintenance requirements).
