A combination boiler instantaneously heats water on demand straight to your taps, saving you time, money and gas energy. All components for heating and hot water are contained within the one appliance. A standard 25 kilowatt output combination boiler is suitable for up to 12 radiators in a property with one bathroom. For larger properties, there are larger output combination boilers that are designed to handle up to two bathrooms and a W/C. Combination boilers are a great boiler choice if you need to free up space in an airing cupboard by removing the cylinder. One of the benefits is that the property will have all its water outlets direct from the cold mains, and therefor no risks involved in storing water in the loft to fill a cylinder.
For a large family that uses a lot of hot water then you could install a regular boiler in conjunction with a hot water cylinder. Regular boilers can be installed anywhere throughout the property, but they have a separate cylinder and controls which are usually housed in an airing cupboard, however lots of people are putting the boiler and the cylinder in the loft these days to create extra space. One benefit to having this type of system is that if the boiler were to break down, the hot water cylinder can be heated by an immersion heater if this is a) fitted and b) connected to the electricity supply.
A system boiler is like a regular boiler but it is designed to be installed on a pressurised system without a feed and expansion tank in the loft. The system boiler also incorporates its own pump, an expansion vessel, and a pressure relief valve. These boilers are larger in dimension to regular boilers, and to provide hot water a cylinder will also be required on the system that can be heated by the system boiler.
Unvented cylinders are supplied directly from the cold water mains, therefor stamping out issues with water pressures that can affect tank fed cylinders. Another advantage of the unvented cylinder is that they have very fast re-heat times, 30 minutes or so, and they are very well insulated. A full tank of hot water heated to 65 degrees C, will remain hot enough for a shower or bath for at least 12 hours.
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1 in 9 boilers inspected by the Gas Safe register are found to be unsafe!!
61% of British households did not have their boiler serviced in the last 12 months