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Which system is best for me?

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What They Say

Plumbing and Heating Engineer North LondonThere are several factors to be considered when choosing a new boiler for your home. Space, number of bathrooms, budget and mains water flow rate must all be taken into account. Outlined below are some of the differences between the two most popular boiler types on the market, combination and system boilers.

Combination boilers

Combi boilers are highly efficient, ingenious space saving appliances, which can provide your home with both central heating and instantaneous hot water without the need for a hot water cylinder.

They are best suited for homes with limited space and a maximum of two bathrooms.

The downside of combi boilers is that they heat mains water on demand. If there is more than one hot water outlet (tap or shower) in use at once then the pressure is split between the two outlets, significantly reducing the output.

System boilers with unvented cylinders

System boilers provide hot water to both the radiators and storage cylinder simultaneously.

System boilers heat a large unvented cylinder of stored water, meaning you can use multiple hot water outlets at once without suffering a reduction in pressure. Unvented cylinders rely on mains pressured water and unlike vented cylinders, do not require a cold water storage tank in the loft. The downside of system boilers is that you will need room for both the boiler and the cylinder, which is why they are usually recommended for larger properties.

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