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Building Products December 2017

HEATING, VENTILATION AND AIR CONDITIONING HOME IS WHERE THE BOILER IS When it comes to making a home truly comfortable, heating and hot water play a major role. However, finding the most appropriate boiler for a property’s individual needs can prove to be challenge. Here, Darran Smith, technical manager at Alpha Heating Innovation, talks through the options. Installing the correct product into a home is imperative as all properties have individual and specific requirements. Crucially, the product model must satisfy the demand of the home by supplying the correct amount of heating and hot water. There are three main types of boiler design that are seen within residential properties, as well as a variety of different control methods. The combination boiler, or combi boiler, is the most popular choice today, with 70% of replacement boilers being this type. Intertwining a water heater and central heating boiler in one unit, a combi provides high energy efficiency. These products are able to deliver instant hot water on demand, without the requirement of storing hot water in a separate cylinder. As a result, the space that would be used in the loft and 32 BUILDING PRODUCTS | DECEMBER 2017 cupboard for storage tanks are freed up, making it ideal as a space saving system. This is an important advantage when you consider that the average new-build home is now nearly 10m² smaller than those built in 2003. Also with homeowners increasingly choosing to convert their loft into living areas, the space saving achieved with a combination boiler makes it an obvious choice in these situations. Heating water on demand also has energy efficiency benefits. Conventional boilers will heat water at certain intervals throughout the day and any hot water that isn’t used will begin to cool down – effectively wasting the energy used to heat it. In contrast, combination boilers eliminate this by only heating the water when required. Combination boilers are ideal for new-builds or small homes due to their compact size and overall efficiency. However, for properties that require larger volumes of hot water, a combi may not be the most appropriate option. In this case, a system boiler, which has a sealed system and pump to successfully provide central heating and hot water, may be more suitable. Usually located in an airing cupboard, they use a storage cylinder. The hot water in the storage cylinder is kept permanently topped up and, The product must satisfy the demand of the home


Building Products December 2017
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