What size boiler do I need for my home?

Choosing the right boiler is sometimes a tricky task. There are so many types of boilers out there to choose from it can be hard to know which is the right one for your home and it’s needs. If you choose the right boiler it can provide your home with heating and hot water for a very long time.  

The perfect boiler for your home will vary depending on the hot water and heating needs of your home. There are several factors you need to consider when choosing your new or replacement boiler. We have put together a list of a few things you should think about then making your decision. 

Number of radiators  

When choosing your boiler, the size of the boiler is usually listed by the output size shown in kilowatts (kW) rather than the physical size of the boiler. Kilowatts is the unit used to measure how much energy is output by the boiler in the form of heat. 

Radiator quantity is important because as a rule the more heat and hot water you require the higher output you need from your boiler. 

The size of your home, heating and hot water demand  

You need to consider the size of your home when purchasing a boiler, the larger your property the more powerful boiler you’ll need. You will need the boiler to be able to heat the space efficiently and ensure that the water pressure is sufficient and maintained throughout the property to avoid wasted energy. 

The number of people within your household and how frequently they run baths and showers should also play a factor in deciding the boiler you choose. If you have multiple bathrooms, you have more showers, baths and taps to provide hot water too. The overall demand is higher for hot water and heating in a larger home which therefore requires a boiler with a larger kW.  

Heat loss 

A heating engineer will also be able to help you choose your new boiler or boiler replacement by calculating your home’s heat loss. 

This can be done by assessing your floor area, the number of radiators, types of windows, if your home is insulated, and other aspects that cause heat loss in your home. The calculation can then be used to break down how much heat your house will lose and help you choose the most efficient boiler size for your home. 

Fuel type 

Another factor to consider is the fuel type available in your property. 

Gas boilers are a popular choice for UK homes as they offer a great level of efficiency. However, if your home is not connected to a mains gas supply there is the option of oil, LPG or electric. 

You might also like to consider if the boiler you are choosing is compatible with other energy sources. Renewable energy sources are becoming more and more popular, and some modern boilers will be compatible with energy sources like solar panels.  

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