September 14, 2021

What’s The Best Boiler Size For Your Home?

Choosing the best heater for your house may be difficult. It may be difficult to determine which boiler is appropriate for your house with so many choices and kinds available. When installed correctly, the boiler you choose may last up to fifteen years and will be responsible for all of your heating and hot water requirements throughout the year. The ideal boiler size for your home may vary depending on your heating and hot water requirements, therefore it’s critical that the right boiler be installed that meets your needs and doesn’t waste money on your energy costs.

When answering the question “what size boiler do I need?” there are many variables to consider, but we’ve put up a handy article to assist you.


Why is it important to choose the appropriate boiler size for your home?

When we talk about a boiler’s size, we’re not talking about its physical measurements. Instead, we’re talking about the output in kilowatts (kW), which is the unit for measuring how much energy the boiler produces in the form of heat. It is important to choose the appropriate boiler size for your house so that you do not waste energy or money.

In general, the greater the output, the more heat and hot water you’ll need, but other variables come into play when deciding on the appropriate size.


Amount of radiators

The number of radiators in your house is an important consideration when selecting the appropriate size boiler for your home. If you live in a tiny house, such as a flat or apartment, the lowest appropriate boiler size will be enough to heat your home and supply enough hot water. It should also assist you in avoiding overpaying for electricity.

A small or medium boiler (for example, 24-30 kW) should suffice for an ordinary three or four-bedroom home with about 10 radiators. A larger home with a lot of radiators or an en-suite bathroom would require a bigger one, usually about 30-35 kW.

If you have a big home with up to twenty radiators, a large 35-42 kW combi boiler may be required to give enough heat while saving money, or it may be preferable to switch to a system boiler that may be scaled more properly.


Size, layout, and demand are all factors to consider

If you have a bigger property, you’ll need a more powerful boiler to heat the whole structure more effectively and maintain the correct water pressure throughout without wasting energy.

The number of bathrooms in your home, as well as how often you use baths and showers, will influence the amount of boiler you need. If you have a big family, the demand for hot water and heating will be greater, necessitating a boiler with a higher kW rating.


Loss of heat

Previously, the size of your home was often considered while determining the appropriate boiler size. However, today, a heating expert can estimate the most effective and efficient boiler size by calculating your home’s heat loss.

When calculating heat loss, a variety of variables are considered, including floor space, the number of radiators, the number and type of windows, insulation, and other factors that cause heat to be lost from your house. The formula will then be used to estimate how much heat your home will lose on the coldest day of the year, allowing you to buy the boiler that is the most appropriate size for your needs.


Type of Fuel

The kind of fuel available in your home may also influence the size of the boiler you choose, since the efficiency of boilers for various fuels varies.

The majority of UK households use gas boilers, which are the most efficient, although residences without access to mains gas typically opt for an oil-fired or LPG (liquefied petroleum gas) system instead.

Furthermore, some contemporary boilers are designed to accommodate future energy sources, such as solar panels, which should be considered when selecting the appropriate boiler size for your house.


What is the best kind of boiler for YOUR home?

You must first decide which boiler type is ideal for your house before deciding on the size of your boiler. Depending on how much room you have available and what boiler system you already have, there are many different kinds of boilers, each with its own set of advantages and efficiency.

We’ve described the three major kinds of boilers here, but our guide has a more comprehensive description of the many types of boilers available for your house.


Combination Boilers

Combi boilers, are one of the most popular kinds of boiler in UK homes. They heat hot water just when it’s required, so no hot water is stored. They’re a single system that combines a water heater with a central heating boiler, and they operate by being on standby and heating water nearly quickly when you need it. Combi boilers, on the other hand, can only support one outlet at a time, thus they can only be used for heating or hot water, not both. This boiler may not be the ideal choice if you have a big home with numerous water outputs.


Conventional Boilers

Conventional boilers, also known as ‘Standard,’ ‘Traditional,’ or ‘Regular’ boilers, heat your water using hot and cold water storage tanks. A traditional boiler heats the water using a fuel source such as gas or oil, which is then pumped to the hot water tank. This hot water flows to your taps and out your taps or shower when your heating or water is switched on. Conventional boilers are ideal for a straight replacement for your current heating system and are often found in older, more traditional homes.


System Boilers

A system boiler takes water straight from the mains and heats it in a storage cylinder for use in your house, making it ideal for bigger properties or homes with a greater need for hot water. System boilers remove the need for a cold water tank by utilising the mains water supply, which means you’ll have immediate access to hot water at two or more outlets at the same time without the water pressure decreasing.


What happens when a boiler is too big?

If a boiler is large, it will ‘cycle’ on and off too often, heating up too fast to only operate for a brief time before shutting down due to overheating. Each start-up is near to full power, dumping a massive quantity of heat into the system and overheating the radiators. This will reduce energy efficiency and put additional stress on the components, resulting in increased wear and tear and a shorter boiler lifetime. A boiler is most efficient when it can operate at a reduced output for extended periods of time, therefore this is advised to avoid spending more money in the long run.


What happens if my boiler isn’t large enough?

If your boiler is inadequate, it may not be able to adequately heat your home, particularly in the winter, or provide enough hot water when several people in the house are attempting to shower or use the faucets. Use our boiler purchasing guide to make sure you purchase the appropriate boiler for your house.


Speak with Elite Group today to discuss the best boiler size for your home. Brand new boiler installs are now available with interest free finance & no upfront costs, get a quote here.