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How Do Boilers In Your Home Actually Work?

Your boiler might not have given you much thought unless there’s a breakdown. With knowledge of how these work, you can identify specific issues sooner and manage your heating more efficiently.

How Does A Gas Boiler Work?

The boiler is a crucial part of your central heating. Boilers send hot water through taps and Radiators that provide you with heating and hot water.

Gas boilers can either be connected to the gas supply or LPG cylinders. If connected to the mains, they will operate continuously. Alternatively, LPG is stored in cylindrical containers that need refilling from time to time. Your boiler is what provides central heating for your home. When the valves open, it permits gas passage into a closed subspace. Pilot light or electric ignition is then used to start a fire that burns according to the consumption of gas and water, and this produces heat which then warms up your home accordingly.

The hot water passes through the boiler to which airs are blown. This heats up the water, and after passing through a heat exchanger, it is made even hotter by using electricity to pump it into radiators or taps.

All new boilers are now made to be condensing. They’re arranged with a heat exchanger that removes as much heat from the flue gases as possible. Condensing boilers use the latent heat from water vapour that’s produced in the process of heating. These systems help reuse the heat that your central heating system creates in order to reduce wastage. Modern boilers are now more likely to be condensers as they recover excess heat energy. The Law states all new boilers must be condensing.

What Are The Different Boiler Types And How Do They Work?

There are four types of boilers and each has its own way of burning fuel and sending water through. The basic process is the same with each type, but how it does so differs from boiler to boiler.

Combi Boilers

Combustion boilers combine heating and hot water storage in your home in one. They have two connected heat exchangers – one that feeds into radiators and another that meets the demand for hot water.

Combination boilers do not need any water tanks or cylinders. They stay on standby and are ready to provide hot water as soon as you ask for it. The boiler needs a fuel source, like natural gas or propane, which is then used to heat the water when you turn on the tap.

Combination boilers are designed with valves so that when you need one, the other is off. That means they can only provide either hot water or heating at a time.

Conventional Boilers Or A Heat Only Boiler

Heat-only boilers are your standard form of heating in the home. They work alongside a water tank that holds cold water and a hot water cylinder.

These systems also have a feed and expansion tank to control water levels and account for expansion when it is heated. This tank feeds cold water to the heating system while replacing any lost water due to evaporation or leaks.

The cold water tank is filled with water from the main supply. Once the boiler starts, it will send either hot or cold to either the hot-water cylinder or radiators as long as it’s been heated up.

These boilers can be equipped with a backup immersion heater for hot water, allowing you to access an independent heat source if your boiler breaks down.

System Boilers

A system boiler has additional hot water cylinders and isn’t connected to any storage tanks for storing fire. It will use the water and heat from your main heating system to generate boiling hot water, which can be used for the tank and radiators.

A system boiler is a sealed pressurised system. Coldwater is sourced directly from the mains supply, and after heating, it goes to either the hot-water cylinder to be stored or radiators to heat your home. When you need hot water, all you have to do is turn on your tap and enjoy.”

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