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For homeowners who are looking for ways to reduce their energy bills and minimise their carbon footprint, upgrading their home heating systems can be one option.
One system that may be worth considering is the combi boiler, which is particularly appealing for its compact design and energy efficiency. But is upgrading to a combi boiler the right choice for your household? Below, we’ll explore the key benefits and issues to help you make an informed decision.
What is a combi boiler?
A combination boiler, or combi boiler, is a unit that combines both central heating and hot water in one system. Unlike traditional boilers, these don’t require a separate hot water cylinder or a cold-water storage tank.
Combi boilers work on demand, meaning they heat water instantly as needed rather than storing it, ensuring a constant supply of hot water. The most common types of combi boilers are gas-powered, though electric models are also available for homes that are not connected to the gas grid.
Combi boilers are a popular choice in the UK, with 80% of households across the country having this type of boiler in 2023. Their space-saving nature makes them ideal for modern homes where maximising living space is a priority.
Key benefits of upgrading to a combi boiler
Energy efficiency: Combi boilers are designed to be efficient, with many models operating at efficiency rates of over 90%. This means that the vast majority of the energy used by the boiler goes directly into heating your home and hot water.
As a result, homeowners can often see a noticeable reduction in their energy bills after upgrading to a combi boiler. The Energy Saving Trust suggests that replacing an old G-rated boiler with a new A-rated combi model could save households as much as £475 annually.
Space saving: Because combi boilers do not require a separate water tank, they free up valuable space in your home. This is particularly beneficial for smaller properties, such as flats or terraced houses, where every square metre counts.
Hot water on demand: One of the major advantages of a combi boiler is the supply of instant hot water. There is no need to wait for a tank to heat up, and you won’t run out of hot water. This is ideal for homes with one or two bathrooms and moderate hot water demand.
Potential challenges and considerations
While combi boilers offer many advantages, there are several important factors to consider before making the switch.
Initial cost: The upfront cost of purchasing and installing a combi boiler can be higher than that of other systems. Installation costs typically range between £2,000 and £3,000, depending on the complexity of the job.
Water pressure: Combi boilers rely on the mains water pressure to function effectively. If your property has low water pressure, a combi boiler may not be the best option. It is essential to check your home’s water pressure before upgrading.
Suitability for larger households: While combi boilers provide a constant supply of hot water, they can struggle to meet the demand of larger households with multiple bathrooms. In such cases, a system boiler or conventional boiler might be a better option.
Another important factor to note is regulatory changes. The UK government has introduced several measures aimed at reducing carbon emissions, including the push for greener heating technologies. While combi boilers are currently a popular choice, it’s important to stay informed about any changes in the future.
Is a combi boiler the right choice?
To determine whether a combi boiler is suitable for your home, consider factors such as the size of your household, your daily hot water usage, and your current energy bills. For smaller homes or flats with fewer occupants, a combi boiler is often the most efficient and cost-effective option. However, if you have a larger property or multiple bathrooms, a system boiler might be more appropriate.
Before upgrading, it’s worth consulting with a heating engineer to assess your home’s specific needs.
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