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Why Non-Condensing Boiler Replacement is a Smart Choice

When you’re thinking about getting a new boiler in Scotland Wales, England, you’ve got a lot of options to consider. One big difference is whether you go for a condensing or non-condensing boiler replacement in UK. In the day, non-condensing boilers were popular, but now it’s the law to switch to condensing ones when you upgrade.

At Free Boiler Scheme, picking a condensing boiler comes with a bunch of benefits you might not have had with a non-condensing one. First off, they’re way more efficient. Condensing boilers can be up to 99% efficient, while non-condensing ones usually hover around 78%. And that’s not all – there are other cool benefits too. Upgrading to a modern condensing boiler from your old non-condensing one could make a real difference.

Let’s dig deeper to find out its benefits.

When it comes to swapping out your old Non-Condensing Boiler Replacement in UK for a new condensing one, the main reason we suggest is all about efficiency!

Read More: Boiler Upgrade Scheme in Scotland

Lower Fuel Bills

Better efficiency means lower fuel bills, especially important with the recent uptick in gas prices. Condensing boilers use heat that would usually go to waste, making them super efficient – around 99%! This translates to less fuel needed and significant savings on your bills. For example, a bungalow could save £170 per year, and a detached property might see a yearly reduction of around £580.

Going Green

If you’re into reducing your carbon footprint, think about your boiler’s impact on the environment. While going 100% renewable might not be feasible for everyone, upgrading to a more efficient boiler can still make a difference. A condensing boiler has a much lower carbon footprint compared to an old, inefficient non-condensing one. You could cut emissions by up to 1,200 kg of carbon per year.

Safety Improvements

Safety first! Condensing boilers are a safer option compared to old Non-Condensing Boiler Replacement in UK ones. They’re sealed units, better in terms of heat insulation, and less prone to dirt or debris entering. Concerns about poisonous substances circulating in your home are also reduced, thanks to a pipe that directs waste liquid outside.

Space Requirements

Condensing boilers are space savers! Unlike older units, they don’t need as much room. If you go for a condensing combi boiler, you won’t have to worry about finding a spot for a massive water tank. This gives you more flexibility in placing the boiler around your home. You could even free up some cupboard space – a condensing boiler can snugly fit into kitchen cupboards, loft spaces, utility room cupboards, downstairs cloakrooms, hallways, or spare bedrooms. Talk to your engineer to find the best spot for your new unit to maximize space.

While the advantages of upgrading to a condensing boiler are substantial, it’s important to be aware of some potential downsides before making the switch.

Read More: Non-condensing Boiler Grants


Condensing boilers are more intricate compared to old Non-Condensing Boiler Replacement units. Their systems are more complicated, contributing to their higher efficiency. However, this complexity can pose challenges. In extremely cold weather, some condensing boilers may stop working due to external pipes freezing. Although there are short-term solutions, homeowners should be mindful of this issue in winter. Additionally, condensing boilers may face corrosion due to the acid condensate buildup, especially after extended use. However, the risk is minimal compared to the efficiency gains.

Cost Implications

The installation of a new boiler in Dundee, Cardiff, and Newport is a significant investment, and condensing boilers can be slightly more expensive to maintain than their non-condensing counterparts. This is attributed to their complexity and the generally higher cost of replacement parts. Despite these costs, the investment is often justified. The reduction in fuel bills and the extended service life of the new boiler without requiring expensive repairs make it a worthwhile investment in the long run.


In conclusion, while there are a few drawbacks to consider, the benefits of switching to a condensing boiler, such as improved efficiency, lower fuel bills, environmental impact, safety, and space savings, often outweigh these concerns. If you’re contemplating replacing your old boiler with a modern condensing unit, it’s recommended to consult with our qualified engineer who can assess your specific needs and guide you through the process. Ensuring a smooth installation and optimal performance. Feel free to reach out to our team for personalized advice and assistance.

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