Which Non-Condensing Gas Boiler Replacement Grants is Best for UK Homes?


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If you have a non-condensing gas boiler that’s not working well, you might get a free new boiler. With the Energy Company Obligation (ECO4) scheme, you might get a brand-new, efficient boiler at no cost. This helps eliminate non-condensing boilers in the UK. Plus, we’ll do an energy survey of your whole house for free to ensure everything works well. Once you replace your non-condensing boiler with its condensing counterpart, you could save up to £300 a year in heating costs

This blog covers what a non-condensing gas boiler is, why the government has banned this type of boiler and how to replace it through eco4 government grants.

Condensing vs. Non-Condensing Boilers


Boilers come in two main types: condensing and non-condensing. Non-condensing boilers are the older kind. They waste a lot of energy because they release hot gases up the chimney.  Plus, they cost excessive billing. Condensing boilers, on the other hand, capture this heat and use it to warm your home more efficiently. Moreover, the government has banned all non-condensing boilers in the country. Now, you no longer can install this type of boiler. You’ve to face a penalty.

On top of that, if everything seems fine but the problem persists, you should get in touch with the people who made your boiler. A professional engineer might need to take a look. They can find and fix any internal issues with your boiler, like a broken valve or diaphragm.

How does a Non-Condensing Gas Boiler Work?

This boiler burns gas to heat water. This hot water then circulates through your radiators or underfloor heating. As a result, it warms your home. But you must not forget these boilers waste a lot of energy. Instead of using all the heat they create, these machines simply release a lot of it up the chimney as hot exhaust gases. It’s in fact,  like throwing away money – literally burning fuel without getting the full benefit of its warmth.

To fix it, first, check the pressure gauge on your boiler. If it’s below 1, that’s likely the problem. Also, look around your boiler for any leaks. If you find any, call an expert to help. Moreover, if there are no leaks, you can reset the boiler pressure. Just follow the instructions in the manual.

What are the Demerits of a Non-Condensing Gas Boiler?

There are several downsides to keeping this boiler:

High energy bills: Since these boilers waste heat, they cost you more to run. Moreover, with gas prices on the rise, those energy bills can really add up.

Harmful for the environment: All that wasted heat constitutes to greenhouse gas emissions. This isn’t great for our planet.

Outdated technology: The technology used in these boilers has become outdated. Moreover, it isn’t compatible with the latest heating apparatus such as smart thermostats, etc.


Non-Condensing Boiler

Condensing Boiler

Price (Boiler Unit Only)

£500 – £1,000

£700 – £1,500

Installation Cost

£400 – £600

£500 – £700

Labour Cost

£200 – £300

£200 – £300

Gas Consumption

High (Can be 20-30% more)


Energy Efficiency

Up to 80% AFUE (Annual Fuel Utilisation Efficiency)

Up to 95% AFUE (Very Efficient)


10-15 years

15-20 years (Can last longer due to fewer moving parts)

Government Grants

Not eligible

Eligible for boiler replacement grants

Environmental Impact

Higher CO2 emissions

Lower CO2 emissions

Running Costs

Higher due to lower efficiency

Lower due to higher efficiency

Non-Condensing Gas Boiler Replacement Grants

If you’re still using a non-condensing gas boiler, you could be eligible for an eco4 boiler replacement grant. The government offers these grants to help low-income households to be more energy-efficient. It wants them to save energy, reduce their carbon footprint and cut their heating costs. So if you qualify, you’ll get an A-rated condensing model. These boilers boast more efficiency. Moreover, they’re eco-friendly to a greater extent. Now, the ECO4 scheme is a giant boiler replacement program. It has £1 billion of funding to help low-income households with energy efficiency improvements, including boiler replacements. So if you haven’t applied yet, we can help you to get the grant.

Who Qualifies for a Grant?

Well, the exact eligibility criteria can vary depending on the grant scheme and the specific provider, but here’s a general idea:

  • Your boiler must be a non-condensing model.
  • You must be a homeowner in England, Wales, or Scotland.
  • You may need to be receiving certain benefits or meet income requirements for some schemes.
  • If you have a low income, you might be eligible.

List of Qualifying Benefits

  • Employment & Support Allowance (ESA)
  • Income Support Allowance (ISA)
  • Working Tax Credit (WTC)
  • Child tax credit (CTC)
  • Universal Credit (UC)
  • Pension savings Credit
  • Pension Guarantee Credit
  • Child benefit
  • Housing benefit

How to get started?

Now, if you receive any government benefits listed above, you’re almost there. Here are the steps to follow:

Firstly, check if your boiler is non-condensing. You can usually find the model number on the boiler itself. Then, enter your postcode here (Please create the link here) to see if you qualify. Don’t wait too long! Eco Energy Services can run out, so it’s best to get started as soon as possible.

There is no doubt replacing your old boiler with a new, energy-efficient model can save you hundreds of pounds a year on your heating bills.  Plus, with the help of a government grant, it can be a very affordable upgrade. So why wait? Start your journey to a warmer, more energy-efficient home today!

The Bottom Line

Non-condensing gas boiler replacement grants help homeowners and renters alike. Plus, they’re equally useful for pensioners and over 60s. So if you qualify, you might get a free replacement of your older non-condensing boiler with a more energy-efficient condensing model. 

Next, the government under its ECO4 scheme is changing heating habits of UK citizens. It is phasing out all types of boilers. Moreover, it has banned all non-condensing boiler models in the country. Consequently, it is now illegal to install non-condensing models in new homes. 

If you want to get rid of a non-condensing gas boiler, the best way to do so is eco4 free boiler grants. The application process is simple. You or anyone living in your home must be the recipient of government benefits. Plus, your EPC rate must be lower than D. So say goodbye to high heating costs and save energy.

Get Your ECO4 Grant

Simply enter your postal code and answer a few questions, we’ll handle the rest!

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