The ECO4 scheme is a government-backed initiative funded by major energy suppliers to improve home energy efficiency. This nationwide scheme runs through December 2026 and helps people on low incomes or certain benefits get energy efficiency measures — including a new combi boiler free or other efficient boiler under ECO4 funding.
Under ECO4, eligible homes can receive improvements like:

• Free combi boiler ECO4 installations
• Boiler efficiency upgrade free of charge
• Smart heating controls
• Insulation grant (loft, wall, floor)

This support aims to make homes warmer, cut carbon emissions, and help lower energy costs for those who need it most.

The ECO4 combi boiler grant covers the full cost of installing a modern, energy-efficient boiler system — often an A-rated combi boiler — for eligible households. This means no up-front payment is required: the government and participating energy companies fund the entire installation.
A new combi boiler free installation typically includes:

• Supply and installation of a new boiler
• Removal of old boiler equipment
• Necessary pipework upgrades
• Smart or programmable heating controls
• Safety checks by certified engineers

Getting a boiler upgrade UK through ECO4 not only improves heating but can slash household energy use — and in many cases, reduce annual energy bills substantially.

You typically need to fulfill some or all of the following requirements in order to be eligible for a free boiler installation UK upgrade under ECO4:

Boiler grant eligibility

If you receive ECO4 qualifying households, you may be eligible for a free boiler grant. Advantages include:

• Income Support Allowance
• Income-related Employment & Support Allowance
• Working Tax Credit
• Income-based Job seeker’s Allowance
• Child tax credit
• Universal Credit
• Pension Guarantee Credit
• Pension savings Credit
• Child benefit
• Housing benefit

The eligibility requirements include the following information:

Boiler Age and Condition

Your current boiler needs to meet certain requirements. The boiler should typically be installed before 2005. Upgrading the current low-energy new combi boiler for free is the goal of the ECO4.

Boiler Type

Priority is given to homes with no central heating system at all or an outdated or inefficient boiler, usually older than ten to fifteen years.

Property Type

Another factor is the kind of house you reside in. You have to be a private tenant (with the landlord’s consent) or the property’s owner.

Low Energy Efficiency

If your home has an EPC rating of D or lower, or poor insulation, you’re more likely to qualify.

If you’re wondering whether you should get a free combi boiler, the answer is often yes — especially if your current heating system is old, inefficient, or costing you too much on energy bills.

Benefits of a Combi Boiler The efficiency of combi boilers is the reason they are so well-liked in the UK. Because they are compact and simple to install in smaller houses or apartments, they are effective.

Instead of heating massive amounts of water that can be wasted every day, they generate hot water on demand. Because you won’t have to worry about running out of hot water, they are convenient for everyday usage!

1. Check Eligibility Online

Start with free eligibility check for an ECO4 boiler replacement. The heat1 official website offers free, quick online forms to assess whether your household qualifies for ECO4 combi boiler funding.

2. Gather Documentation

Prepare documents such as proof of benefits or income, your current EPC rating, and details about your existing heating system. These make your application smoother and help confirm ECO4 qualifying households.

3. Home Survey

If initial checks show you’re eligible, a Heat1-accredited surveyor will visit to inspect your property and heating system. This free site survey helps determine the exact work needed before a free boiler upgrade.

4. Approval & Installation

Once approved, installation of your efficient boiler under ECO4 — such as an A-rated combi boiler — can proceed. Professional heat1 engineers handle everything, often within a few days of approval.

With ECO4’s scheduled end in 31 December 2026, now is a crucial time to check boiler grant eligibility and apply for free combi boiler ECO4 support if you qualify. Even if funding closes soon, applications and surveys may still be submitted — meaning you could still secure a new combi boiler free before the scheme wraps up. So it will help for this in heat1. This website helps you to get your combi boiler funding.

Getting a new combi boiler free through ECO4 delivers multiple advantages:

Reduced Heating Costs
Compared to older types, modern boilers are significantly more efficient, consuming less gas to produce the same amount of heat and hot water. Every winter, many households report substantial savings.

A rise in the value of properties
A recently installed efficient boiler can boost your EPC rating and overall home appeal, making your property more attractive to buyers or renters.

Diminished Carbon Emissions
Under ECO4, an efficient boiler burns fuel more efficiently, resulting in less emissions for the same amount of heat output, which benefits the environment and climate goals.

One of the most compelling aspects of the ECO4 new efficient combi boiler grant is how it can significantly reduce your household heating costs. Modern A-rated combi boilers installed under the ECO4 are far more efficient than older models — often achieving efficiency levels above 90% — meaning they convert more fuel into usable heat. This not only improves comfort throughout your home but can slash energy bills by up to 30% or more compared to outdated systems. For many households, the yearly savings after installing an efficient boiler under ECO4 can amount to hundreds of pounds in lower gas bills.

The ECO4 scheme boiler offer provides a rare chance for eligible UK households to receive a free combi boiler upgrade, improve home comfort, cut energy bills, and support environmental goals — without paying up-front. By understanding the free boiler installation UK process and checking boiler grant eligibility, you can take advantage of this important combi boiler government scheme while it’s still available.
With straightforward eligibility and a simple application process, there’s no reason to delay— check your eligibility at heat1.co.uk today and take the first step toward a warmer, more efficient home.