First-Time Central Heating vs an ECO4 Boiler Grant: Which Route Applies to Your Home?
If your home is difficult or expensive to heat, you may be comparing a First-Time Central Heating grant with an ECO4 boiler grant. Although both can fund heating improvements, they apply to different properties.
First-Time Central Heating, usually shortened to FTCH, is intended for a home that has never previously had a wet central-heating system. An ECO4 boiler upgrade or replacement applies when a property already has central heating, but its boiler meets specific efficiency, condition and repair criteria.
This guide explains which route may apply, what each installation includes, how eligibility is assessed and what householders should check before agreeing to any work.
Get a free eligibility check: Simple Green Energy can review your household circumstances, EPC and existing heating system before arranging a property survey. Funding remains subject to assessment, supplier approval and availability.
Check your ECO4 eligibility
Answer a few quick questions to see whether your household may qualify for ECO4 support.
Quick answer
First-Time Central Heating is normally the correct ECO4 route when a property has never had a wet heating system with radiators and circulating hot water. It may apply to homes relying on plug-in electric heaters, gas room heaters or certain inefficient storage heaters.
An ECO4 boiler grant is more relevant when the property already has radiators and pipework but its boiler is inefficient, broken or uneconomical to repair under ECO4 rules.
ECO4 is not a cash grant paid directly to a householder. Energy suppliers decide which eligible projects they will fund and how much support they provide, so meeting the basic household criteria does not guarantee an installation.
First-Time Central Heating vs an ECO4 boiler grant
| Factor | First-Time Central Heating | ECO4 Boiler Upgrade or Replacement |
|---|---|---|
| Existing heating | No previous wet central heating | Existing boiler, radiators and pipework |
| Typical work | Heat source, pipework, radiators and controls | Boiler repair, upgrade or replacement, controls and associated measures |
| Best for | Homes using room heaters or qualifying inefficient electric heating | Homes with an eligible inefficient or broken boiler |
| Disruption | Higher because new pipework and radiators are required | Usually lower where the system layout is retained |
| Main evidence | The property must never have had wet central heating | Boiler type, efficiency, condition and repair assessment |
| Common reason for refusal | Evidence of old radiators, pipes or a previous wet system | Boiler does not meet the relevant technical rules |
What is First-Time Central Heating under ECO4?
Ofgem defines FTCH as installing a wet central-heating system in a property that does not have, and has never previously had, one. A wet system circulates heated water from a boiler or another heat source to separate emitters such as radiators.
Evidence that a system previously existed can include:
- Old radiators or radiator brackets
- Heating pipework
- A removed boiler or flue
- Heating controls
- Previous EPC records
- Photographs from old property listings
A property is not normally eligible for FTCH simply because its previous boiler and radiators have been removed. Ofgem specifically states that a property which had wet central heating in the past is not eligible for FTCH.
Best for
FTCH is most appropriate for homes relying on individual heat sources rather than whole-home heating. Examples can include electric panel heaters, fan heaters, gas room heaters and certain inefficient electric storage heaters.
What may be installed?
A qualifying project can include:
- An eligible boiler or renewable heat source
- Radiators sized for each room
- New heating pipework
- Thermostatic radiator valves
- A programmer and room thermostat
- System balancing and commissioning
- Relevant insulation and ventilation improvements
Depending on the property, an eligible heat source could include a condensing gas boiler in an on-gas home, an air-source heat pump, a ground-source heat pump or a biomass boiler.
Things to consider
FTCH is normally more disruptive than a boiler replacement. Floors may need lifting, walls may require drilling and visible pipe routes may be necessary. Homeowners should establish whether flooring repairs, boxing-in, plastering and redecoration are included.
Example: A two-bedroom terrace uses plug-in electric heaters and has no boiler, radiators or evidence of an earlier wet system. Following a retrofit assessment, an ECO4 project could potentially include insulation, a suitable heat source, radiators, controls and new pipework.
What is an ECO4 boiler grant?
“ECO4 boiler grant” is widely used by consumers, but ECO4 is technically an obligation placed on energy suppliers rather than a guaranteed government grant.
Suppliers decide which projects to fund, which installers to use and whether a household contribution is required. Different suppliers may therefore offer different outcomes for the same property.
The boiler route normally applies where a wet central-heating system already exists.
An inefficient heating system, such as an eligible non-condensing boiler, may be upgraded to a more efficient system. A broken efficient boiler may qualify for repair or replacement where it satisfies the scheme’s assessment and funding-cap rules.
Best for
This route may suit an owner-occupied property that has:
- Existing radiators and heating pipework
- An old non-condensing boiler
- A boiler that has been assessed as broken
- A boiler that cannot be economically repaired
- An eligible EPC rating and qualifying household
Boiler age alone does not establish eligibility. A boiler cannot automatically be replaced simply because it is 15 or 20 years old.
Things to consider
A working modern condensing boiler is unlikely to qualify solely because the householder would prefer a newer model.
There are also tighter restrictions in private rented properties. Standard boiler repair or replacement is generally not available in the same way as it is for owner-occupied homes, although FTCH, renewable heating and district-heating measures can be permitted.
Example: An owner-occupied semi-detached home has radiators and an old non-condensing boiler. The household meets the financial criteria, and an assessment confirms that the boiler can be upgraded as part of a wider package that also addresses insulation.
How do you know which option applies?
Work through these questions in order:
- Has the property ever had radiators and a wet heating system?
If yes, FTCH will normally not apply. - Is there an existing boiler connected to radiators?
If yes, a boiler upgrade, repair or replacement assessment is more relevant. - Does the home rely only on individual room heaters?
FTCH may be possible, provided no previous wet system existed. - Is the existing boiler non-condensing or broken?
Its type and condition will determine whether it could qualify. - Does the household and property meet ECO4 requirements?
Both the occupants and the building must be eligible.
Owner-occupied homes receiving a qualifying benefit generally require an EPC rating of D, E, F or G. Private rented homes generally need an E, F or G rating and the landlord’s permission. Qualifying benefits include Universal Credit, Pension Credit, Income Support, income-related ESA or JSA, Housing Benefit and qualifying Child Benefit claims.
ECO4 Flex can provide another route. It may include households with gross annual income below £31,000 or someone with a severe or long-term health condition that is adversely affected by living in a cold home. Local authority participation and criteria vary.
Costs, savings and possible contributions
| Route | Indicative private cost | ECO4 position | Main cost factors |
|---|---|---|---|
| Full gas central heating from scratch | Approximately £4,500–£6,000; average around £5,250 | Could be fully or partly funded where FTCH and project rules are satisfied | Property size, radiator count, pipe routes, controls, access and making good |
| Gas boiler replacement | Energy Saving Trust average around £3,500 | Could be funded if the boiler and complete project meet ECO4 rules | Boiler type, flue, controls, relocation, system condition and remedial work |
The figures above are general market estimates, not quotations. A survey is needed to establish the actual scope.
ECO4 has been extended to 31 December 2026, but the extension did not increase supplier targets. It primarily gives suppliers additional time to complete existing obligations and address non-compliant work. Funding may consequently be limited and availability can vary between suppliers, installers, locations and measures.
Do not assume an installation will be completely free until you receive written confirmation covering:
- The measures being funded
- Any customer or landlord contribution
- Work excluded from the installation
- Flooring and decorative repairs
- Warranties and guarantees
- Aftercare responsibilities
- Cancellation and complaint procedures
How to choose the correct heating route
- Check the EPC. Confirm its rating and whether its description of the heating system is accurate.
- Document the existing heating. Photograph boilers, heaters, radiators, pipework and controls before anything is removed.
- Check household eligibility. Review benefits, household income, tenure and local ECO4 Flex criteria.
- Arrange a retrofit assessment. ECO4 takes a whole-house approach rather than treating every application as a boiler-only project.
- Review insulation requirements. Relevant loft, roof or cavity-wall insulation may need to be completed before the heating measure.
- Ask for the system design. Confirm heat-source sizing, radiator outputs, pipe routes and heating controls.
- Check every document. Funding, customer contributions, warranties, guarantees and exclusions should be provided in writing.
- Plan for maintenance. Boilers generally require regular servicing, and annual servicing is commonly required to preserve manufacturer warranty cover.
Why the installer matters
Good equipment can still perform poorly when it is incorrectly selected or installed. Oversized boilers, undersized radiators, unbalanced pipework, unsuitable controls and inadequate system cleaning can result in uneven temperatures, noise, excessive energy use and early component failure.
ECO4 installers must work within the relevant quality framework. Applicable measures must meet PAS requirements and be lodged through TrustMark. Gas boiler work must be completed by an appropriately qualified Gas Safe registered engineer.
For a complete new system, ask for:
- Room-by-room heat-loss calculations
- Correct radiator sizing
- Hydraulic balancing
- Flushing and water treatment
- Commissioning records
- Building Regulations documentation
- Manufacturer instructions
- A demonstration of the heating controls
- Written aftercare and complaint information
Installation quality affects performance, safety, warranty protection, reliability and the system’s usable lifespan.
High-intent buyer questions
Which route offers the better deal?
Neither route is automatically better. The property’s heating history determines which measure is valid. FTCH may fund more equipment because a complete system is required, but it cannot normally be used where wet central heating previously existed.
Will ECO4 pay the full cost?
Not necessarily. Some approved installations are fully funded, while others require a customer or landlord contribution. A supplier may also decline an otherwise eligible project.
Will a new system reduce my bills?
It may, particularly when replacing inefficient direct electric heating or an old non-condensing boiler. Actual savings depend on fuel prices, insulation, controls, system sizing, occupancy and heating habits.
Does it work properly in winter?
A correctly designed central-heating system should maintain suitable indoor temperatures during winter. Insulation, radiator sizing and accurate heat-loss calculations are essential.
Can the system be made heat-pump ready?
Yes. Larger radiators, suitable pipe sizing and lower design flow temperatures can make a later heat-pump conversion easier. Discuss future heating plans before the system is designed.
Frequently asked questions (FAQs)
Clear answers about First-Time Central Heating, previously removed systems, electric heaters, storage heaters, boiler eligibility, private tenants, EPC ratings and ECO4 Flex. Speak to Simple Green Energy .
Could your home qualify for First-Time Central Heating?
Speak with Simple Green Energy about your existing heating, household eligibility, EPC rating, property tenure, storage heaters and the ECO4 measures that may be available.
Check my FTCH eligibilityConclusion: appearance or performance?
First-Time Central Heating is intended for a property that has never had wet central heating. An ECO4 boiler upgrade or replacement is intended for a home with an existing system and a boiler that satisfies specific technical criteria.
Accurate information about the property’s heating history is essential. Removing an old boiler or radiators does not make a home eligible for FTCH, while owning an old boiler does not automatically qualify the household for a replacement.
The next step is a complete eligibility and property assessment—not simply selecting the measure that appears to provide the most funding.
Book a free home survey: Simple Green Energy can check whether your home is more likely to qualify for First-Time Central Heating, an ECO4 boiler measure or another suitable energy-efficiency package.
