ECO4 Scheme UK: What Is It & How Do You Apply?
ECO4 (the Energy Company Obligation) is a UK programme that funds energy efficiency and heating improvements—aimed primarily at reducing fuel poverty and improving low efficiency homes. It’s often talked about as “free boiler grants”, but in reality ECO4 is usually a package approach: insulation, controls, and heating upgrades together. This guide explains what ECO4 is, who may qualify, what you can get, how to apply, and what installers must do.
What Is the ECO4 Scheme?
ECO4 places an obligation on larger energy suppliers to deliver energy efficiency measures to eligible households. The goal is to reduce energy consumption and improve comfort—especially in hard-to-heat homes.
ECO4 Eligibility (High-Level)
Eligibility can depend on household circumstances, benefits/income criteria, and local authority routes. It can also depend on the property’s efficiency and what measures are appropriate. Because rules evolve, treat any online “instant approval” claims cautiously until a proper assessment is completed.
What Can You Get Through ECO4?
Measures vary by property, but commonly include insulation improvements, heating controls, and heating system upgrades. In some cases, a boiler replacement may be included, but ECO4 often focuses on reducing heat loss first (insulation) so the heating system can be smaller and run more efficiently.
- Loft and wall insulation
- Heating controls (thermostats, programmers, TRVs)
- Boiler upgrades (where appropriate)
- Other efficiency measures depending on property type
How to Apply for ECO4
Application typically starts with an eligibility check and property assessment. You may be referred through your energy supplier, an installer network, or a local authority route. Expect a survey and documentation requests. Always get a written scope of work and confirm who is responsible for aftercare and warranty.
What Installers Must Do (Quality and Compliance)
Installers should carry out surveys, recommend suitable measures, and complete work to relevant standards. For boiler work, you should still use a Gas Safe engineer and ensure commissioning, controls setup, and documentation are completed properly.
If a Boiler Upgrade Is Included, Size It Right
ECO4 measures can reduce heat loss, which can change the ideal boiler kW output. Use our calculator to estimate a sensible range before agreeing to a replacement.
Use the Boiler Size CalculatorFrequently Asked Questions
Is ECO4 a free boiler scheme?
ECO4 can fund heating upgrades for eligible households, but it’s broader than boilers and often involves a package of measures. Eligibility and contributions vary.
Who qualifies for ECO4?
Qualification depends on household circumstances and property factors. Local authority routes may apply. Always confirm via an official or reputable assessment.
What measures does ECO4 cover?
Common measures include insulation and heating controls, and in some cases heating system upgrades. The exact package depends on what the property needs.
How long does an ECO4 application take?
Timelines vary by provider and survey availability. Expect multiple steps: eligibility check, survey, approval, and scheduling installation work.
How do I avoid ECO4 scams?
Avoid high-pressure sales. Verify installer credentials, insist on a survey and written scope, and confirm the scheme route and aftercare arrangements.