LED bulbs use 75% less energy than incandescent bulbs - DOE
    Turning off lights when leaving saves $30-50/year per household - ENERGY STAR
    Standby power ('vampire load') can account for 5-10% of home energy use - DOE
    ENERGY STAR certified TVs use 25% less energy than standard models
    Programmable thermostats can save about 10% on heating/cooling - DOE
    Sealing air leaks can save 10-20% on heating and cooling costs - ENERGY STAR
    Heat pumps can reduce heating energy use by 50% vs. electric resistance - DOE
    Ceiling fans allow you to raise AC settings 4°F with no comfort loss - DOE
    Heating water accounts for about 18% of home energy use - DOE
    Low-flow showerheads save 2,700 gallons/year for a family of four - EPA
    Washing clothes in cold water can save $60+/year on water heating - ENERGY STAR
    Fixing a leaky faucet can save 3,000+ gallons/year - EPA
    ENERGY STAR refrigerators use 9% less energy than standard models
    Clean refrigerator coils annually for optimal efficiency - DOE
    Air-drying dishes instead of heat-dry saves 15-50% on dishwasher energy - DOE
    Proper attic insulation can cut heating/cooling costs by 15% - ENERGY STAR
    Windows can account for 25-30% of home heating/cooling energy use - DOE
    Window film can reduce solar heat gain by up to 70% - DOE
    Average US home solar system offsets 3-4 tons of CO₂ annually - EPA
    Solar panel costs have dropped 70%+ over the past decade - SEIA
    EVs cost about 60% less to fuel than gas vehicles - DOE
    Proper tire inflation improves gas mileage by 0.6% on average - DOE
    The average US household spends $2,000+/year on energy - EIA
    ENERGY STAR products have saved Americans $500 billion on energy bills
    LED bulbs use 75% less energy than incandescent bulbs - DOE
    Turning off lights when leaving saves $30-50/year per household - ENERGY STAR
    Standby power ('vampire load') can account for 5-10% of home energy use - DOE
    ENERGY STAR certified TVs use 25% less energy than standard models
    Programmable thermostats can save about 10% on heating/cooling - DOE
    Sealing air leaks can save 10-20% on heating and cooling costs - ENERGY STAR
    Heat pumps can reduce heating energy use by 50% vs. electric resistance - DOE
    Ceiling fans allow you to raise AC settings 4°F with no comfort loss - DOE
    Heating water accounts for about 18% of home energy use - DOE
    Low-flow showerheads save 2,700 gallons/year for a family of four - EPA
    Washing clothes in cold water can save $60+/year on water heating - ENERGY STAR
    Fixing a leaky faucet can save 3,000+ gallons/year - EPA
    ENERGY STAR refrigerators use 9% less energy than standard models
    Clean refrigerator coils annually for optimal efficiency - DOE
    Air-drying dishes instead of heat-dry saves 15-50% on dishwasher energy - DOE
    Proper attic insulation can cut heating/cooling costs by 15% - ENERGY STAR
    Windows can account for 25-30% of home heating/cooling energy use - DOE
    Window film can reduce solar heat gain by up to 70% - DOE
    Average US home solar system offsets 3-4 tons of CO₂ annually - EPA
    Solar panel costs have dropped 70%+ over the past decade - SEIA
    EVs cost about 60% less to fuel than gas vehicles - DOE
    Proper tire inflation improves gas mileage by 0.6% on average - DOE
    The average US household spends $2,000+/year on energy - EIA
    ENERGY STAR products have saved Americans $500 billion on energy bills
    LED bulbs use 75% less energy than incandescent bulbs - DOE
    Turning off lights when leaving saves $30-50/year per household - ENERGY STAR
    Standby power ('vampire load') can account for 5-10% of home energy use - DOE
    ENERGY STAR certified TVs use 25% less energy than standard models
    Programmable thermostats can save about 10% on heating/cooling - DOE
    Sealing air leaks can save 10-20% on heating and cooling costs - ENERGY STAR
    Heat pumps can reduce heating energy use by 50% vs. electric resistance - DOE
    Ceiling fans allow you to raise AC settings 4°F with no comfort loss - DOE
    Heating water accounts for about 18% of home energy use - DOE
    Low-flow showerheads save 2,700 gallons/year for a family of four - EPA
    Washing clothes in cold water can save $60+/year on water heating - ENERGY STAR
    Fixing a leaky faucet can save 3,000+ gallons/year - EPA
    ENERGY STAR refrigerators use 9% less energy than standard models
    Clean refrigerator coils annually for optimal efficiency - DOE
    Air-drying dishes instead of heat-dry saves 15-50% on dishwasher energy - DOE
    Proper attic insulation can cut heating/cooling costs by 15% - ENERGY STAR
    Windows can account for 25-30% of home heating/cooling energy use - DOE
    Window film can reduce solar heat gain by up to 70% - DOE
    Average US home solar system offsets 3-4 tons of CO₂ annually - EPA
    Solar panel costs have dropped 70%+ over the past decade - SEIA
    EVs cost about 60% less to fuel than gas vehicles - DOE
    Proper tire inflation improves gas mileage by 0.6% on average - DOE
    The average US household spends $2,000+/year on energy - EIA
    ENERGY STAR products have saved Americans $500 billion on energy bills
    Active
    UK
    General

    Energy Company Obligation (ECO4 & Flex) (United Kingdom)

    Mandatory utility-funded deep retrofits for vulnerable, fuel-poor, and low-income households in Great Britain.

    Available Amount

    Fully funded energy-saving measures for eligible low-income households (supplier obligation, no fixed grant amount)

    Start Date

    April 1, 2022

    End Date

    December 31, 2026

    Eligibility

    Homeowners or private tenants receiving qualified benefits, or meeting local authority fuel-poverty criteria (Flex).

    Eligible Upgrades & Scope

    Solid wall insulationFirst-time central heatingHeat pumpsSolar PVSmart thermostats

    October 2026 Update

    Ofgem confirms ECO4 was extended by nine months and now runs until December 31, 2026. ECO is a supplier obligation rather than a fixed-sum grant, and the government has confirmed there will be no successor supplier obligation; replacement funding is grant-based under the Warm Homes Plan.

    Policy Context & Overview

    Short Answer: ECO4 is a government-mandated program requiring major energy suppliers to fund comprehensive, multi-measure energy upgrades for low-income and vulnerable households.

    The Energy Company Obligation (ECO4) is the fourth iteration of the UK's premier fuel-poverty eradication initiative. Administered by Ofgem, ECO4 places a legal obligation on large energy companies to implement energy efficiency measures in households that are fuel-poor or vulnerable. Unlike single-measure schemes, ECO4 takes a "fabric-first, multi-measure" approach. It treats the home as a complete system, often combining insulation, heating upgrades, and microgeneration to achieve substantial, long-term carbon and cost savings.

    fabric-First Upgrades & Funding

    ECO4 is a fully funded scheme; eligible applicants pay nothing. The average value of upgrades per home ranges from £8,000 to over £25,000. Under the scheme's rules, the installer must improve the home's Energy Performance Certificate (EPC) by a specific margin:

    • Starting EPC Band F or G: Must be upgraded to at least Band D.
    • Starting EPC Band D or E: Must be upgraded to at least Band C.

    Eligible Upgrades Include:

    1. Solid Wall Insulation (External/Internal): Typically the first step to reduce heat loss.
    2. Loft and Cavity Wall Insulation.
    3. Low-Carbon Heating: High-efficiency air-source heat pumps to replace old boilers.
    4. Solar PV Panels: Installed if a heat pump is present to offset running costs.
    5. Smart Thermostats & Thermostatic Radiator Valves (TRVs).

    Eligibility Criteria & ECO4 Flex

    To qualify for ECO4, you must be a homeowner or a private tenant (with landlord consent) and meet one of the following criteria:

    • Benefit Eligibility: You receive one of the qualifying state benefits, such as:
      • Universal Credit
      • Pension Credit (Guarantee or Savings Credit)
      • Income Support / Jobseeker's Allowance
      • Housing Benefit
      • Child Tax Credit / Working Tax Credit
    • ECO4 Flex Route: If you do not receive benefits, your local authority (council) can qualify you under "Flex" rules if:
      • Your gross household income is under £31,000 per year, or
      • A household member has a cardiovascular, respiratory, or mobility condition vulnerable to cold homes.

    Step-by-Step Application Guide

    1. Apply via Installer or Supplier: Contact a registered ECO4 installer or apply through a major energy supplier's online portal.
    2. Initial Assessment: The provider checks your benefit status or coordinates with your local council for Flex approval.
    3. Full Retrofit Assessment: A qualified Retrofit Assessor surveys the property and drafts a comprehensive energy improvement plan.
    4. Installation Phase: Certified contractors install the insulation, heat pump, and solar panels.
    5. Post-Installation Validation: An independent audit confirms the required EPC improvement has been met.

    Frequently Asked Questions

    • Q: Can private tenants apply?
      • A: Yes. Private tenants are eligible, but the landlord must give written consent. Furthermore, landlords of properties with EPC ratings of F or G must have already met their legal minimum standards before tenant-led funding can be authorized.
    • Q: Are there any costs to pay?
      • A: No. If you qualify for ECO4, all assessments, materials, and labor are fully funded.

    Ready to Apply?

    Visit the official program website to check your eligibility, find application forms, and get the most up-to-date information.

    Visit Official Program Site

    Other Programs You May Qualify For

    Active

    Boiler Upgrade Scheme (BUS) (United Kingdom)

    Government subsidies helping homeowners in England and Wales replace fossil fuel heating with low carbon systems.

    £7,500 for air or ground source heat pumps; £5,000 biomass; £2,500 air-to-air heat pumps; plus £1,500 until March 2027 for off-gas-grid homes heated by oil or LPG

    Expired

    Great British Insulation Scheme (GBIS) (United Kingdom)

    The Great British Insulation Scheme (GBIS) funded free or low-cost single-measure insulation: cavity, loft, solid wall, and underfloor upgrades via energy suppliers. The scheme has ended: the eligibility service has closed and installations had to be complete by March 31, 2026. Successor support sits under the Warm Homes Plan, including the Warm Homes: Local Grant.

    Up to 100% of installation cost

    Active

    Warm Home Discount Scheme

    A £150 one-off discount applied directly to the electricity bill each winter for eligible low-income households. For winter 2026/27 the scheme reopens in October 2026, with eligibility based on means-tested benefit receipt on 23 August 2026. Most recipients in England and Wales get it automatically; some households in Scotland apply through their supplier.

    £150 one-off discount on the electricity bill for winter 2026/27

    Active

    Warm Homes: Local Grant

    A £500 million England-only grant delivered through local councils that pays for free home energy improvements - insulation, air-source heat pumps, solar panels and smart controls - for lower-income households in inefficient private homes. Councils arrange a survey, agree the works and pay for them; the householder pays nothing.

    Free energy-saving improvements, organised and paid for by the local council

    Important: Educational Purposes OnlyThe guides, tools, cost estimates, and ROI calculators provided on EnergyBS.com are for informational and educational purposes only. They do not constitute certified financial, tax, or professional engineering advice. Energy costs, government rebates, and installation fees vary significantly by location and are subject to change. Always consult with certified local professionals before undertaking home energy projects or making financial commitments.