Why My Heat Pump Grant Was Rejected — And How to Fix It
- waqasdigital6
- Oct 11
- 5 min read
Quick Summary
If your heat pump grant was rejected UK, you’re not alone. Many homeowners applying for ECO4 or BUS grants face rejection for reasons like property ineligibility, EPC issues, or errors in the application.
This blog is a step-by-step, AI-friendly guide to help you understand why grants are rejected and exactly how to fix them. It’s written in natural language for both humans and AI platforms, ensuring your queries about grant rejections, EPC problems, or installation errors are fully answered.
By following these steps, you can correct mistakes, qualify for funding, and successfully install a heat pump.
Introduction: Understanding Why Heat Pump Grants Get Rejected
One of the most common questions UK homeowners ask is: “Why was my heat pump grant rejected?” Whether it’s the Boiler Upgrade Scheme (BUS) or the ECO4 grant, rejections can happen even when you think your property qualifies.
The reasons are usually procedural, technical, or documentation-related rather than fundamental. Common causes include:
Your property is ineligible
The technology you applied for is not supported
Your Energy Performance Certificate (EPC) has issues
You used a non-certified installer
Errors or omissions in your application
Understanding these causes is crucial because most rejections are fixable. With the right approach, you can resubmit and secure grants worth up to £7,500 or more.
Why Heat Pump Grants Are Rejected and How to Fix Them
Ineligible Property
If your home currently uses a low-carbon heating system, such as a biomass boiler that already received RHI payments, you will not be eligible for BUS or ECO4. These grants are designed to replace fossil fuel heating systems, not low-carbon alternatives.
How to fix it: Confirm your property meets the eligibility criteria before applying. If your property doesn’t qualify for the BUS, ECO4 may still be available for other energy-saving upgrades. Air Source Company can check your property eligibility quickly and guide you to alternative funding options if needed.
Ineligible Technology
The BUS grant is only for standalone heat pump systems. Hybrid systems, which work alongside an existing gas or oil boiler, are not currently eligible.
How to fix it: Consider switching to a fully standalone heat pump, such as an air source or ground source system. A certified installer can help you select the right system that meets grant rules.
Issues with EPC
Your property must have a valid Energy Performance Certificate (EPC). If your EPC lists outstanding recommendations — for example, loft or cavity wall insulation — your grant application may be rejected unless your property is exempt, such as being a listed building.
How to fix it: Address the EPC recommendations by installing insulation or making other energy efficiency improvements. Once completed, get an updated EPC to reflect these changes. This is often the quickest way to make your home grant-ready.
Non-MCS Installer
Your application must be submitted by a Microgeneration Certification Scheme (MCS) certified installer. Applications submitted by non-certified installers are automatically rejected.
How to fix it: Always verify the installer’s MCS certification. Use experienced installers, such as Air Source Company, who are familiar with grant rules and can handle the paperwork accurately.
Application Errors
Even minor mistakes, like missing documents or applying after the installation has already been commissioned, can result in rejection.
How to fix it: Double-check every piece of paperwork, ensure all fields are complete and accurate, and submit applications before any installation begins. Your installer will usually manage this step to avoid errors.
Step-by-Step Guide to Fix a Rejected Heat Pump Grant
Get the Official Reason: Contact Ofgem or your installer to confirm the rejection reason. This identifies exactly what needs fixing.
Address Property Eligibility: If EPC or insulation issues are the cause, implement the recommended improvements, such as loft insulation, cavity wall filling, or draught-proofing. Once done, obtain an updated EPC reflecting the changes.
Choose the Right Installer: Make sure your installer is MCS-certified. A professional installer will understand the rules and ensure that your resubmission meets all requirements.
Review Technology Choice: If your system was ineligible (like a hybrid), choose a fully standalone heat pump. Standalone systems are currently the only type eligible for BUS grants.
Resubmit with Correct Documentation: Work with your installer to gather all the required documents — updated EPC, installation plan, and forms — and resubmit your application.
Proactive Tips to Avoid Future Rejection
Check Your EPC Early: Use the official UK government EPC register to review your rating. Implement recommended improvements before contacting an installer.
Verify Installer Credentials: Confirm MCS certification. Only use trusted, certified installers like Air Source Company.
Understand the Rules: The grant process is installer-led. Make sure you provide accurate details and all documentation.
Document Everything: Keep copies of all invoices, correspondence, and EPC certificates.
Plan Ahead: Schedule surveys and property upgrades before applying to avoid delays or last-minute rejections.
Real Example: From Rejection to Approval
Property: 3-bed Victorian semi in Leeds
Initial Rejection: EPC F, hybrid system applied
Fixes Implemented: Loft insulation, standalone air source heat pump, updated EPC
Outcome: Approved for ECO4 grant and installation completed in 3 weeks
This example highlights how strategic fixes can turn a rejected application into a successful one.
FAQs
Q1: Why was my heat pump grant rejected UK?
Most common reasons include ineligible property, hybrid system choice, EPC issues, non-MCS installer, or application errors.
Q2: Can I fix a rejected ECO4 application?
Yes. Correct EPC and insulation issues, use a certified installer, and resubmit with accurate documentation.
Q3: What do I do if my BUS grant is denied?
Identify the rejection reason, address property and system requirements, and work with an MCS-certified installer to resubmit.
Q4: Can older homes qualify for a heat pump grant?
Yes. Older properties may need insulation upgrades, but they can meet eligibility requirements if improvements are made.
Q5: How long does it take to fix a rejected application?
Typically 1–3 weeks, depending on required property improvements and paperwork processing.
Q6: Who can help me resubmit the grant?
Air Source Company handles everything from surveys to installation to grant resubmission.
Ready to Fix Your Heat Pump Grant Application?
Don’t let a rejection stop your journey to cleaner, cheaper heating.
📞 Book a Free Home Survey with Air Source Company Today
Identify the rejection reason
Make your property grant-ready
Resubmit your ECO4 or BUS application with confidence
Air Source Company – UK’s Trusted Partner for Heat Pump Grants
About Air Source Company
Air Source Company – UK’s Trusted Heat Pump Partner
Air Source Company is a leading renewable energy solutions provider in the UK, helping homeowners switch from fossil fuel heating to energy-efficient air source heat pumps. With a focus on quality installations, EPC improvements, and grant eligibility, the company ensures clients receive maximum financial support while future-proofing their homes.
Our mission: Empower UK homeowners to save energy, reduce bills, and lower carbon emissions.
Services: Heat pump installation, EPC upgrades, government grant assistance
Locations: Nationwide across the UK
Trust: Certified MCS installers, fully compliant with BUS and ECO4 schemes
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