Free TRV Grant: The Installer’s Insider Guide to Maximising Your ECO4 Upgrade
Unlock expert tips on the Free TRV Grant under ECO4, straight from our installation team. Learn what most homeowners miss, avoid common pitfalls, and discover how to get TRVs fitted for free as part of your energy upgrade. Eligibility checks in 60 seconds.

Free TRV Grant: The Installer’s Insider Guide to Maximising Your ECO4 Upgrade
What Most Homeowners Don’t Realise About the Free TRV Grant
ECO4 grant eligibility requirements – When I walk into a home for an ECO4 survey, one of the most overlooked opportunities I see is the free TRV grant. Most people focus on boilers or insulation—but TRVs (thermostatic radiator valves) are a quiet powerhouse for comfort and savings. If you’re searching for this grant, you already know you want more control and efficiency—but the real secrets are in how and when to get them, and what mistakes to avoid. Here’s what I wish every homeowner knew before applying.
What is the Free TRV Grant Under ECO4?
The free TRV grant is part of the government’s ECO4 scheme—a program that funds energy efficiency upgrades for eligible UK households. While most publicity is around free boilers and insulation, the scheme also covers ancillary upgrades like TRVs. These are fitted to your radiators and let you control the temperature of each room independently, preventing wasted heat and potentially saving you £100+ per year in energy bills. But there’s more to it than just ticking a box on an application.
- TRVs are only free as part of a whole-house ECO4 upgrade—they’re not usually offered as a standalone measure.
- To qualify, your home and circumstances must meet ECO4 eligibility criteria—usually based on income, benefits received, and EPC rating (typically D or below).
- The grant covers supply and professional installation by accredited engineers—so you get both product and peace of mind.
Installer's Pro-Tip
Don’t just ask for TRVs! In my experience, you’ll almost always get a better upgrade package—including TRVs—if you go for a full boiler replacement or insulation under ECO4. The system is designed to maximise your home’s efficiency as a whole, so aim for a comprehensive assessment rather than cherry-picking single measures.
How the Free TRV Grant Process Really Works (Behind the Scenes)
- Eligibility Assessment
We start with a quick survey—checking your income, benefits, and EPC rating. Most homeowners are surprised to find they do qualify, especially with local authority flexibility (LA Flex) rules now in play. - Whole-Home Survey
Our installers inspect your current heating system, radiators, and insulation. This is where real expertise matters—missing a leaky radiator or poor pipework can mean your TRVs won’t perform as they should. - Proposal & Grant Application
We design a tailored upgrade plan. If TRVs will make a significant efficiency difference, we’ll specify them in the works. The application is then lodged with your energy supplier via the ECO4 framework. - Professional Installation
TRVs are fitted during your boiler or insulation upgrade, minimising disruption. We test each valve and show you how to use them—setting individual room temperatures and explaining how to balance your system for the best savings. - Aftercare & Support
It’s not ‘fit and forget’. Good installers (like our team at freeboilerupgrade.uk) will help you get the most from your new controls, and we’re always on hand for follow-up questions.
Common Mistake to Avoid
I’ve seen homeowners try to DIY TRV installation or use non-accredited installers to save time. This almost always voids your grant and can cause leaks, boiler issues, or failed inspections. Always use a registered ECO4 provider for both your application and installation.
Why TRVs Matter More Than Most People Think
Here’s what you don’t see on most government leaflets: poorly controlled radiators are one of the biggest hidden drains on your heating bill. I’ve been in homes where a single overheated bedroom was costing the owner hundreds per year. With TRVs, you can:
- Turn down spare rooms or bedrooms during the day—no more heating empty spaces.
- Fine-tune comfort in living areas versus bedrooms, avoiding ‘thermostat wars’ between family members.
- Reduce boiler cycling and wear, extending the lifespan of your system.
And under ECO4, these benefits come at zero cost if you qualify. As of 29/06/2025, funding is still available, but the scheme can change or end at any time.
FAQs: Free TRV Grant – Installer’s Answers
- Can I get TRVs without replacing my boiler?
Usually, no. The ECO4 scheme is designed for whole-house efficiency. TRVs are almost always included as part of a wider package—think new boiler plus controls, or insulation plus heating upgrades. - Do TRVs really make a difference?
Absolutely. In my experience, homes with properly installed TRVs see better temperature balance, less wasted heat, and lower bills—especially in older or poorly insulated properties. - How long does installation take?
Fitting TRVs typically takes 2-4 hours for a standard property, but it’s often done alongside other works. Good installers will ensure minimal disruption and leave your system balanced and leak-free. - What if my radiators are old?
We check every radiator during the survey. If replacements are needed for safety or compatibility, this is factored into your grant application—no nasty surprises. - Will my grant application affect my benefits?
No. ECO4 grants are not counted as income and won’t affect your entitlement to benefits.
Conclusion: Why Trust freeboilerupgrade.uk With Your Free TRV Grant?
In the world of energy upgrades, the free TRV grant is one of the most valuable—but least understood—opportunities. As seasoned installers, we’ve seen the difference first-hand: improved comfort, lower bills, and a smoother path through the ECO4 process. Our team at freeboilerupgrade.uk handles everything from eligibility to aftercare, ensuring you get the maximum benefit with minimum hassle. If you’re ready to take control of your heating and unlock your home’s full efficiency potential, start your application today—and let us do the heavy lifting.
