When it comes to indoor air quality and energy efficiency, MVHR (Mechanical Ventilation with Heat Recovery) systems are a smart investment for any modern home. But like any high-performance system, MVHR units need regular maintenance to function optimally. Neglecting this can lead to poor air quality, expensive repairs, and reduced energy savings, all of which can cost you more in the long run.
In this blog, we’ll break down the hidden costs of poor MVHR maintenance and show you exactly how to avoid them.
1. Higher Energy Bills
An MVHR system that’s clogged with dust and debris has to work harder to push air through your home. Over time, this reduced efficiency translates to higher energy usage and inflated electricity bills.
Avoid it:
Regularly clean or replace your MVHR filters, we recommend every 6 months. You can buy replacement filters at our sister company The Air Shop.
2. Poor Indoor Air Quality
One of the key functions of your MVHR system is to deliver fresh, filtered air into your home while extracting stale air. But if the system is dirty or unbalanced, it may circulate dust, pollen, and other pollutants instead.
Risks include:
- Increased allergens and respiratory issues
- Damp, mould, and condensation buildup
- Reduced comfort levels
Avoid it:
Book an annual MVHR service with a certified engineer. Our technicians will clean internal components, check airflow rates, and rebalance the system. Book your MVHR service today.
3. Costly Repairs or System Failure
When neglected, small issues like clogged filters or faulty fans can snowball into major faults. Overheating motors, blocked heat exchangers, and damaged ducting are all common and expensive problems we see in poorly maintained units.
Repair costs can reach into the hundreds or require full system replacement.
Avoid it:
Keep a maintenance log and stick to the manufacturer’s recommended service intervals.
Do you need to replace your MVHR Unit? Send an enquiry here
4. Invalidated Warranty
Most MVHR manufacturers require proof of regular maintenance to honour their warranty. If your system breaks down and you can’t show it’s been serviced properly, you could be left footing the bill.
Avoid it:
Schedule a service with HRV Group and receive a digital service record for your system, ideal for warranty claims or resale value.
5. Inefficient Heat Recovery
Over time, dust buildup and poor calibration can drastically reduce your system’s ability to recover heat, meaning more heat is lost to the outside, and your home becomes less efficient.
Avoid it:
Make sure your system is properly commissioned and balanced by professionals. If you’ve just moved in or renovated, consider our MVHR commissioning service.
Key steps of MVHR Maintenance
While some issues require professional help, there are a few steps you can take to keep your MVHR system running smoothly.
Start by checking the filters, as these often become clogged with dirt and debris. Cleaning or replacing the filters every three to six months can ensure the system can move air in and out of your home.
Check all the air valves in each room are open for extracting or supplying air.
Call Professional Help is Necessary. If you’ve tried these steps and the system still isn’t working properly, and if you’re dealing with error codes, motor issues, or heat exchanger faults, it’s time to call a specialist.
Book a service- Annual servicing is recommended to keep dust, debris, grease and muck off of the main components; This includes inside the unit, motors, heat exchange and in room air valves. During a service, airflow rates will be measured, controls and condensate connections will be checked and you’ll get an idea if something isn’t working correctly. Read more about our servicing options.
For more information read our blog on Signs Your VHR System Needs Maintenance
Final Thoughts
Your MVHR system is a long-term investment in comfort, health, and energy efficiency. But without regular care, the hidden costs can creep in fast, from expensive repairs to lost savings and indoor air quality risks.
Avoid the stress, hassle, and cost by sticking to a proper MVHR maintenance plan. If you’re unsure where to start, the team at HRV Group is here to help.
Connect with us via our Contact Form
Other relevant blogs:
DIY MVHR Maintenance vs. Professional Servicing: When is it time to call the professionals
What to Expect During an MVHR Service Appointment
Frequently Asked Questions
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