Are there ongoing running costs for a heat recovery ventilation system?

Question

We're having an MVHR system fitted in a new build extension. Beyond electricity... are there other regular costs we should factor in for maintenance and filter changes?

Martin · Answer

Yes, an MVHR (Mechanical Ventilation with Heat Recovery) system does have some ongoing running costs, although they are generally quite low compared with the benefits it provides.

The main costs to consider are:

- Electricity usage: The fans run continuously, but modern energy-efficient systems are designed to use relatively little electricity. The exact cost depends on the size and efficiency of the unit and how it is operated.
- Filter replacements: Filters usually need changing every 6–12 months depending on the property, local air quality, and manufacturer recommendations. Replacement filters are commonly around £20–£100+ depending on the system.
- Annual maintenance checks: While not always essential, a periodic service is recommended to check airflow rates, clean components and ensure the system is operating efficiently.

It is also important that the ductwork and filters are kept clean, as a poorly maintained system can become less efficient and may not provide the ventilation benefits it was designed for.

When correctly installed and maintained, an MVHR system can help reduce condensation, improve indoor air quality and recover heat that would otherwise be lost through traditional ventilation.

Ergis · Answer

Yes — besides the electricity usage, there are a few ongoing maintenance costs to consider with an MVHR system, but they’re generally quite manageable and well worth it for the improved air quality and energy efficiency.

Typical ongoing costs include:

Filter replacements – Usually every 6–12 months depending on the environment and manufacturer. Standard filters are often around £20–£80 per set.
Annual servicing – Recommended to keep the system balanced and running efficiently. A professional service can range from roughly £100–£250.
Duct cleaning – Not needed frequently, but some systems may benefit from inspection/cleaning every few years, especially if dust builds up.
Occasional part replacement – Fans or sensors can eventually wear out, although quality systems are designed to last many years.

In general, MVHR systems are relatively low-maintenance if filters are changed regularly. Keeping up with servicing also helps maintain airflow efficiency and prevents higher running costs over time.

Calum · Answer

Filters £20-£50 yearly service anywhere up from £100

Luke · Answer

Depending on how often you have your windows open at certain times of year will make the system need to work harder or less so which in turn will affect the running cost so bare that in mind.

Are there ongoing running costs for a heat recovery ventilation system?

Follow Us

Cookies

Manage Cookies

Essential cookies

Analytics & Tracking

Advertising