How long does an MVHR unit last?

Typically around 15 to 20 years, and often longer with good maintenance. The fans and heat exchanger eventually wear, but regular filter changes and servicing extend the life considerably.

Does MVHR ducting need replacing?

Usually not. Well installed ducting is built to last the life of the building. It is the unit, mainly its fans and filters, that wears rather than the ductwork.

How do I make my MVHR last longer?

Change the filters on schedule, keep the terminals clean, and have the unit serviced every few years. Good duct design also helps, because a system that runs comfortably wears more slowly.

Is MVHR a good long-term investment?

In an airtight home where it is needed, yes. Over 15 to 20 years it provides constant filtered fresh air and heat recovery for a modest running cost, with the install cost spread over a long life.

How to Compare MVHR Units: Efficiency, Fan Power and Noise

How long does an MVHR system last?

A well maintained MVHR system typically lasts around 15 to 20 years or more, with the ducting lasting the life of the building. Like any system with fans and filters, it lasts longest when it is looked after. This guide covers lifespan and what affects it.

By VentRight Editorial · Last updated 2026-07-08 · Impartial · Sourced

How long does an MVHR system last?

A good quality MVHR unit typically lasts around 15 to 20 years, and often longer with good maintenance, while the ducting is usually built to last the life of the home. The fans and the heat exchanger are the parts that eventually wear, but regular filter changes and occasional servicing extend the life considerably.

As with most appliances, quality and care decide where in that range a system lands. A well made unit that is kept clean and has its filters changed on time can run well beyond 20 years, while a neglected one wears faster. The fixed ducting, by contrast, is usually a one-time installation for the life of the building.

What affects how long MVHR lasts?

Maintenance is the biggest factor. Changing filters on schedule stops the unit working harder and clogging, and keeps the heat exchanger clean. The quality of the unit and the ducting matters too, as does how well the system was designed and installed, since a system running hard against poor ducting wears faster than one that runs comfortably.

A system that has to fight high resistance from poor ducting runs its fans harder for the same airflow, which shortens their life and raises running cost. So good design pays off twice: lower running cost and longer life. After that, routine filter changes are the single most useful thing an owner can do.

What parts of an MVHR system wear out?

The fans and filters are the consumable parts. Filters are replaced routinely, every 6 to 12 months. The fans and control electronics are the main components that eventually fail after many years and can often be replaced without replacing the whole unit. The ducting and terminals generally last the life of the building if well installed.

This is reassuring for a homeowner: the parts that wear are mostly replaceable, so a failure years down the line often means a new fan or board rather than a whole new system. Keeping the model details and finding a unit whose spares are readily available helps here.

Is MVHR worth it over its lifespan?

Over 15 to 20 years, MVHR provides constant filtered fresh air and recovers heat that would otherwise be lost, for a modest running cost, which makes it good value in an airtight home. The install cost is the main outlay; spread over the system life, the ongoing cost is small. Good maintenance protects that investment.

The way to think about it is as a long-lived part of the home, like the heating or the windows, rather than a gadget. In an airtight home where it is genuinely needed, the comfort and air quality over two decades, for a small running cost, is what makes it worthwhile. See our cost and running cost guides for the numbers.

Questions

How long does an MVHR unit last?: Typically around 15 to 20 years, and often longer with good maintenance. The fans and heat exchanger eventually wear, but regular filter changes and servicing extend the life considerably.
Does MVHR ducting need replacing?: Usually not. Well installed ducting is built to last the life of the building. It is the unit, mainly its fans and filters, that wears rather than the ductwork.
How do I make my MVHR last longer?: Change the filters on schedule, keep the terminals clean, and have the unit serviced every few years. Good duct design also helps, because a system that runs comfortably wears more slowly.
Is MVHR a good long-term investment?: In an airtight home where it is needed, yes. Over 15 to 20 years it provides constant filtered fresh air and heat recovery for a modest running cost, with the install cost spread over a long life.