Are MVHR Systems Worth It?

Are MVHR Systems Worth It

Are MVHR Systems Worth It?

An MVHR system, commonly referred to as a heat recovery system, boasts features that can greatly aid anybody who is looking for ways to retain heat in their home whilst not compromising ventilation.

With that being said, are MVHR systems worth it? We will explore that question and more within this blog.

With new buildings being made to be as energy efficient as possible, and the UK aiming for 95% of its electricity usage to be low carbon by 2030 it is imperative to understand how we can make the most of our ventilation, This is where MVHR units come in.

To prevent mould, fresh air should constantly be introduced into your dwelling daily, as it helps to regulate temperature and reduce condensation. Introducing fresh air can be as simple as having a ventilation routine, or installing extractors or MVHR units. Almost all of this is facilitated by ducting.

I-Sells is here to provide the answers you need whilst also supplying you with all the information you need to combat mould and have a well-ventilated home.

What is MVHR?


MVHR stands for ‘Mechanical Ventilation with Heat Recovery’. This is essentially the technical term for the heat recovery units that we supply. They are often known as heat recovery systems.

Heat recovery systems can come in single or multi-room applications and provide all the benefits of ventilation with the added benefit of retaining the heat that would otherwise be lost in a regular ventilation unit.

Advantages of MVHR

The advantage of MVHR is retaining warmth without the humidity. Retaining warmth contributes to saving money that would otherwise have been spent heating your home.

The aim of a heat recovery system, aside from recovering any heat that is lost through ventilation, is to create an environment in which condensation, and consequently mould can’t survive. 

The advantages of heat recovery systems are the following:

How does a MVHR system function?

MVHR systems are generally located in the attic, of your home. It works by extracting the humid air in your home (mainly in your kitchen or wet room/bathroom) the warmth from this humid air is extracted and mixed with the air that is extracted from outside, and subsequently redistributed. 

In a nutshell, here’s what you get from MVHR systems

  • Extraction of humid air
  • Humid air is replaced with fresh air from outside but is also mixed with the warmth of the humid air that was extracted (without the moisture.)

Are MVHR systems worth it?

Yes, MVHR systems are absolutely worth it. With the cost of living increasing, not to mention gas bills, having as many solutions to make your home retain heat, whilst not compromising ventilation is key. MVHR systems balance these delicate matters, saving you money in the long term, which is never a bad thing!

With MVHR systems you are guaranteed to have…

  • Fresh, clean air that has exactly the amount of heat your home needs.
  • An efficient preventative measure against humidity.
  • An option to remove the heat recovery feature during warmer periods.
  • A quiet, yet energy-efficient system.
  • Multi and single-room systems depending on your needs.

Disadvantages to MVHR systems

In our opinion, the only disadvantage to an MVHR system is that it may take up space, but this is purely subject to the model you choose. That being said, units that are based in lofts and attics have a variety of installation methods that can give you space you can use.

Is an extractor fan better than an MVHR unit?

No, in terms of functionality, an MVHR is much better than a regular extractor, the heat recovering nature of an MVHR unit gives it an edge in providing comfort to its user, as well as efficiency that saves its user money in the long term. All of this, whilst also providing the function of a regular extractor fan.

Is MHVR the same as air conditioning?

Not exactly, although some units may require outdoor air to work, most air conditioning systems without ventilation intake and distribute air that is already in the room, just at a different temperature depending on your needs.

This can provide some comfort for the user, but without adequate ventilation, breathing in air that has only been altered in temperature, and isn’t fresh, can begin to irritate some people or affect their breathing if left exposed to conditioned air for too long.

Should my home be airtight for MVHR systems to work?

Not exactly, having a fully airtight house will result in no ventilation whatsoever, making humidity a regular occurrence. Every home has a leniency when it comes to being airtight. Though there is a form of air vent in every room of a home, your window.

The fact there is ventilation installed in your home means your home is not 100% airtight as it is. The main feature of an MVHR system is the recovery of heat that would be lost during ventilation, so to feel the effects of MVHR in action, closing your windows would be recommended.

Do I have to have an MVHR system?

Not at all. However, missing out on an MVHR system can result in you making extra effort to balance the necessities of proper ventilation and heat retention in your home. MVHR systems make this easier by addressing both issues at once.

If retaining heat is not an issue in your home and you require more ventilation, having extractor fans or a multi-room ventilation system could be the best option for you.

In contrast, if you find that your home loses heat too easily, you could benefit from exploring the following options.

  • Invest in double or triple-glazing windows. 
  • Consider the doors in your home, mainly the front and back, if they have a strong draft coming through them, you may need a more airtight door.
  • Drafts can come in and through your home, from a variety of spaces they were not intended to. Keeping an eye on them and sealing them properly can help retain heat.
  • Is your insulation due for replacement? Having extremely old or damaged insulation can greatly influence heat loss in your home. Especially in your attic/loft area. Heat rises, so insulation at the top of your home is vital.

I-Sells – MVHR units


We at I-Sells endeavour to ensure our customers have all the information they need before investing in our mould solutions. Be sure to visit our blog page to learn about the vast array of factors and issues surrounding ventilation, mould, condensation, and much more. 

We hope to have answered the question ‘Are MVHR systems worth it?’

We understand you may have more questions, Do not hesitate to contact us for more information about whatever you need our help with. If you’d like to send us an email, click here. For other contact options, see below:

Call us on 020 8463 9696

Visit us at our showroom:


Monday – Friday: 8:00 am to 5:30 pm
Saturday: 9:00 am to 12:00 pm
Sunday: Closed

15 St John’s Parade
Sidcup, Kent
DA14 6ES
United Kingdom

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