Can MVHR Heat a House?

Can MVHR heat a house? Heat Recovery Systems

Can MVHR Heat a House?

Heat recovery systems, also known as MVHR, are known to aid the redistribution of hotter air that has been extracted from your home. So we know that MVHR can help make your home warmer, but to what extent? Can MVHR heat a house?

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:

  • Holds all the benefits of an extractor, including the removal of stale air, humidity and smells.
  • It helps to prevent the cultivation of mould through the removal of humidity.
  • Temperature sensors ensure that additional heat is not being added to the atmosphere of the home if it is already hot. 
  • Heat recovery systems take a lot of the burden from you conducting a ventilation routine. This is ideal for a vulnerable person.
  • Less of a need to use your central heating frequently as the heat generated through your house is recycled through the heat recovery unit.
  • The reduced use of heating as a result of the heat conservation granted by a heat recovery unit can help you save on energy bills.

How does MVHR 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.)

Can MVHR heat a house?


Yes, MVHR can heat a house, but not to the same speed or degree that a central heating unit can. MVHR units recycle the warmth that is in humid air, effectively returning heat that otherwise would have been lost through extraction.

This means that your home will retain heat in a more economical fashion, resulting in a house that is comfortably warmer. MVHR units should not be the sole provider of heat in a home, it is a supplementary tool.

Will MVHR make my house hotter in summer?

Depending on the model you choose, the answer is no. Most MVHR systems have integrated systems that allow its heat-recovery function to effectively turn off during hotter months. This results in you still obtaining the benefits of having fresh ventilated air without the byproduct of extra heat.

Can I use MVHR to cool my house?

Not exactly, although the function to stop heat recovery will nominally help cool your home, it won’t be enough to be the sole provider of cooling in the home, so it should be supplemented with open windows.

What is the quickest way to heat my home?

Using your central heating system is the quickest way to heat your home. To ensure it works quickly and effectively, make sure your system is working properly and any necessary draining has been performed.

In addition, closing windows and doors can help conserve heat in their respective rooms whilst the heating is on. Mitigating any heat loss is the best way to ensure the rooms in your home stay warm once they have heated up.

Solutions to heat loss

MVHR systems of course provide one solution to heat loss, but without rectifying these issues, you may still be losing more heat than you think. Here are some solutions to reduce heat loss.

  • 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.

What happens if I have no MVHR or ventilation systems?

Having neither of these systems in your home can result in your home having humid stale air as standard. The humidity has a higher chance of becoming condensation, which left unattended can become mould. 

A humid environment is the ideal breeding ground for mould. Mould is known to aggravate health issues in people, whilst also smelling bad, being an eyesore and affecting air quality. 

To clarify, mould is also not always a result of not ventilating regularly, it can also be a result of water leaks that have been left untreated. These leaks can come from burst or leaking pipes, flooding, structural issues, and more.

How to remove mould

Although having ventilation systems in your home can greatly aid in preventing mould, it does not actually eliminate it if is already there. If there is already mould in your home, you can remove it through products such as a mould surface cleaner, amongst other solutions we offer.

There are also natural solutions to combat mould including using white wine vinegar. Its acidic properties can help to destroy mould. That being said, it won’t be effective against mould that is deep within grouting or has been growing for an extended period of time.

Mould-treating services are the best option to take for instances where mould is overrunning a property.

Purchase your MVHR unit today

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 ‘Can MVHR heat a house?’

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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