At Exeter Heating, we understand that with more buildings being built and a need to meet current building regulations, new homes and commercial properties are becoming increasingly airtight. While this is excellent news for the thermal efficiency of a property as there aren’t any significant gaps around doors, windows, etc., it does pose another problem, ventilation. A property needs to “breathe”, it needs to have fresh air and have an efficient heating and ventilation system design, the reasons for this being:-

  • Controls condensation – by having air movement within the house it removes the moisture within the air. This moisture is created by cooking, showering, bathing, breathing and many other ways. If the property has no airflow, then this moisture condenses on colder surfaces, typically in the corners of rooms, on windows, or areas where it has been less well insulated. This condensation can lead to mould, which brings along with it its own health problems.
  • Removes stale, stagnant air from the property, the air that has been hanging around a while can lead to respiratory problems.
  • Removal of pollutants. These pollutants are generated by day to day living and without the means for them to disperse can lead to health issues. Leading causes for these pollutants are things like hair sprays, deodorants, cleaning products, even new carpets give off pollutants. There are many sources for potentially harmful contaminants.
  • Removal of unpleasant odours.

Above are just a few reasons that property needs to have regular air changes. However, with modern properties becoming more and more sealed for energy efficiency purposes air changes are not happening in the same way. Suppose the aim is to be a wholly sealed property, such as a Passivhaus. In that case, the property may be entirely sealed with virtually no air movement whatsoever.

Here at Exeter Heating, our team specialises in heating and ventilation system design and installation.

To overcome these problems faced by modern construction methods there are a number of solutions. These being:-

Mechanical Ventilation Heat Recovery

A system where warm and moist air is extracted from the bathrooms and kitchens is ducted through a heat exchanger. This then transfers the heat to the incoming fresh air, which is then ducted back out to your other living spaces within the property. Our heating and ventilation system design team at Exeter Heating can talk through your needs with you so that your property is fully ventilated at all times.

Mechanical Extract Ventilation

Mechanical Extract Ventilation, or MEV, provides continuous low level extraction from kitchens, bathrooms, shower rooms, utility rooms and toilets.

Positive Input Ventilation

This is most the straight forward type of heating and ventilation system installation that Exeter Heating can provide. It is a form of an installation with just a single unit located in a loft space,….


Whilst it is easiest to install a system as the property is being built, it doesn’t mean that it can not be fitted to an existing property. The key to a sound system is design and planning. Our team can talk you through your requirements, including new build properties (residential or commercial) where the ducting and siting of the MVHR unit can be included at the design stage. As the ducting can be 3-5 inches in diameter, the routes for the ducting need to be carefully considered. You can’t just drill a 5-inch hole in a joist as that will seriously affect the structural integrity of the joist! Ducting doesn’t need to be round, you can get letterbox shape ducting which in some cases, allows for great flexibility. With an existing property, MVHR can still be installed; it just may be a tad more challenging to incorporate it into the existing fabric of the building. Still, there is no reason why a well-sealed home can’t have the same benefits that MVHR offers.

The installation of MVHR goes beyond just putting ducting and the units in place and connecting them up. The system needs to be balanced to get the right amount of airflow at the extract and supply points in the individual rooms, to do this specialised equipment is used. Still, by setting up the system correctly, it means that you will be optimising performance whilst keeping the unit running as quietly as possible.

MVHR is a notifiable technology, similar to the installation of a new gas appliance or a rewire of a house. What this really means is that local building control needs to be notified of the installation. This can be done in one of 2 ways. A local building control officer can be asked to attend the installation address to assess that the installation has been carried out correctly. However, the most common way is to use a company such as ourselves that have proved competence and are qualified to self certify our own installation.

So if you’re looking for a reputable heating and ventilation system installation, you’re in the right place. Contact us today for more information about how our helpful, friendly and knowledgeable team at Exeter Heating can help you with your ventilation needs.