What is Heat Recovery Ventilation (MVHR)?

Mechanical Ventilation with Heat Recovery or MVHR is a whole house ventilation system that both supplies and extracts air throughout the property.  It offers a balanced, low energy ventilation solution for new dwellings and recovers up to 95% of the heat that would have otherwise have been lost by opening a window or using a traditional extractor.

The modern home is now designed to be well insulated and more airtight than ever. This reduces the amount of heat loss from the home resulting in desirable lower energy usage and higher comfort. At the same time, these measures, by their very nature, restrict all means of passively ventilating your home through the building envelope to achieve a healthy indoor environment.

Stale air is extracted from bathrooms, toilets, and cooking areas, while fresh air introduced into living spaces. The energy from the warm, extracted air is recovered via a heat exchanger inside the heat recovery unit, which is then filtered and reused to temper the supply air for the habitable rooms such as living rooms and bedrooms. The heat recovery ventilation unit runs continuously at a trickle rate and can be further boosted when higher rates of ventilation are required e.g. bathing, cooking.

The Benefits of Heat Recovery Ventilation (MVHR)

  • Reduce Condensation

    Moist air trapped within a building which settles on cooler surfaces such as windows will form condensation. This is particularly relevant to airtight homes with a low degree of air ingress. Heat recovery ventilation systems remove moisture and provide a continuous flow of air which dramatically reduces condensation formation.

  • Eliminate Odours

    Stale air and odours are removed and replaced with fresh, filtered air without the need to open windows, which wastes energy.

  • Reduce Heat Losses

    It’s not logical to create a super insulated home and then puncture the insulation with trickle vents, extractor fans or by having to open windows. Heat recovery ventilation recovers the energy that would otherwise have been lost through traditional ventilation techniques.

  • Low Maintenance

    Very little maintenance is required for heat recovery ventilation systems, simply clean the filters every few months and replace them only as required.

Why Choose Us to Install your Heat Recovery Ventilation (MVHR)?

Healthy Environment

A continuous supply of fresh, filtered air reduces airborne pollution, perfect for allergy sufferers.

Complete Solution

We design, install and commission MVHR systems in Devon and Cornwall

Friendly & Helpful

Our initial consultation, advice, and itemised quotation is completely free of charge.

Premium Quality

We only provide the highest standards of workmanship and the best quality products.

Low Maintenance

Minimal maintenance required, just clean the filters every 3-6 months.

Things to Consider

Siting the Unit

Heat recovery ventilation units can be quite bulky and the complete systems can take up a surprising amount of space. It’s important to allow enough access room for initial installation, future servicing, and any maintenance requirements. You’ll also want to be able to easily clean or replace the filters as required.

Routing Duct Work

Ducting is required from the manifolds by the MVHR unit into every ventilated space. Generally, we always recommend a radial ducting system which can simplify this process, although careful planning is required to ensure that this is possible. In some cases, and particularly on retrofit installations, some ducting may need to be boxed in after installation is complete.

Air Tightness

The benefits of MVHR are increase with greater building air tightness, which makes it an excellent choice for modern well-insulated homes.Often trickle vents in windows are not required and there is usually no need for additional mechanical extractor fans in bathrooms or kitchens.

Your Budget

The typical costs to install a heat recovery ventilation system into a new build with a high-quality heat recovery ventilation system and the associated radial ducting system is £4000 – £8000+, depending on the layout and size of the property.