What is MVHR? (Mechanical Ventilation with Heat Recovery)

MVHR explained:

Mechanical Ventilation with Heat Recovery (MVHR) is an increasingly popular method of ventilation within commercial, industrial and residential properties. Favoured for its more energy efficient capabilities, MVHR can be applied to a whole host of applications, helping to reduce the carbon footprint of the building’s ventilation system whilst maintaining thermal comfort and keeping energy costs down.

How does MVHR work:

Typically, a ventilation unit will remove stale air from a given environment, and replace it with fresh filtered air from outside. This fresh air may need to be heated in order to maintain a comfortable indoor temperature, requiring expensive heating energy to achieve this.

The benefit of an MVHR is its ability to offer stable and quality mechanical ventilation in areas with little natural ventilation, with the added benefit of heat recovery. An MVHR system is based on incoming fresh air, outgoing stale air, and the heat exchanger which is able to extract the heat from the stale air before it is exhausted. This heat, once extracted, is then transferred to the incoming fresh air, reducing the amount of energy required to heat the space.

The benefits of MVHR:

Offering steady and consistent ventilation, the MVHR unit will deliver fresh and filtered air into a space, reducing airborne pollutants and maximising the indoor air quality of a given space. An MVHR offers a low noise, low pollutant alternative to opening a window and as it is mechanically controlled, it is not reliant on personal preference. Some MVHR systems can heat and cool as well as ventilate and their heat recovery function means a substantial reduction in the amount of heating energy required, thus reducing the running cost of the system. The MVHR unit offers significant environmental benefits with such reduced energy use compared to traditional heating mechanisms and due to this and the use of low energy EC fans, Barkell’s own MVHR, Therm-X, conforms to the requirements for Part L of the UK Building Design Regulations and the European EcoDesign Directive – a very attractive proposition to investors, end users and consultants.

Recommended applications for MVHR use:

MVHR systems are the most efficient ventilation system available nowadays, and are ideal for small scale or large decentralized applications. Offering improved indoor air quality to small spaces, energy savings and a high level of controllability, they are popular in high occupancy areas such as universities, schools, offices, hotels, banks, leisure centres, retail outlets and other commercial environments.

Therm X – Barkell’s range of heat recovery units – is available in a variety of models to best suit the needs of the environment. With a ceiling void option, a free standing thermal wheel and a vertical and horizontal stacking plate heat exchanger solution, suitable for both indoor and outdoor installation, Therm X offers a heat recovery solution for most commercial building environments.

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