Heat Recovery


Trust Us With Mechanical & Ventilation Heat Recovery

We supply and install MVHR units (mechanical ventilation and heat recovery). When used in conjunction with a heat pump MVHR improves your SAP rating. Especially good when coupled with battery storage, solar panels and a heat pump. MVHR is a highly efficient and cost-effective way of ventilating modern buildings. It is a system that provides a controlled flow of fresh air while recovering heat from the outgoing air.

The Clivet heat recovery units also contain Hepafilters to catch pollen so that hayfever sufferers can have life easier. Cool air is brought into the property during periods when pollen levels are high, without fear of making symptoms worse.



What is MVHR?

MVHR systems work by using a heat exchanger to transfer heat between the outgoing stale air and incoming fresh air. MVHR systems are becoming increasingly popular in new build and retrofit projects. They are often used in energy-efficient homes, apartments, and commercial buildings. Usually where airtightness is essential to achieve high levels of thermal comfort and energy efficiency. So, carry on reading to explore the benefits of Heat Recovery systems, how they work, and the various applications of this technology.

Benefits of MVHR Systems

  1. Improved Indoor Air Quality (IAQ): MVHR systems remove stale and polluted air from buildings. They replace it with fresh, clean air, providing a constant flow of fresh air throughout the building.
  2. Energy Efficiency: MVHR systems can significantly reduce heating and cooling costs. This is by recovering heat from the outgoing air and using it to preheat incoming fresh air. This can reduce heating and cooling energy consumption by up to 50%.
  3. Comfort: MVHR systems provide a comfortable, draft-free indoor environment by distributing fresh air evenly throughout the building.
  4. Reduced Condensation: MVHR systems reduce the risk of condensation and mould by maintaining a balanced and controlled indoor environment.
  5. Noise Reduction: MVHR systems operate quietly and can reduce outdoor noise levels by providing a controlled ventilation system that eliminates the need for open windows.

    How MVHR Systems Work

    MVHR systems consist of three main components. The supply air unit, the extract air unit, and the ductwork that connects them. The supply air unit delivers fresh, filtered air to the building, while the extract air unit removes stale air from the building. The heat exchanger transfers heat between the incoming and outgoing air streams. Therefore ensuring that the building maintains a comfortable and constant indoor temperature.

    The extract air grille is typically located in the kitchen or bathroom, where moist air is generated. While the supply air grille is located in a central area of the building, such as a hallway or a living or sleeping room. The ductwork connects the two units, delivering fresh air to each room and extracting stale air from room that require extraction.

Applications of MVHR Systems

MVHR systems are suitable for a wide range of applications, including:

    1. Residential buildings: MVHR systems are ideal for modern, energy-efficient homes, providing fresh, clean air while reducing heating and cooling costs.
    2. Commercial buildings: MVHR systems can be used in office buildings, schools, hospitals, and other commercial buildings to provide a healthy and comfortable indoor environment.
    3. Retrofit projects: MVHR systems can be retrofitted into existing buildings, providing an effective ventilation solution without the need for extensive renovation work.
    4. Passive House buildings: MVHR systems are often used in Passive House buildings, which are designed to be highly energy-efficient and airtight.
    5. Low-energy buildings: MVHR systems can be used in low-energy buildings, such as those with airtight construction, to provide an energy-efficient ventilation solution.
Heat recovery box before fitting
MVHR installed in the roof of a newbuild house