Mechanical Ventilation Heat Recovery: (MVHR)


Heat recovery continuous mechanical ventilation is a building ventilation system with dual flow and heat recovery that assures constant air exchange in the premises, limiting energy expenditure to the minimum. The ventilation and extraction units with highly efficient heat recovery assure a constant inflow of fresh air, while recovering up to 90% of the heat from the air extracted from the premises.


A heat recovery continuous mechanical ventilation system with dehumidification improves the quality of indoor air thus increasing environmental comfort and the well-being of the occupants, preventing moisture from building up and the onset of mould on the walls.

Most frequently Centralised heat recovery systems are employed. While these systems are efficient, they require a vast amount of ducting in order to supply air and this can incur large supply and labour costs

Single Room Ventilation Heat Recovery Units:

These are also known as Decentralised Heat Recovery Systems and are the ideal and practical solution to Retro Fit into existing buildings.

How it works:

These are single room, through the wall units. They provide a continuous air change, replacing stale, moisture laden air with filtered, fresh, heated air from outside. These units are easy to install.


Options for Single Room Systems:

Aspira Rhinocomfort RF


Single Room heat recovery unit with Air Sanitation

Aspira Ecocomfort RF


Single Room heat recovery unit with Wireless Control

The benefits of Single Room Heat Recovery

  • Fresh, filtered and clean air provided into the room.
  • Ideal for both retrofit and new builds.
  • Whole system does not go down in event of fault.
  • No ducting required, as opposed to central systems which require significant ducting and expense.
  • Condensation control & eradication of mould growth.
  • Extraction of odours and other air pollutants.
  • No need for open windows resulting in reduction of outdoor noise and lowering the security risk.
  • Quiet operation, no need for noisy extractor fans.
  • No need for trickle vents in the windows

General Facts about Indoor Air Quality

  • Indoor air can be up to 5 times more polluted than outdoor air.
  • Air can be exposed to a family of chemicals, VOC’s (Volatile Organic Compounds).
  • VOC’s consist of harmful substances in construction and cleaning materials, which are harmful to the human body.
  • Improper exhaust of indoor air means damaging chemical can remain present.
  • Lack of filtration on incoming air means more harmful substances can be brought into an already contaminated environment.
  • All contribute to sick building syndrome: Nausea, irritation, allergies, breathing problems.