Good indoor air quality

Better Breathing

We spend around 92% of our lives indoors where the levels of pollutants can be up to 5 times higher than they are outdoors, so effective filtration of incoming air is essential

Moisture Control

Lossnay recovers both latent heat (humidity/moisture) and sensible heat (temperature) to offer more efficient heat transfer

Fewer Allergens

Modern ventilation systems will filter out dust and allergens to deliver comfortable fresh air   

Lower Energy Costs

Lossnay can transfer up to 80% of heat energy from the outgoing stale air into the fresh air supply minimising the energy needed to bring the fresh air up to room temperature

Improved Wellbeing

Continually refreshing the internal air makes it easier to concentrate in office environments and helps improve wellbeing

Why choose Mitsubishi Electric?

Poor indoor air quality can be attributed to many problems in a building such as dampness, rot and mould. Pollutants are also known to be a major cause of damaging health issues such as asthma and eczema. Stale air is also believed to lead to a loss in productivity and low morale. 

According to the Building Research Establishment (BRE), exposure to air pollutants depends a lot on our exposure to indoor air and when we spend an estimated 90 per cent of our time inside buildings, we need to ensure these environments are fresh and comfortable.

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The demand for clean indoor air and improved energy efficiency in increasingly airtight buildings has caused a surge in demand for mechanical ventilation.

With tougher building regulations and legislation, along with concern over the spread of serious virus', a ventilation system that is both effective at bringing in fresh air and also highly energy efficient is now top of the requirements for architects, installers and occupants.

Download our ventilation brochure Find a ventilation installer

Introducing the new residential Lossnay

The residential Lossnay range of Mechanical Ventilation with Heat Recovery (MVHR) units create an environment of constant clean and healthy air at home.

Designed to be as quiet as possible these systems are designed to continuously extract from bathrooms, kitchens, toilets, and utility rooms where air can become polluted with high humidity, fumes, and chemicals on a regular basis.

Key benefits include:

  • Ultra quiet noise levels
  • Optional particulate matter filer, including NOx filtration
  • Full summer bypass function and cloud control
  • Digital controller included for ease of commissioning and use

Find out more
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Watch our latest webinar

Join Mitsubishi Electric’s webinar to explore how mechanical ventilation can improve indoor air quality in our day to day lives and the reasons why it should be at the forefront of everyone’s mind.

Watch here
Ask ME about indoor air quality webinar

Breathe easier with Lossnay ventilation



The technology behind the energy efficiency of the Lossnay range lies in the construction of the paper core, which enables exchange of both latent heat (humidity/moisture) and sensible heat (temperature).

The Lossnay core is capable of transferring up to 80% of heat energy from the outgoing stale air into the fresh air supply, to minimise the energy needed to bring the fresh air up to room temperature. This unique core is utilised within both Mechanical Ventilation with Heat Recovery systems and Air Handing Units.


By ultilising recoverable energy, Lossnay is able to save upto 30% on the capital outlay by reducing the heating and cooling loads within an occupied commercial space. In domestic spaces Lossnay units can be wall mounted or installed in ceiling spaces enabling a fresh, clean and healthy internal environment to be maintained whilst reducing heating and cooling costs.

Key Lossnay and ventilation products

Climaveneta Wizard

Air Handing Units

Ideal for buildings such as schools, offices, commercial properties and hospitality, our air handling units highly advanced, flexible and efficient.

Wall mounted ventilation product

Commercial Ventilation

Our commercial Lossnay systems can be utilised virtually anywhere to extract stale air and then recover the heating or cooling energy to either warm or cool incoming fresh air.​

Resi Lossnay VL CZPVU RL E

Domestic Ventilation

Our domestic ventilation systems are ideal for modern homes with high insulation afforded by double glazing and cavity insulation, which require ventilation to remove stale air without major heat loss.

Read more on The Hub

592 MBS air quality GettyImages 823352846

Why isn't air quality equal with water quality?

Karen Fletcher looks at the importance of indoor air quality and asks why, when we have stringent standards on water quality, the same doesn’t apply to the air inside our buildings?

595 Chris Jones 158449019

Improving indoor air quality

We spend around 92% of our lives indoors so, when we talk about air quality, we are more concerned with the air inside our buildings where the levels of pollutants can be 2 to 5 times higher indoors than they are outdoors.

650 Paddy Mooney 184616935

Don’t forget to let your home breathe

With the government offering up to £5k to upgrade efficiency in homes, Patrick Mooney looks at the importance of ventilation.