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Noxmaster Case Study

Case Study

Noxmaster Improves Indoor Air Quality for Main Road Residents

The Challenge

Air quality isn’t just an outside problem. People now spend 90% of their time indoors, 70% of which is in our homes and the air we breathe indoors can be up to 50 times more polluted than outdoor air. When living near main roads, highly reactive gases such as Nitrogen Oxides (NOX) and Particulate Matter (PM10 and PM2.5) enter the home through any natural leakage points, such as soffits and letterboxes. With long exposure to these pollutants, it affects those with heart and lung conditions which can shorten lives.

The Sheldrake family, living next to the A36 in Wilton – a busy trunk road, faced just such a problem; the need to improve the indoor environment whilst limiting the ingress of noise and pollution from the roadside. The family also wanted to reduce the indoor humidity level to 60% or less to eradicate any mould or condensation problems.

The Solution

Mr Sheldrake had investigated a number of alternative solutions, such as off-the-shelf carbon filters, however, dismissed this option as there are no proven trails and lack of information available. The Noxmaster was the only product that ticked all the boxes Mr Sheldrake required and was the only product on the market of this type. As an electrician, Mr Sheldrake was already familiar with the Nuaire brand who he describes as a reputable company within the industry; ‘When I saw that Nuaire were in the processes of developing a new technology that would help solve our problems, allowing fresh filtered air into the house without having to open windows to do it. I registered my interest and waited for its release.’

Noxmaster Single Image



Noxmaster is an award-winning, unique technology that combines a powerful carbon filter with Positive Input Ventilation (PIV). The Noxmaster’s filtration system removes up to 99.5% of Nitrogen Dioxide and up to 75% of harmful Particulate Matter (PM2.5). Noxmaster delivers clean filtered air into homes, improving the indoor air quality to within safe levels as recommended by the World Health Organisation (WHO).

This whole-home ventilation system significantly improves indoor air quality, and it allows occupants living near main roads to keep windows closed for security and to discourage pollutants from entering the home. The unit is also low maintenance and extremely energy efficient.

Noxmaster House

Noxmaster House

The Outcome

As an experienced electrician, Mr Sheldrake installed the system himself. The product is delivered with comprehensive instructions and a cutting guide for the diffuser; the unit itself comes in two parts to fit easily through most loft hatches. Following installation, the Sheldrake’s have seen significant improvements to the quality of their indoor air; ‘There has been a very noticeable air quality change for the better! I have a carbon dioxide meter in my bedroom which was always reading over 1500ppm which is quite a high reading.

However since I have had the Noxmaster installed, the highest reading is between 700-800 ppm which shows as a green safety light on the meter. It has reduced the humidity to around 55-60% usually it's 70-80%.’

Related Product

Noxmaster Single Image


Retrofit ventilation system, part of Q-AIRE range.