The invisible threat: How poor indoor air quality affects our health and homes

People’s homes are their sanctuary. A place where comfort, health and wellbeing should come as standard. For housebuilders and developers, this creates a clear responsibility to deliver the homes of the future – ones that support occupant wellbeing, while also meeting high standards of build quality, regulatory compliance and long-term asset value.

Research from the UK government found that Brits spend around 80–90% of their time indoors. With that in mind, the quality of the air we breathe inside plays a vital role in the quality of our daily lives. It can impact everything from our productivity to our long-term health and that of our homes.

The hidden impact of indoor air pollution

It’s easy to assume that air pollution is only an outdoor problem, but a study conducted by the University of Birmingham discovered air pollutants inside UK homes can be more harmful than the air outdoors. This highlights an important consideration: indoor air quality is not just a health issue, but a build and specification challenge that directly affects occupant wellbeing and long-term building performance.

Poor indoor ventilation is closely linked to problems such as mould, damp, and the build-up of airborne contaminants. In a residential setting, these issues can lead to respiratory conditions, reduced comfort, and, ultimately, increased complaints from occupiers. Left unaddressed, they can also contribute to snagging issues, warranty claims, and reputational risk for developers.

At the same time, tightening standards around airtightness, driven by updates to UK Building Regulations and the Future Homes Standard, are reshaping how homes are designed and constructed. While improved airtightness supports energy efficiency and lower carbon emissions, it also reduces natural air infiltration. This places greater emphasis on compliance with Part F ventilation requirements to ensure adequate airflow is maintained throughout the home.

Without an effective, well-specified ventilation strategy, homeowners’ everyday activities such as cooking, cleaning and even breathing can increase humidity and pollutant levels indoors. Over time, this can allow mould spores, excess moisture and fine particulates to accumulate, affecting both occupant health and the fabric of the building itself.

Beyond health implications, poor indoor air quality can also lead to visible and structural issues, including condensation, peeling finishes and material degradation. For developers, this not only increases maintenance and remediation costs but can also impact the perceived quality and long-term value of the property.

The best solution is a breath of fresh air

Tackling indoor air quality issues often starts with one key solution: ventilation. For housebuilders and developers, this makes ventilation an important consideration at the design and specification stage, rather than something addressed later in the build. 

But not all ventilation solutions are created equal. 

Many buildings rely on extractor fans or simply opening a window to create ventilation indoors. Unfortunately, these systems can lower the indoor temperature by letting heat escape, increase energy bills and fail to provide consistent air quality, meaning they’re far from the complete solution.

Housebuilders and developers are instead encouraged to invest in smarter, more efficient air management solutions to provide occupants with proper protection. Mechanical ventilation with heat recovery (MVHR) systems provide a constant supply of fresh air while retaining heat for greater efficiency. 

The range of MVHR solutions from Wavin, works by drawing stale, humid air out of ‘wet’ rooms like kitchens and bathrooms whilst simultaneously supplying living spaces like bedrooms with filtered fresh air. For housebuilders, this provides a consistent, whole-house ventilation approach that can be designed into schemes from the outset. The system boosts energy efficiency through a heat exchanger, which captures heat from the stale, outgoing air and uses it to warm the fresh, incoming outdoor air, reducing the energy needed to heat the building to a comfortable temperature.

What makes this range a particularly powerful MVHR solution is how its intelligent control system responds to changing indoor conditions. It increases airflow when humidity rises indoors and reduces it when not needed – ensuring it delivers maximum comfort and energy efficiency for the end user.

These systems also help maintain healthy indoor air quality by offering a selection of filter grades that reduce dust, pollen, and road pollution entering the home from outside. The system’s ducting further acts as a barrier to harmful airborne spores thanks to its anti-bacterial and anti-fungal properties.

A practical route to keep homes compliant 

As the UK continues its work to cut energy bills and reduce reliance on carbon-intensive heating, new regulations and evolving buyer expectations are placing increasing pressure on housebuilders and developers to deliver solutions that perform on all fronts.

New homes are now expected to incorporate systems that not only keep running costs low but also support low-carbon targets and enhance overall quality of life for occupants.

MVHR provides a practical route to meet these demands, helping to support compliance with Part F and Part L, improve energy performance, and futureproof new developments against tightening regulations.

It offers an opportunity to meet multiple priorities in one solution – reducing energy waste, lowering long-term running costs, and adding tangible value to new homes.

For more information about Wavin’s MVHR solutions visit: https://wavin.com/gb

Ben Perris, Sales Director Indoor Climate Solutions at Wavin