Clean Indoor Air for health and sustainability

In a recent article published by REHVA, the Federation of European Heating, Ventilation and Air Conditioning Associations, Peter Dyment, the Building IAQ and HVAC energy consultant for Camfil discusses Clean Indoor Air for health and sustainability.


REHVA, are dedicated to the improvement of health, comfort and energy efficiency in all buildings and communities.

IAQ Peter discusses how there is an overriding need for people to breathe clean healthy air in both residential and commercial buildings today. Many buildings may be located in polluted industrial city locations or maybe in relatively clean rural settings.

There is an increasing trend for many people to work from remote locations or from their place of residence.

Many designers and engineers advocate use of ventilation methods that utilise naturally occurring air currents in buildings. Broadly these design solutions can be grouped under the name of passive ventilation. The great attraction of these types of solution is that they have low levels of energy use but the main drawback is that they are usually unsuitable for use in locations with high levels of air pollution.

These are air filter units that combine High efficiency particulate air (HEPA) filtration to remove PM2.5 and NO2 as well other commonly experienced pollutants. These air purifiers or air cleaners if they remove just particles are used in residential situations or healthcare applications. Removing aspergillus spores to protect vulnerable children and pollen removal to prevent asthma attacks are two recent needs that have been met.

Using a standalone air purification unit that delivers clean air at point of need if often a quicker more effective IAQ solution than trying to get a large unmanageable centralised HVAC system to service a small area in a large building with air. It can also save energy if the main HVAC system can be stepped down.

You can read the full article here. Continue reading

Misconceptions about air pollution – Air quality is better than it was

Founder & Director of Clean Air London, Simon Birkett recently wrote an article for Environmental Health News on the Misconceptions about air pollution.

The piece contains a series of cartoons which the campaign group Clean Air in London commissioned to address the capital’s environmental challenges. Beautifully crafted by Andy Davey (@DaveyCartoons), the cartoons address matters such as London smog, wood burning, the tube, cycling and taxis.

The first misconception mentioned within the article ’12 Misconceptions about air pollution’  is that ‘air quality is better than it was’.

Air quality is better than it wasThe Facts:
Visible coal smoke disappeared after the Clean Air Act and has been replaced by diesel exhaust and other largely invisible particles and gases. During this time, the certainty and scale of the health effects of air pollution have rocketed upwards while public understanding has remained where it was 30 years ago for smoking. To find out more, click here.

Continue reading

Clearly room for an air side view of London – The ‘Walkie Talkie’ Building

Article by Peter Dyment – Camfil UK


High up in the air above the bustling city at 20 Fenchurch street the curved shape of the ‘Walkie Talkie’ building has been noticeable on the skyline. It still has a few cranes atop the final stage as work finishes this year on the crowning summit of the building which will be the immense and surely spectacular enclosed roof garden with viewing gallery.

Walkie Talkie building

Works on the viewing gallery/garden level frame three close iconic buildings, Tower42, ‘The Cheesegrater’ and ‘The Gherkin’.

I was lucky enough to make a recent visit to inspect some plant on the site and there were numerous vantage points around the top floors to take in the spectacular views of London. These views were spread out in all directions. I watched Tower Bridge raise up for an old London barge. The bridge looked tiny laid out next to a toy fort called the Tower of London.

The outward curve of the ‘Walkie Talkie’ building is uniquely able to give an extremely large area at the top for the intended tiered roof garden. It differs from the angular pointed shapes of other recent London buildings. Continue reading