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| Air Tightness Testing | Did You Know That? |
- At 370ppm, atmospheric CO2 concentrations are at their highest for at least 420,000 years.
- As recently as 1958 they were just 315ppm.
- CO2 concentrations have increased over 35% since 1750
- UN Scientists warn that if 400ppm is exceeded “the risks to human societies and eco-systems increase significantly”.
- It is calculated that to halt global warming, greenhouse gas emissions need to be cut to 60% below 1990 levels.
- 40% of the UK’s Carbon Emissions from human activity are related to the operation of buildings.
- A US study found that improving the air-tightness of an office building in Minneapolis would yield a 37% saving in energy usage.
- UK studies have found that improving the air-tightness of dwellings can yield energy savings of between 15% to 30%

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