Commercial buildings which do not achieve Air Tightness often waste 20% to 40% of the total energy that they consume. When the building envelope is not tight energy is simply lost to the outside. Defective roof lights, smoke hatches and curtain walls, a result of poor design, defective construction, or incomplete maintenance is widespread. “We waste so much energy for no good reason” says SOLIDEA’s Steve Walker “Air Tightness is the big ticket cost in retail, commercial offices and hotels, and it has nothing to do with the level of Insulation installed”
What is Air-Tightness?
The level of Air Tightness in a building is measured as Air Permeability it is the measurement of the volume of air which leaks through the building envelope per hour per m² of building envelope at 50 Pascals Differential Pressure. Air Permeability is then expressed as a rate for example 3 m³/h. m² at 50 PA which is much better than 7 m³/h. m² at 50 PA. We can test Air Tightness on site and we can easily quantify the energy losses simply by measuring Air Permeability Continue reading