What are typical levels of savings in terms of energy usage?
For an industrial building with a floor area of 5000m², currently built without air tightness considerations, air permeability can be >14m³/(h.m²). This equates to a hole in the roof of approximately 5m²! If the air permeability can be reduced to 8m3/(h.m²), which comfortably passes Part L, then the energy saving could equal >60,000 kWh per annum. NOTE: Current best practice for industrial type buildings in regards of air tightness is an air permeability figure of 2m³/(h.m²).
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- What are typical levels of savings in terms of energy usage?
