Achieving a good level of air tightness is vital for achieving optimum levels of energy efficiency – the more cracks and gaps – the draughtier the building, which will in turn lead to increased energy costs caused through this uncontrolled flow of air. To achieve the Passive House standard – one of the key aims will be to create an airtight building which will eliminate draughts, reduce energy consumption and lessen external noise levels.
Within a Passive House – the building has consistent interior surface temperatures and a stable indoor climate – thereby eliminating temperature fluctuations and draughts. However, ample fresh air is supplied at room temperature via high efficiency ventilation such as MVHR systems.