In large commercial buildings ductwork allows for the distribution of heated air and the extraction and replacement of unhealthy stale air. Insulation is an essential part of a ducted air-conditioning system. Large surface areas create significant heat losses/gains and this energy loss can be minimised using insulation which also has the effect of preventing the formation of condensation.
Alongside heated or cooled air, ductwork also carries noise and contaminants associated with “Sick Building Syndrome” that is thought to cause or aggravate illness, fatigue and a wider loss of productivity. Insulation can be associated with dust, fibres and mould growth and so selection is vitally important.
Flexible closed cell insulations are dust and fibre free and as moisture resistant foams naturally restrict mould growth. In addition flexible closed cell foams have excellent acoustic properties and can be used as combined thermal and acoustic insulation.
The following attributes should be considered when selecting insulation for use on ductwork: