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Ducts are conduits or passages used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air. The needed airflows include, for example, supply air, return air, and exhaust air. Ducts commonly also deliver ventilation air as part of the supply air. As such, air ducts are one method of ensuring acceptable indoor air quality as well as thermal comfort.
A duct system is also called ductwork. Planning (laying out), sizing, optimizing, detailing, and finding the pressure losses through a duct system is called duct design.

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    Long cooker hood duct ?

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    Cable pulling question 25mm 4C in 63/50mm duct

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  5. J

    Cable distance from boiler flue internal duct?

    Hello there! Could anybody help me with this query please, I am not sure where to look up the information I need? As I understand it, cables must be at least 25mm from an actual boiler or gas pipe? But could anyone please point me in the direction of any information regarding any regulations...
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