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Ventilation Tips: Ducting and insulation!
March 27, 2017

Ventilation Tips: Ducting and insulation!

Ducting for your ventilation unit in your home

Plan the arrangement of the ventilation ducting as simple and energy-efficient as possible.

  • In multi-storey buildings the ducts should be installed above a false ceiling or above the kitchen cupboards or should be built in as required.
  • In small houses, the ducts can also be installed in the attic.
  • The duct fixing points must be arranged so that the weight of the ducts is supported by other building elements.

The transmission of sound from the ducts to structural building elements must be prevented (place a piece of mineral wool between the roof truss and the duct and between the duct and the fastener).

Distribute the air

Distribute the supply air to bedrooms and other rooms where occupants spend the most time, taking into account the number of persons. Select the locations of the supply air diffusers to enable a thorough mixture of discharged air into the room air.

Intake of outdoor air

The intake of outdoor air to the ventilation unit should be arranged on the north side of the house, but not near the garage, a street with heavy traffic or any other source of fumes. Install an exterior wall grille in the exterior wall or below the roof eave.

Insulate ducting for aventilation unit in your home

Insulate the cold ducts (outdoor air, exhaust air) always with thermal insulation and line the insulation with a vapour barrier. Thermal insulate warm ducts in cold spaces (supply air, extract air, recirculating air) according to the insulation recommendations.

Warm ducts (supply air, extract air and recirculating air) should be installed in the warm side of the house’s insulation, so that the heat losses in the ducts will be as low as possible and the heat recovery efficiency will be high.

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