Groves added that the overuse of flexible ductwork was one of the malpractices he had often observed in the region: "Flexible ductwork has quite an impact on air flow efficiency, and I have seen some systems designed that are too long, and that change direction several times.
Meanwhile, negative ductwork industry trends that should be changed included the use of long, flexible ductwork; lack of testing; poor acoustic design; lack of appropriate vapour barriers; part-insulation of ductwork; and delayed repair of - or failure to repair - damages to galvanised iron ductwork systems.
Our tapes create the necessary airtight permanent seal required by municipal, state, and national building codes on flexible ductwork
, rigid duct board, and other applications."
L.P., a Houston-based supplier of flexible ductwork
for residential heating and air conditioning systems.
is often crimped by hangers or where it is snaked over girders.
It is based on an electric fan fitted into the loft then connected to flexible ductwork
which runs down into each of the rooms.
Each unit was connected to a storage tank by flexible ductwork
. When activated, the dehumidifiers drew outside air and sent it through a wheel of silica gel.
Then slide out the inner liner of the flexible ductwork
, gather three or four of the metal rings and use three more screws to attach the liner to the elbow.
Watkins Hire interpreted the site requirements, equipment required for the project included a 582kW Heatgen mobile packaged boiler plant fuelled by 35 sec fuel oil, 500kw Warm Air Handling Unit, 300 meters of 20 inch flexible ductwork
, a 2400 litre bunded fuel tank, Fuel supply and management, 50 meters of flow and return pipework, system pumps to match the flow, volume and resistance of the pipe distribution network and AHU.
that is improperly secured can loosen, causing conditioned air to flow into the ceiling plenum rather than occupied spaces.
In reaching this conclusion, the Board relied upon testimony that the contract's requirement for flexible ductwork and rigid steel connections prevented the ductwork from deflecting and flattening without incurring structural damage.
likely cause the flexible ductwork to flatten and break under the load of the backfill.