Underfloor air distribution ufad is an air distribution strategy for providing ventilation and space conditioning in buildings as part of the design of a hvac system.
Underfloor ventilation duct.
A single large overhead plenum to accommodate large supply ducts figure 1 can be replaced with a smaller ceiling plenum for air return combined with a lower height underfloor plenum for un ducted air flow and other building services figure 2.
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We manufacture distribute profi air semi rigid ducts and fittings from frankische.
Telescopic adjustable underfloor ventilator to provide ventilation beneath suspended ground floors equivalent area of 6000mm.
Further overhead ducts are installed in a ceiling plenum where 24 36 54 inch widths are not a big issue.
The amount of re circulation ductwork can be reduced by taking some of the return air at ceiling level directly back into the underfloor plenum without returning to the air handler.
My floor vents also goes dirty and for their air duct cleaning.
Ufad systems use an underfloor supply plenum located between the structural concrete slab and a raised floor system to supply conditioned air through floor diffusers directly into the occupied zone of the building.
So it becomes necessary to clean.
Ufad systems use the space beneath the raised access floor as a plenum to convey airflow to special floor mounted diffusers or systems.
Our selection of semi rigid ventilation ducts.
Because of being highly used the ventilation system starts to get choked with contaminants like fungi molds bacteria and dust.
However ductwork for ventilation air is still required and must be sized accordingly if the use of an outside air economizer will be an important operating strategy.
But these principals do not apply to ducting under the floor.
Hvac ductwork in floor slabs.
Overhead duct systems can create objectionable noise at duct velocities above 1500ft min.
This article describes heating and air conditioning ducts that have been placed in or beneath concrete floor slabs.
Ductsox underfloor systems are designed to distribute and disperse air to perimeter and high heat load locations in under floor air distribution ufad systems.
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Hvac air ducts located inside concrete slab floors invite a surprisingly broad range of building problems that fall into two broad categories.
Improved occupant satisfaction and productivity.
The vertical height of the ventilator unit adjusts to suit between 3 and 5 brick courses 225mm 375mm with a minimum cavity width of 50mm.
Ducts need to be 22 inches wide and 1 2 inches shorter than the space under the floor.
Always to be used in conjunction with the timloc airbrick 1201ab.
