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BSRIA Air Tightness Testing Floor Voids

When constructing a building with an underfloor H&V system it is critical to test the integrity of the floor void to ensure optimum operation of the system. BSRIA was recently sub-contracted by Airtight (UK) Ltd to carry out an air tightness test on a floor void and identify how much conditioned air is lost.

The building, a former aircraft hangar, has been refurbished to create a new call centre for Littlewoods, by Shepherd Construction Ltd and incorporates an underfloor air distribution system. The raised floor forms the plenum through which supply air at 15C is distributed. The air grilles located in the raised floor tiles modulate the quantity of supply air delivered into the occupied zone to satisfy the cooling load in the space.

Air leakage of the void would result in the loss of:

  • cooling capacity within the occupied zone
  • temperature control in the area adjacent to any leak

The permitted leakage rate is 0.5 l/sec/m2 when tested at 12.5 pa pressure differential. BSRIA has been selected for this job because of our extensive experience in testing floor voids, accuracy of our test equipment and our flexibility on site. With over 20 years experience and the UKs largest fleet of mobile rigs, BSRIA provides airtightness consultancy and testing for all types of commercial and domestic buildings, including specialist buildings, throughout the UK and Europe. Clients benefit from immediately available results, minimum site disruption and expert advice whilst on site.

BSRIA is UKAS accredited for building envelope testing and a founder member of ATTMA (Air Tightness Testing & Measurement Association).

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