Putting ductwork to the test

2 January 2017  |  Admin


The importance of ductwork testing

Malcolm Moss, managing director of Doby Verrolec and president of ADCAS (Association of Ductwork Contractors and Allied Services) says in the October 2016 edition of ACR News, that testing of ductwork not only helps compliance with Part L of the Building Regulations, but also offers peace of mind for the performance of the building. The installation of good quality, well installed ductwork can make a significant difference to the Target Emission Rate or TER.

With part L2A of the Buildings Regulations relating to leakage testing, conformity to the BESA guide DW/143 or DW/144 is essential depending on fan flow rates. There isn’t a testing requirement with DW/143 for low-pressure (class A) ductwork. A minimum 10% of low-pressure ductwork is tested at random to achieve the low pressure standard as stated in DW/143. With BER (Building Emission Rate) the improvements are further recognised by the National Calculation Methodology.

Of course, the added costs for testing under Part L could be an issue, but if factored in at the project stage, the costs can be absorbed and not passed on to the contractor to have to fund. Benefits of meeting and possibly exceeding the target rate means fewer cold or hot spots and a noticeable impact on the final buildings performance and reduction in the overall running costs.