Air filters introduce a significant pressure drop in the air stream and, therefore require significant amounts of energy to operate. Energy used in fans also increases the energy used in chillers since it is fully degraded to heat that must be cooled by the air conditioning system. In the last years, driven by indoor air quality (IAQ) criteria, the number of filters and its cleaning efficiency/pressure drop has greatly increased. Criteria for rational application of air filters must be developed in order to focus on changes and reduction in traditional requirements to adopt nZEB in 2020.
January 4, 2016