The ProAir 600LI has been tested by the Building Research Establishment (BRE) in the UK. This test is primarily an assessment of the energy efficiency of the unit, but is also rigorous in its treatment of other aspects of H.R.V. The heat exchanger efficiency and the motor efficiency (specific fan power – SFP) have been verified by these tests. The results are posted in their online database which acts as Appendix Q of the SAP and DEAP systems. This is listed on the Product Characteristics Database (PCDB).These tests have been done in accordance with the EN 13141-07 Standard which is rigorous in its treatment of other aspects of HRV as well as energy efficiency. See results listing here.The ProAir 300LI unit has also been testedIn April 2016 ProAir Systems received Passive House accreditation for its ProAir 600PLI.