DS EN 13141-7:2010 Ventilation For Buildings - Performance Testing Of Components/Products For Residential Ventilation - Part 7: Performance Testing Of A Mechanical Supply And Exhaust Ventilation Units (Including Heat Recovery) For Mechanical Ventilation Systems Intended For Single Family Dwellings Defines the laboratory test methods and test requirements for the testing of aerodynamic, thermal and acoustic performance, and the electrical performance characteristic of a mechanical supply and exh