DS EN 13141-8:2006 Ventilation For Buildings - Performance Testing Of Components/Products For Residential Ventilation - Part 8: Performance Testing Of Un-Ducted Mechanical Supply And Exhaust Ventilation Units (Including Heat Recovery) For Mechanical Ventilation Systems Intended For A Single Room Defines the laboratory test methods and test requirements for the testing of aerodynamic, thermal and acoustic performance, and the electrical power of a un-ducted mechanical supply and exhaust ventil