
Jannes Holding s.r.o.
Honzíkova 635/6, Praha, Dolní Měcholupy
Door fan test (DFT) is a test of the tightness of a room carried out according to EN 15004-1. Blowerdoor test is a measurement of the air permeability of the building envelope according to ČSN EN ISO 9972. We also offer technical consulting services in the field of construction and architecture.





