The TEC Trainer from The Energy Conservatory makes it easy to teach and demonstrate Blower Door and Duct Blaster:registered: testing procedures right in the classroom. The TEC Trainer includes an easy to assemble testing enclosure with 3 adjustable leakage windows plus a duct system for a wide variety of testing scenarios. The TEC Trainers simple assembly and disassembly makes it extremely portable so that it can be quickly moved between training locations. The combination of testing enclosure, duct system and adjustable leakage windows gives you maximum flexibility in testing applications. The TEC Trainer can be used to demonstrate building pressurization and depressurization tests, total duct leakage tests and duct leakage to outside tests.