October 1 - October 2 Where: Retrotec Europe Headquarters. Hardermaat 12, 7244PZ Barchem, Netherlands Cost: €895 per person. Price break for 3 or more attendees (call for more info). Level 1 – Introduction to Airtightness Fundamentals Level 1 is targeted at witnessing authorities, testing and commissioning companies, and consultants. Learn about the behavior of air…

When: October 21-23, 2025 Where: Retrotec Headquarters. 1060 E Pole Rd, Everson WA 98225 Cost: $1950 per person. Pricebreak for 3 or more attendees (call for more info). Expand your skillset with Retrotec’s 3 Day Large Building Training! This intermediate course will provide an understanding of the role that air leakage plays in buildings. The…

November 25 - 26 Where: Retrotec Europe Headquarters. Hardermaat 12, 7244PZ Barchem, Netherlands Cost: €895 per person. Price break for 3 or more attendees (call for more info). Level 1 – Introduction to Airtightness Fundamentals Level 1 is targeted at witnessing authorities, testing and commissioning companies, and consultants. Learn about the behavior of air within…