Retrotec is the global leader in building diagnostic tools, including blower doors, duct testers, and instruments for measuring airtightness, pressure, and flow. Trusted by professionals worldwide, Retrotec is dedicated to innovation, enabling the construction of energy-efficient buildings.

Founded in Ottawa, Canada, Retrotec expanded to the US in 1984, offering tools and training for home performance professionals. Initially targeting for-profit contractors in high-performance housing, the company later grew its expertise in both for-profit and non-profit sectors.

Decades of collaboration with HVAC, window, and insulation contractors advanced diagnostic techniques and led to the creation of the Comfort Institute in 1999. Retrotec’s continuous re-engineering ensures competitive, professional-grade products.

Today, Retrotec employs over two dozen staff, exports to 50+ countries, and leads the market by a significant margin. In 2017, the company joined forces with Wöhler Technik to explore new markets, while retaining its brand, operations, and distribution network.