Optimise airflow performance with the testo 417 Kit 2, the complete measurement solution for air inlets, outlets, and swirl diffusers. Featuring a 100 mm vane for accurate readings, this kit includes two measuring funnels and a volume flow straightener to ensure consistent measurements—even in complex flow conditions.

With automatic calculations for volume flow and averaging, and full support from the testo Smart App, professionals can quickly adjust residential ventilation systems and document results in real time. The App handles configuration, storage, and display, transforming your smartphone into a powerful second screen.

Ideal for HVAC professionals, the testo 417 Kit 2 delivers reliable data, fast operation, and smart reporting—all in one portable package.