The First Truly Lightweight Handheld Commercial Duct Tester

The Model 440x DucTester is a complete game changer, delivering industry-leading performance in a compact, 21 lb handheld design. Capable of measuring duct leakage in commercial systems up to 295 CFM at 8 inches Water Column (in WC), this innovative tester offers unmatched portability and efficiency.

Featuring the newly released, industry-changing DM32X gauge, the Model 440x provides precise, real-time results displayed in any standard unit such as CFM/100 square feet. With 1700 Watts of power, it outperforms comparable commercial duct testers, which typically weigh 120 lb or more.

A first in the industry, this tester includes a touchscreen pressure gauge, enabling automated testing and the generation of SMACNA-compliant reports. Customize reports with your format, logos, and test images for seamless documentation.

Designed for single-person operation, the Model 440x eliminates the need for two technicians. Carry it over your shoulder, get instant results, and operate it wirelessly via WiFi while inspecting seals for leaks. The inclusion of ISO 17025 accredited calibration further solidifies its status as the most advanced commercial duct tester in 50 years.

Enhancements over the former Model 400 include a mounted gauge for easy accessibility and a newly designed foot base for enhanced stability during testing.

Who Uses the Model 440x?

Energy auditors, HVAC contractors, building contractors, remodelers, and home inspectors rely on the Model 440X for its cutting-edge technology, lightweight design, and industry-leading accuracy in commercial duct testing.