Model 440x Commercial Duct Tester

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.

1 x 400 Series Fan Set

• 400 Series Calibrated Fan
• 4″ Plug – Range 74
• 4″ Plug – Range 47
• 4″ Plug – Range 29
• 4″ Plug – Range 18
• 4″ Plug – Range 11
• Power Cord
• End Plate 400 – Range 102
• DucTester Tubing Kit
• Tubing Umbilical
• System Calibration Verification Report

1 x DucTester Accessory Kit

• Large Deluxe Tool Case
• 10″ to 2.5″ reducer
• 4″ Flex Duct, 12′ 6″ long with 2.5″ Collar
• 4″ (100 mm.) Duct Connection Flange
• 8″ x 8″ (200 x 200 mm.) Duct Connecting Plate

1 x DM32X (30A) Gauge Package

• DM32X Gauge (30A Version)
• Gauge Case
• USB-C Charging Cable
• Cat5 Cable
• ISO17025 calibration of DM32X
• Gauge Calibration Verification Report

1 x Roll of 4″ x 180 Feet 9mil White Heavy Duty Tape

• Manual DucTester Operation Model 400x2.9 MB
• QuickGuide DucTester 440x 450x With DM32X11.2 MB