Gauge Measurement Problems
Learn how environmental factors can affect your testing, and how to recognize them. Included are: the moving tube problem; the pinched tube problem; getting water in your tube; and, finally,…
DM32 Smart Gauge Overview
DM32 interface and operation– Running a Retrotec or MN fan– Using Virtual Gauge, GaugeRemote, and Data Logger– Calculating results https://youtu.be/oFZfX-D_gHA Running a Retrotec or MN Fan Physical Controls: The touchscreen…
Achieving code requirements is easy
Key Takeaways Set Clear Testing Targets Building air-tightness targets: ≤ 3 or 5 ACH50 depending on the code. Duct leakage limits: ≤ 8 CFM25 per 100 ft² for total, and ≤ 4 CFM25 per 100 ft² for duct…
Use the @Pressure Key to Get More Exact Results
Get Exact Results with the @ Pressure Key The @ Pressure feature allows the DM‑2 to extrapolate airflow (or leakage) results at a precise target pressure—even if the actual pressure hasn’t been…
Duct Leakage to Outdoors: The Hard Way Using Method 2 in Pressurization
Step-by-Step Procedure Complete Total Duct Leakage Test First Seal all registers and pressurize ducts to +25 Pa using the DucTester as usual. Set Up House Pressurization Ensure the blower door (or…
Setting Mode to Get the Results You Want on the Gauge
Step 1: Choose the Right Device & Range Press Device to select the gauge’s connected equipment (e.g., Retrotec DU200 or other DucTester). Press Range Config to match the actual range…
Duct Leakage to Outdoors: The Easy Way Using Method 1 in Depressurization
Step-by-Step Process Depressurize the Building Install a blower door in an exterior entrance and pull the house down to –25 Pa relative to outside. Connect the DucTester Attach the duct blower…
Total Duct Leakage on Simulated Duct
Simulated Setup Overview A compact duct system equipped with adjustable holes, representing common leaks found in real-world HVAC systems. All supply and return registers are sealed, except for the access…
Quick Guide Video Introduction
What You”l Learn A video-by-video layout showing the step-by-step progression through duct testing procedures. Directions on how the guide aligns with the printed Quick Guide manual, so you can follow…
Pressurize and Depressurize
Why Use Both Modes Depressurization tightens connections by pulling the duct panel seals inward—ideal for registering leaks effectively. Pressurization is more convenient in tight spaces and avoids blowing seals off…