The DM32 differential pressure gauge from Retrotec is used for blower door and duct testing operations. Retrotec offers the original DM32 and the DM32 with wifi.
This webinar video is an overview of the DM32 gauge from Retrotec. This webinar focuses on the following subjects:
- DM32 Overview
- Ports & Connections
- Updating the firmware
- DM32 Interface and operation
- Calculating results
- Common errors
- Running other manufacturer’s fans
- Running other devices & hole flow
For additional information on blower door testing, air duct testing, or related Retrotec products, call our sales team at 1 (855) 738-7683.
Ports & Connections
The video begins by detailing the physical layout of the DM32, including:
Pressure ports (A and B) for reference and test pressure connections
Fan and USB ports for connecting to blowers, computers, and external devices
WiFi toggle and power interface
The walk-through ensures users know exactly where and how to connect tubing and cables for common test setups.
Updating the Firmware
Keeping the DM32 up to date is essential. The video shows:
How to check your firmware version
How to download and install updates using a computer
Tips for avoiding connection errors during the update process
Interface and Operation
A tour of the touchscreen interface highlights its intuitive navigation, showing:
How to select test types (e.g., blower door, duct leakage)
How to switch modes or input building/test parameters
Accessing settings and system tools for customization
Calculating Results
Learn how the DM32 simplifies test results in real time. The gauge can display:
CFM, ACH50, EQLA, and more
Automatically calculated results based on test conditions
On-screen indicators for stability and range ring settings
This functionality removes the need for external calculations or software in most basic test scenarios.
Common Errors and Troubleshooting
The video covers frequent user mistakes such as:
Incorrect tubing connections (reversed input/output)
Pressure port confusion
Range ring mismatches
It explains how to identify and resolve these errors quickly in the field.
Compatibility with Other Manufacturer’s Fans
The DM32 isn’t limited to Retrotec equipment. The video demonstrates:
How to connect and control The Energy Conservatory (TEC) fans using adapter cables
Running fans or devices that use industry-standard control voltages
Adjusting flow settings for compatibility
Running Other Devices & Hole Flow
The DM32 can also be used to:
Measure hole flow or passive airflow (e.g., exhaust fans or leaks)
Set it up as a powered flow hood controller
Use in specialized scenarios like sealed room tests or infiltration diagnostics
