Over two years of development work and 4 injection molds later, the Model 300 has emerged as a unique and versatile testing system. More power but a lot less weight too and the ability to run for hours on batteries! The same fan makes an ideal duct tester. The Model 300 measures flows down to only 2/1000 of a CFM (1/1000 l/s), which is low enough to measure a light switch or the leakage of a single nail hole with optional low flow plates.
Super accuracy has been accomplished by the super tight tolerances of totally injection molded flow measurement parts and a unique flow pressure pickup guide fins that allow for super low but stable flow measurement. Nothing has ever been built with so much flow measurement innovation.
The Aluminum Frame has quick connect injection molded corners that decrease set up time with our snap together, snap apart frame while reducing leakage by 75%. Making this the perfect Passive House frame.
300 Model Fans DO NOT work with the DM-2 digital gauge.
At only 7.8 lb (3.5 kg) this fan can be easily carried or held in one hand.
Switch ranges in seconds with snap-in range plugs and a magnetically attached end plate.
Match the colored tubes to the ports even when pressurizing where you normally need to run an extra tube but not with Retrotec where the gauge figures it all out. You’re always hooked up correctly, nothing to remember; you cannot make a mistake.
High-capacity batteries last 8 hours. Recharge them anywhere - even in your car or from your laptop. Save hundreds of dollars a year over throwing away batteries!
DM32 smart gauge will display results in any units – no calculations needed!
Losing tools, disorganization, and protecting your electronics from corrosive smoke are no longer a problem with this custom case. Stiff lid acts as a gauge stand and the rubberized base protects from water and mud. Just open, grab what you need and get testing.
Custom molded connectors snap together then pop apart for instant disassembly.
Won’t crush and pops back into shape when dropped.
With large soft knobs and custom molded handles.Parts are numbered for easy learning and reduced set up time.
Graphics of ranges and fans are quickly recognizable, while the results are large and easy to see, eliminating error. Your settings all come back when you restart your gauge.
This fan’s custom wave shaping circuit transforms more power into flow resulting in less heat.
We built the world’s first automated backpressure compensated flow chamber to improve accuracy under all conditions.
This aluminum frame was designed to test the world’s tightest passive houses. Special square corners provide a full seal right into the corners of a doorframe.
Great software for controlling your gauge remotely from a computer or a smartphone, performing auto and semi-auto tests, updating gauge software, and more – all included.
Blower door testing software for automated fan operation, data collection, and report generation.
In compliance with standards: ASTM E-779-10, ATTMA TSL1 and TSL2, CGSB 149.10, EN 13829 variants, USACE
Software to configure parameters on the DM32 family of digital manometers, provided as part of the DM32 Software Suite. The DM32 Configurator software updates parameters on gauges including Network settings, and is used to update the onboard software on the gauge (firmware) when the manufacturer releases new features.
Software to record two channels of pressure readings to a spreadsheet file in real time, for use with the DM32 or DM-2 digital gauge.
Software to remotely control and reflect the state of a real gauge connected to a computer, or to generate a simulated gauge on the computer which mimics the operation of a DM32 family gauge.
Range 29 - Standard
Range 18 - Optional
Range 11 - Optional
Range 7 - Optional
13" × 11" × 13.25" (33 x 27.9 x 33.7 cm)
8.4 lb (3.8 kg)
Input: 120V/60Hz, 240V/50Hz, or 110V/50Hz Power cord supplied based on Country
Output: 48V DC/ 3.31A
0.213 hp, 159 Watts
Recommended Fan Calibration Interval:
Every 5 years
Digital Gauge Model:
Link to Specifications:
Click here to see the full specs for the DM32
Door Panel and
AL257 and AL250R
Type of Panel:
Regular Sized Cloth Panel for 200/300 Series Fan
29.5” - 45” (75 - 109 cm)
or 26.9" (68 cm) min for Model 200 Fans
53” - 97” (135 - 246 cm)
1.75” (5.3 cm)
16 lbs (7.3 kg)
* The max flow of the fan will vary depending on the following factors:
barometric pressure, back pressure, blade pitch, air temperature, bearing tightness, inlet air turbulence, length of flex duct