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Home > Retrotec Blower Door Systems
Retrotec US241 US 241 DU200 DucTester Air Duct Leakage Test System
Retrotec US241 DU200 DucTester Air Duct Leak Test System
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Retrotec US241 US 241 Blower Door Air Leakage Test System

The Retrotec US 241 features a calibrated Model 200 fan, Flex-Duct & the DM32 gauge.

Retrotec's US241 includes everything you require in order to measure air duct leakage.

Made for air duct testing
Retrotec's DucTester is specifically
designed to test ducts & tight enclosures and features over 3x the power needed to test even the leakiest duct systems to current standards.

Intuitive & Simple
The Retrotec DM32 Digital Differential Pressure Gauge comes standard with every DucTester system. This gauge may be used for numerous types of tests, with any other piece of equipment made.

When To Perform Testing
Testing air ducts after an attic is insulated may be easy, but fixing the problems is more difficult. Test HVAC ducts to identify, locate and fix
problems as your job progresses. Testing at rough-in is easier when you have better access as compared to waiting until after sheetrock is installed & the attic insulation is installed. Pinhole leaks are easy to locate with a smoke pen while your DucTester depressurizes the air ducts.

Everything you require
The DucTester system has all the tools you need to begin testing. An outside pocket is convenient for storing your smoke pencil, preventing destruction of the gauge and fan should your puffer leak.

Step by Step Guides
The Quick Color Guides help you begin testing in just a few minutes. Keep them with the DucTester so you can look up facts you might need during tests.

Color Coded Tubes
These make connections extremely easy & help you to eliminate mistakes. The special tapered connectors prevent leakage, while the umbilical consolidates all your tubes & cables into 1 neat bundle.

Test In Either Direction
The Model 200 calibrated fan blows into the Flex-Duct to pressurize air ducts. Simply attach your Flex-Duct to the opposite side of the fan which will depressurize ducts. No additional changes are needed since the fan is made for duct testing & works excellently in either direction.

The Retrotec US241 DucTester Can Test Air Duct Leakage

Retrotec US241 Features
  • Touchscreen DM32 gauge provides you with instant calculations for flow, (Air Changes / Hour) ACH & (equivalent leakage area)
  • Includes the recommended 5 year gauge interval for calibration
  • Gauge can extrapolate to exact target pressures - no need for averaging manually while testing
  • Large cloth door panel fits securely in doorways of many different sizes
  • Lightweight fan can pressurize a broad range of different enclosure volumes
  • Fan includes 3 different flow ranges which provide accurate test results for the broadest enclosure volume ranges
Package Includes
  • DM32 Digital Gauge Package which includes
    • AC Adapter
    • Ethernet and USB cables
    • Antiskid mat with case
  • Model 200 fan set
    • 3 range configurations
    • Average calibration
    • Power panel is country specific & appropriate voltage
    • 25 foot power cable
    • Fan shell 10 year warranty
    • 2 year component warranty
  • 2 - Shower cap front & back fan covers
  • 12.5 foot Flex-Duct w/ flanges to mount on a return register & Velcro for attachment to your fan
  • Model 200 fan umbilical, 7 ft. (2 meters) - includes color coded tubes for gauge - fan connection
  • Manufacturer certification training
  • Reporting software calculates duct leakage cost
  • FanTestic Lite software provides automatic control for air leakage tests as many standards require
  • DM32 Software Suite provides configuration, DM32 remote control & data logging
  • Tubing kit includes
  • 35 feet of yellow, red, blue and green blue tubes
    • Static probe
    • Metal probe
    • Connectors
  • 1 roll grill mask to seal registers
  • Quick guide system & gauge training cards
  • Deluxe cordura tool bag w/ shoulder strap

Retrotec DM32 Manometer Smart Gauge Features A User Friendly Touch Screen
Retrotec US 241 DucTester Includes The DM32 Differential Pressure Gauge Manometer WiFi Package

Retrotec US241 Specifications

Series 200 Fan

120V / 60Hz, 200 watts

Maximum Flow:

680 CFM (into free air)

620 CFM (into 50 Pa)

Maximum Flow (open range):200 CFM (@ 50 Pa**)
Maximum Flow (mid range):50 CFM (@ 50 Pa**)


11.75 lbs (5.3 kg)


13" × 11" × 13.25" (33.02 x 28 x 33.66 cm)

Maximum Current:


Motor & Fan Blade:

0.25 HP - w/ 8 blade fan

Minimum Flow:

7 CFM at 25 pascals

Flow Accuracy:


Calibration For Flow Accuracy compliance

CGSB-149.10, ASTM E779-10, USACE, EN 13829, UK ATTMA TSL2 and TSL1, EN15004, ISO 14520, NFPA 2001

Calibration interval recommended:

Every 5 years

Pressure accuracy
±1% of pressure reading or ±0.15 Pa (whichever is greater)
Measurement Units

Pressure - in WC, ps, Pa

Flow: CFM, L/s, cu m/s, cu m/h

Flow - Area (Permeability) CFM / squareuare ft., CFM / 100 squareuare foot, CFM/1000square ft, (cu m/h)/square m, (L/s)/square m

Air changes per hour: /h

Equivalent leakage area, “EqLA”: square ft, square in, square cm

Effective leakage area, “EfLA”: square ft, square in, square cm

*Results can be extrapolated to any desired test pressure

The following results are already extrapolated to the stated reference pressure:

Equivalent leakage area extrapolated to 10 Pa, “EqLA10”: square ft, square in, square cm

Equivalent leakage area per enclosure area at 10 Pa, “EqLA10/area”: square ft/square ft, square in/square ft, square in/100square ft, square cm/square m)

Effective leakage area extrapolated to 4 Pa, “EfLA4”: square ft, square in, square cm

Effective leakage area per enclosure area at 4 Pa, “EqLA4/area”: (square ft/square ft, square in/square ft, square in/100square ft, square cm/square m)

Choose Options and Quantity
Fan Parts FN280 - Speed Control Splitter - Includes DM205 Control Cable [+$165.00]
DM205 - 20 foot Control Cable [+$15.00]
DU154 - Mid Range Ring [+$30.00]
DU154 - Low Range Ring [+$30.00]
PT103 - Power Cord [+$20.00]
Aluminum Frames & Parts AL268 - Cam Lever and Expander Assembly - Left Unit - Single [+$25.00]
AL269 - Cam Lever and Expander Assembly - Right Unit - Single [+$25.00]
AL251 - Standard 42 Inch Aluminum Frame Door Cloth [+$125.00]
AL261 - Standard 50 Inch Aluminum Frame Door Cloth [+$160.00]
AL256 - Double 42 Inch Aluminum Frame Fan Cloth [+$180.00]
AL206 - Cloth Panel Fits 3000 High Powered Series Fan Regular Height [+$180.00]
AL267 - 200 Series Fan 50 Inch Aluminum Frame Cloth [+$185.00]
AL265 - Standard 50 Inch Aluminum Frame Double Fan Cloth [+$200.00]
AL266 - Standard 50 Inch Aluminum Frame Triple Fan Cloth [+$240.00]
AL270 - High Pressure Cloth Fits Large 50 Inch Aluminum Frame [+$240.00]
AL215 - Aluminum Frame Extender Kit - Fits Doorway to 105 inches tall & 48 inches wide - Includes Additional Crossbar Extender Pieces velcro safety strap & Large Cloth [+$250.00]
AL250 - Standard Frame 42 Inch Red Aluminum [+$375.00]
AL250R - Frame Package 42 Inch Red Aluminum [+$535.00]
AL260 - Large 50 Inch Aluminum Frame [+$585.00]
AL260R - Red Aluminum 50 Inch Frame Package [+$795.00]
Accessories DM346 - 7 Ft. Blue Cat5 Cable [+$10.00]
DM340 - USB Cable - 6 Ft. A to MicroB - 6 Ft. A to MicroB 5-pin Gold Plated 28 / 24 awg with Ferrite [+$13.00]
AC116 - Refill - Dragon Puffer Fluid 3 Pack [+$18.00]
TU119 - Tubing Accessory Kit [+$20.00]
GA110 - Static Pressure Probe [+$20.00]
GR106 - Grill Mask Dispenser [+$30.00]
GR113 - Grill Mask - 12 x 12 inches - 160 ft. - White Single Roll [+$50.00]
DM341 - Charging module for the DM32 (North America) [+$52.00]
AC110 - Smoke Pencil Dragon Puffer Kit [+$60.00]
PP101 - Small Pressure Pan 13 x 15 x 4.5 inches - Poles not included [+$60.00]
PP102 - Large Pressure Pan 24.5 x 24.5 x 8.75 inches - Poles not included [+$70.00]
DM240 - Umbilical for 200 Series Fan - 7 ft. [+$90.00]
GR109 - Grill Mask - 12 x 12 inches - 160 ft. - White 3 Rolls [+$150.00]
Flex Duct DU159 - 200 Series Verification / Calibration Plate - used for checking duct tester for calibration) [+$55.00]
DU161 - DucTester Mylar Flex Duct 12.5 feet (3.8 meters) [+$60.00]
DU157 - DucTester Flange [+$100.00]
Bags & Carrying Cases FN130 - Fan Shower Cap Cover (front or back) [+$9.75]
TL118 - Cordura Deluxe Toolbag w/ Shoulder Strap [+$120.00]
TL133 - System Accessory Case [+$120.00]
FN211 - Fan Case Hard Sided [+$195.00]
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