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Home > Retrotec Blower Door Systems
Retrotec US3112 US 3112 Blower Door Air Leakage Test System
Retrotec US3112 Blower Door System
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Retrotec US3112 US 3112 Blower Door Air Leakage Test System

The Retrotec US 3112 features a calibrated Model 3000 fan, a tight fitting large cloth door panel & the DM32 gauge.

The 2 horsepower upgraded 3350 speed control drives along with the eight blade fan outputs more than 8,500CFM making it perfect for larger residential home testing & many commercial buildings using a single fan.

Also included is a larger, easily installed door panel with an adjustable aluminum frame to accommodate enclosures with various sized doorways. Store your door panel in the rugged carry case (included) which also comes with an innovative custom designed cloth which can hold the fan in an aluminum frame while Velcro industrial strength straps securely hold your fans & numbered frame pieces make set ups quick & easy. Additional crossbars assist in keeping the frame securely inside the doorway especially under very high test pressure.

With the fan installed in your door panel, Retrotec's 3100 Series Blower Doors execute fully automatic tests with the gauge, laptop & the FanTestic software. You may also simply key your desired testing pressure into your gauge & read 'Air Changes' or 'leakage per unit area' directly in real time from your touchscreen gauge - a unique & highly valued Retrotec exclusive feature. The gauge has an onboard 'Set and Forget' control for building pressure. Simply choose the desired pressure and let your gauge take care of the rest. As leaks are sealed in your enclosure & leakage rates decrease your gauge will instantly and automatically adjust the fan speed so the enclosure will maintain the proper pressure.

Software included with your DM32 touchscreen provides data logging
automatically & control of the gauge remotely from your laptop. With the new recommended five year calibration interval for the DM32 you will avoid yearly calibrations.

Calibrated range configuration allows 1 fan to perform testing for wide variety of enclosures - from super tight to super leaky. The fan also includes 11 different flow ranges which provide precision results for the largest enclosure volume ranges. All of Retrotec's fans are manufactured with space age,
extremely durable plastic foam making them both tough and lightweight. They are easily reversible - to switch between pressurizing and depressurizing the enclosures, simply flip your fan around inside its panel.
The Retrotec US3112 Blower Door System Features A Model 3000 High Output Fan

Retrotec US3112 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
  • Fan with high output pressurize a broad range of different enclosure volumes
  • Fan includes 11 different flow ranges which provide accurate test results for the broadest enclosure volume ranges
Package Includes
  • DM32 Digital Gauge WiFi Package which includes
    • Android or Apple Apps
    • AC Adapter
    • Ethernet and USB cables
    • Antiskid mat with case
  • Rugged Cloth Door Panel to accommodate your 3000 fan which includes
    • Case
    • Safety strap
    • Holder for the DM32
  • Calibrated Model 3000 fan set w/ 11 range configurations & average calibration
  • 2 - Shower cap front & back fan covers
  • Umbilical for the 3350SR Fan - 20 feet (7 meters)
  • FanTestic Pro software provides automatic control for air leakage tests as many standards require
  • DM32 Software for datalogging, remote control & configuration
  • Level 1 and 2 Energy Training courses for air leakage testing in residential buildings
  • Tubing accessories kit
  • System accessories case
  • Hard side fan case
  • Printed color quick guides

Retrotec DM32 Manometer Has Innovative Features That Other Blower Door Systems Don't Have
The Retrotec US 3112 Blower Door System Can Perform Small Commercial And Residential Building Pressure Testing
 Retrotec US3112 Specifications
Previous model

Part Number:


Maximum Flow:

8500 CFM (into free air)

8300 CFM (into 50 Pa)

2300 CFM (into 300 Pa)

Minimum Flow:



120V, 60Hz, 15A

Maximum current:


Flow Accuracy:


Flow Accuracy
Calibration standards

CGSB-149.10, ASTM E779-10, USACE, UK ATTMA TSL2 and TSL1, EN 13829

Fan Calibration interval recommended:

Every 5 years

Gauge calibration interval recommended:

Every 5 years

PC Connectivity:

USB or Ethernet to DM32 gauge

Supported 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)

Pressure Range:

-1250 Pa to +1250 Pa (-5 to +5 in WC)


0.1 Pa (0.0004 in WC, 0.002psf)

Pressure Accuracy:

1% of pressure reading or 0.15 Pa (whichever is greater)

Gauge Calibration Meets:

Canadian CGSB-149.1-2002 & SuperE, USA ASTM E 779 - 03, European EN 13829 & CEN, UK TM-2.

Cloth Panel Dimensions

Door Width (max):


Door Height (max):


Frame Thickness:

1.75” (5.3 cm)

Choose Options and Quantity
Fan Parts FN280 - Speed Control Splitter - Includes DM205 Control Cable [+$165.00]
DM205 - 20 foot Control Cable [+$15.00]
FN313 - High Power Fan Drive - 120V / 60Hz [+$710.00]
FN216 - Range Ring A for 2000 / 3000 Series Fans [+$70.00]
FN217 - Range Ring B [+$40.00]
FN218 - Range Plate C8 [+$78.00]
FN219 - Ten Range Plugs for Plate C8 [+$12.00]
PT103 - Power Cord [+$20.00]
Training & Demonstration Rig TR180 - House Simulator for blower door system residential test training [+$1,000.00]
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]
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]
DM244 - Umbilical for 3000 / 4000 Series Fan - 20 ft. DM32 compatible [+$90.00]
GR109 - Grill Mask - 12 x 12 inches - 160 ft. - White 3 Rolls [+$150.00]
Bags & Carrying Cases FN130 - Fan Shower Cap Cover (front or back) [+$9.75]
AL262 - 50 Inch Aluminum Frame Roll Up Cloth Case [+$50.00]
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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