USB Driver for DG-500 & 700

Newer DG-700 and DG-500 gauges contain both a USB (located on the left in the picture) and a DB-9 Serial Communication Port (located in the center of the picture), either of which can be used to create a 2-way communication link between the gauge and a computer. This communication link can be used (along with TEC software) to conduct automated Blower Door tests and to data log both pressure channels.

-   Fully automated Blower Door testing requires a DG-700 gauge, TECTITE software, a Blower Door fan speed controller with a communication jack (standard equipment since September 2004), a fan control cable, and a communication cable (either USB or 9 pin serial) to connect the DG-700 to a user supplied laptop computer. (If using a TEC WiFi Link, no communication cable is necessary.)

-   Data logging of pressure measurements requires the TECLOG software, and a communication cable (either USB or 9 pin serial) to connect the DG-700 or DG-500 to a user supplied laptop computer.

In order for the Digital Gauge to communicate with your computer using a USB port, drivers must be installed.  You will know if the drivers have not been installed when you plug in the Digital Gauge into your computer, run TECTITE and you see a message that says that the Gauge is not communcating with TECTITE.  The driver file needs to be installed anytime you change computers.

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USB Port Installer for Digital Gauges

Blower Door Test Software

TECTITE 4.0 (WiFi) and TECTITE Express 4.0 (WiFi) are The Energy Conservatory's building airtightness test analysis programs for PC computers. The TECTITE programs make it easier than ever to conduct fully automated Blower Door tests, and to analyze and store Blower Door test data. The program's built-in report generator and graphing capabilities makes it simple for you document and present the results of a Blower Door test to a homeowner or client. Both programs are compatible with manual Blower Door testing (i.e. manual data entry), and fully automated tests using our DG-700 or APT system.

Common Features of TECTITE 4.0 (WiFi) and TECTITE Express 4.0 (WiFi)

  • Designed specifically for use with Minneapolis Blower Door systems.
  • Easy entry of all test settings and building information, and quick report generation.
  • Calculation and display of building airtightness test results including CFM50, air changes per hour, leakage areas, and building leakage curve.
  • Manual data entry mode allows you to easily enter manually collected test data.
  • Automated testing feature provides computerized control of Blower Door fan and automated flow and pressure measurements. Reduces operator error, eliminates time spent zeroing gauges, and ensures that tests are conducted the same way every time.
  • "Pause Feature" allows the automated test to be temporarily paused and then re-started at the pause point.
  • Semi-auto test option allows computerized data collection while manually controlling the Blower Door fan.
  • Measure, record and report up to 6 additional building zone pressures during the automated Blower Door test (can use multiple DG-700 gauges or an APT system).
  • "Deviations from Standard" reporting function.
  • Data point deletion option.
  • Real-time Air Change Per Hour at 50 Pa (ACH50) calculation during "Cruise Control". On-screen display is useful for quickly estimating building leakage rates before conducting a full test.
  • Program Help screens make program operation very user friendly.
  • WiFi connection for automated testing when the DG-700 Pressue and Flow Gauge (or DG-500) is used with the TEC WiFi Link.
  • Built-in PDF file report generator.

* Auto-Test Features require use of DG-700 or APT system and associated cabling.

TECTITE 4.0 (WiFi) Unique Features

  • Choice of 4 airtightness test standards: CGSB 149.10-M86 and the 3 RESNET test standards including One-Point, Multi-Point and Repeated Single-Point procedures.
  • Calculates estimated natural annual infiltration rate and the annual cost of air leakage.
  • Calculates need for mechanical ventilation based on estimated annual natural infiltration rates and ASHRAE 62.2-10 whole building ventilation guideline.
  • Estimated design infiltration rates can be used in Manual J load calculations.
  • Choice of report formats including a simple easy-to-read homeowner report, or a detailed technical report.
  • Compare feature generates test result comparison report for any two previously saved building files.

TECTITE Express 4.0 (WiFi) Unique Features

  • Choice of 3 airtightness test standards: ASTM E779-10, CGSB 149.10-M86 and EN 13829.
  • Can combine both pressurization and depressurization tests in the same test file.
  • Choice of English and Metric (SI) units.

DG-700 Digital Gauge Connection Options

This webinar hosted by TEC describes how to connect the DG-700 Gauge to a computer. Each connection option is discussed and some of the advantages and disadvantages of each. The TEC WiFi Link, a wireless network option, is also discussed.

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Unlimited Use TECTITE 4.0 (WiFi) Software

Unlimited Use TECTITE Express Demo

Mobile Apps (iOS and Android)


The free iTEC-700 App is a utility that provides wireless display and control of your DG-700 pressure gauge using your Apple or Android device and a TEC WiFi Link.  The iTEC-700 App has more calculations and building metrics all in the convenience of phone or tablet.  iTEC-700 also has flow calculations for the new Ring 4 for the Duct Blaster® fan.

The convenience of the iTEC-700 App allows you to remotely turn on, turn off or adjust a Minneapolis Blower Door fan or a Duct Blaster fan.  Useful when you are doing Blower Door guided air sealing.  Another application is to leave your Digital Pressure Gauge in the combustion appliance zone (CAZ) and then walk around the house turning on exhaust fans and determining the extent of depressurization that occurs to the vent and the CAZ while looking at your phone or tablet.

Click here to download the iOS iTEC-700 app from the Apple App Store.

Click here to download the Android iTEC-700 app from the Google Play Store.


The free iTEC RESNET App makes it easy to comply with the data collection and reporting requirements of the new RESNET One Point Airtightness Test, as specified in Chapter 8 of the RESNET Performance Testing Standards. iTEC RESNET allows the user to manually enter the required Blower Door airtightness data, calculate test results, record customer and building information, display test results and email an HTML report. In addition, project files can be geotagged, time stamped and a single photograph from the camera roll can be linked to the project file. Finally, the application can email a project test file that is compatible with our new TECTITE 4.0 (WiFi) Blower Door PC software.

To see more information, or to download the free App from the Apple App store click on iTEC RESNET App.

To see more information, or to download the free App from the Google Play store click  on iTEC RESNET Android.

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TECLOG3 - Data Logging Software (PC)

TEC’s premier software for data logging and conducting big building air leakage tests.

TECLOG3 is designed to monitor and store data from up to 16 DG-700's, DG-500's or APT's devices, and to provide computerized control of multiple Minneapolis Blower Door fans. Data connections can either be wired using CAT5 cable, or wireless using TEC WiFi Links along with a router.

TECLOG3 is the only software available that lets you see and track real-time building pressure and fan flow measurements, all possible because of our unique and easy-to-use graphical interface. During air leakage tests, TECLOG3’s electronic averaging of multiple building envelope pressures integrated with a Master Cruise Control makes computerized control of multiple blower doors a snap. Users can quickly select time periods to use in air tightness test results, and review and print test results using built-in calculation and reporting features, including a USACE compliant report. TECLOG3 makes it easy to configure data logging features including sampling rates, auto-zero intervals, pressure channel types and graph display options.

Click here for more information of using TECLOG3 to conduct multi-fan air leakage tests.

Click here for a PDF of TECLOG3 features.

An additional application for TECLOG3 can be found in User Tip #6. This User Tip contains an article describing how to use TECLOG3 and a DG-700 gauge to perform a worst-cast depressurization test. A sample TECLOG3 data file is also provided.

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Unlimited Use TECLOG3 Data Logging Software

Duct Airtightness Test Software (PC)

TECBLAST Ver. 1.2 helps you sell profitable duct testing and repair services by quickly analyzing duct airtightness test results. TECBLAST's user friendly entry screens and choice of professional looking reports makes it simple and fast to document and present test results to your customers. TECBLAST is designed specifically for use with the Minneapolis Duct Blaster system. For those with laptop computers, this useful program can be brought right to the jobsite.

TECBLAST Ver. 1.2 Features

  • Designed specifically for use with Minneapolis Duct Blaster systems.
  • Easy entry of all test settings and building information.
  • Calculation and display of duct airtightness test results including leakage rate in CFM, leakage area in square inches, leakage as a percent of system airflow, and estimated annual system efficiency loss from the measured duct leakage rate.
  • Choice of report formats including a simple easy-to-read homeowner report, or a detailed technical report.
  • TECBLAST lets you print your company logo directly on the reports. Uses either BMP or EMF files.
  • Program Help screens make TECBLAST extremely user friendly.
  • Compatible with all Windows computers.
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Unlimited Use TECBLAST Software

DG-700 Connect

The Energy Conservatory’s (TEC) DG-700 Connect software is a training and quality assurance (QA) tool that allows users to project a virtual image of one or more connected DG-700 digital pressure gauges on a computer monitor/projector screen. The functions and modes of the DG-700 gauge are operable by mouse clicks on the virtual gauge keypad, making it an ideal training aid for duct and envelope training programs. When used along with screen-sharing programs, DG-700 Connect can be used for both QA activities and to provide on-site technical support.

Download the user manual

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Unlimited Use DG-700 Connect Software

Blower Door Simulator

The TEC Blower Door Simulator is a software training aid that helps trainers demonstrate how to perform a blower door test without having to physically set up a blower door system. The Blower Door Simulator includes a virtual Model 3 Minneapolis Blower Door and DG-700 Pressure and Flow Gauge that can be used to perform a blower door test on a virtual house. Test conditions such as building airtightness, indoor/outdoor temperatures, building style and wind levels can be set to simulate a variety of testing scenarios. The program also includes a RESNET One-Point Test Calculator so that the user can see the effects of temperature and baseline pressure corrections on overall test results using the RESNET test procedure.

Download the Blower Door Simulator Manual

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Unlimited Use Blower Door Simulator Software

ZPD Calculation Utility (PC)

The Zone Pressure Diagnostics (ZPD) Calculation Utility provides a way to estimate the leakage from one zone to another.  It can help to prioritize air sealing activities.  The ZPD Calculation Utility uses Minneapolis Blower Door™ tests taken with the house closed with zone pressure taps to the garage, the attic or the crawlspace.  An opening is then made to the suspected zone, such as opening a door, and then running the Blower Door test again and noting changes in the zone pressures.

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ZPD Calculation Utility

ZPD Trainer Software (PC)

The ZPD Trainer Software is an interactive training tool that can be used to help demonstrate and teach the complex topic of Zone Pressure Diagnostics (ZPD). The ZPD Trainer screen contains 3 zones (house, garage and attic) that can be adjusted to demonstrate the relationship between air leakage and pressure. The software comes complete with charts and an Excel spreadsheet that can be used to teach ZPD concepts and calculate ZPD test results.

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ZPD Trainer Software

SeeStack Training Simulator

SeeStack is a training tool that allows the user to experiment with different variables of a house, number of floors, type of ventilation, different indoor and outdoor temperatures, and more to visualize stack effect.

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SeeStack Training Simulator