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Blower Doors
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Basics & Theory

Building Performance Podcast: Podcast On On Blower Doors
Building Performance Podcast features Colin Genge, founder and CEO of Retrotec, discussing the history of air leakage testing, how the tests really work, and what they don't actually test.

David R: Magnehelic Basics
David R's Blog describes some of the basics of the Magnehelic test instrument and some unique benefits it offers.

Home Energy: Introduction to Blower Doors
Home Energy magazine article explains how blower doors work, what can be gained from their use, and what a typical blower door test involves.

US DOE: Overview Of Blower Door Tests
US Department of Energy online video describes how professional energy auditors use blower door tests to help determine a home's airtightness.

You Tube: Manometer Mechanics For Home Performance Professionals
Online video describes the basics behind every dual channel digital manometer, and why the blower door test is wired the way it is.
Education & Training

BPI: Infiltration & Duct Leakage Certification
Building Performance Institute now offers the Infiltration and Duct Leakage (IDL) certification, a task-oriented credential that verifies a candidate can successfully conduct air infiltration and duct leakage tests to the ASTM E1554-07 standard.

Retrotec: Online Residential Pressure & Air Leakage Testing Manual
Retrotec online Residential Pressure & Air Leakage Testing Manual provides explanations of air leakage principles (from stack pressure to how door fans measure leakage); pressure gauge tests; preparing a building for testing (from selecting the right doorway to site requirements); air leakage testing (from the basics, to working with smoke, infrared cameras, and testing by specific standards); and other blower door tests (zone testing, unconditioned spaces, door leakage). (PDF)
Information Sources

Energy Conservatory: Presentations & Information On Blower Doors
Energy Conservatory offers access to their blower door videos, webinars, and articles.

Infiltec: Links To Information On Blower Doors
Infiltec provides links to information and resources on blower doors.

Retrotec: Online Videos For Retrotec Blower Doors
Retrotec online videos describes procedures for various blower door options, operations, and tests.
Issues & Performance

CAN/CGSB 149.10-M86: Standard For Determining Air Tightness Using Fan Depressurization Method
CAN/CGSB 149.10-M86 Determination of the Airtightness of Building Envelopes by Fan Depressurization Method standard is a method for determination of airtightness of building envelopes. It is not a method for determining the actual air leakage which occurs through a building envelope under the influence of wind and buoyancy pressures or the operation of heating and ventilation systems. The method is applicable to small detached buildings (especially houses) but with appropriate modifications, it can also be used for other buildings or parts of buildings. $64 USD

GBA: Accuracy Of Blower Door Test At Low Fan Speed
Green Building Advisor discusses whether a blower-door test is less accurate at low fan speeds/fan pressure, and if duct blasters are typically used to measure air infiltration for tighter buildings.

GBA: Blower Door Results Should Not Be Reported In Air Changes Per Hour
Green Building Advisor questions why we report blower door results in air changes per hour.

RESNET: 380-2016 Standard For Testing Air Tightness Of Buildings & HVAC Distribution Systems
RESNET and International Code Council have completed their RESNET/ICC 380-2016 Standard for Testing Air Tightness of Building Enclosures, Air Tightness of Heating and Cooling Air Distribution Systems and Air Flow of Mechanical Ventilation Systems. The national US standard provides a uniform methodology for evaluating the airtightness of building envelopes and heating and cooling air ducts and the air flows of mechanical ventilation systems. These test procedures can be used as building diagnostics, in quality assurance and control, for determining compliance with codes and standards and to determine input to energy simulations and ratings. (PDF)
Procedures

Chimney Balloon: Smoke Pencils For Finding Air Leakage Sites
Chimney Balloons blog has information on smoke pencil types, features, and use for searching out air leagage sites.

Ecohome: Metrics Of A Blower Door Test
Ecohome magazine describes the metrics of a blower door test for measuring a home's performance.

Energy Conservatory: Blower Door Applications Beyond Single Family
Energy Conservatory online Blower Door Applications Guide: Beyond Single Family Residential describes procedures and considerations for performing blower door tests on larger buildings. (PDF)

Energy Vanguard: Tips & Tricks For Blower Door & Duct Leakage Testing
Energy Vanguard provides seven tips for successful blower door and duct leakage testing.

GBA: Blower Door Testing Row Homes
Green Building Advisor describes how do you determine air tightness of a row home.

GBA: Blower Doors Have Become Essential
Green Building Advisor describes how blower doors can be used to measure a building's airtightness, to locate leaks, or to comply with a green-building program.

Home Energy: Blower Door Testing & Air Sealing Multifamily Buildings
Home Energy magazine describes how blower door testing and air sealing in multifamily buildings is not only possible, but important. The evidence is developing that, just as in single-family buildings, air sealing is the single most cost-effective measure in most apartment buildings.

JLC: Using Blower Doors To Test Energy Retrofits
Journal of Light Construction describes how to use the blower door to guide and verify home-performance airtightness and insulation retrofits on old, leaky, poorly insulated existing homes.

Karg: Getting Most From Blower Door
Rick Karg online presentation describes how to get the most from using a blower door. (PDF)

RDH: Air Leakage Testing of Multiunit Residential Buildings In Vancouver
RDH Building Engineering report summarizes air leakage testing that was performed for six suites within four multi-unit residential buildings in Vancouver, to quantify air leakage between adjacent suites, floors, common spaces, and through the exterior building enclosure. (PDF)

Retrotec: Controlling Air Leakage in Tall Buildings
Retrotec has developed a new testing protocol for the U.S. Army Corps of Engineers to meet their mandated 0.25cfm75/ft2 air tightness standard. This procedure is described in the report outlined Controlling Air Leakage in Tall Buildings. (PDF)

US DOE: Predicting Envelope Leakage in Attached Dwellings
US Department of Energy report Predicting Envelope Leakage in Attached Dwellings summarizes research to investigate an approach for developing a viable simplified algorithm that can be used by contractors to assess energy efficiency program qualification and/or compliance based upon solo blower door test results. (PDF)

Wx TV: Blower Door Prep & Setup
Wx TV online video guides you thorough the pre-test inspection, prep of the home, and setup of the blower door.

Wx TV: Blower Door Test Process
Wx TV online video demonstrates a blower door test from the moment you turn on the manometer. You'll also find out what the major infiltrations of a house are as they searche for air leakage.

You Tube: How To Use Blower Door To Test Homes
YouTube online video by Southface demonstrates correct blower door set-up and use in locating and quantifying the air leakage between the conditioned and unconditioned space in a home.
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