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Wrong – Air sealing and fastening of this duct take-off has been damaged during construction, causing a large gap in the right-hand side of the connection that will reduce air delivered to living spaces and make it difficult to balance the system

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Wrong – This duct boot is not sealed to the wall board

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Wrong – The plastic seal of the open end of this duct is ripped; the test measurement will overestimate the duct leakage if the temporary seals are not very carefully completed

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Air Leakage Testing Garage to House Air Barrier

Guide

Guide describing how to properly test the air barrier between the garage and house, and how to ensure the air barrier is tight enough to prevent garage air from entering the home.

Right – These duct take-offs are well sealed to the branch duct

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Wrong – This ductwork is not sealed where the round duct is attached to the square duct riser

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Right – This register is sealed for a final test and the duct test pressure is being monitored at the register

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This constant airflow regulator (CAR) has been fouled by deposition of aerosolized sealant because it was not protected during duct sealing

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Wrong – This duct boot is sealed inside the boot for a duct leakage test; this fails to account for the ductwork leakage between the duct boot and the wall board

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This constant airflow regulator (CAR) has been fouled by aerosolized sealant because it was not covered while the ducts were being sealed with the aerosolized acrylic sealant.

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ANSI/RESNET/ICC 380: Standard for Testing Airtightness of Building, Dwelling Unit, and Sleeping Unit Enclosures; Airtightness of Heating and Cooling Air Distribution Systems; and Airflow of Mechanical Ventilation Systems

Reference

This ANSI/RESNET/ICC standard provides a consistent, uniform methodology for evaluating the airtightness of building, dwelling unit, and sleeping unit enclosures and heating and cooling air distribution systems, and the air flows of mechanical ventilation systems.

Mechanical Ventilation for Attached Garage

Guide

Guide describing how to install an exhaust fan in an attached garage to pull fumes out of the garage and to depressurize the garage with reference to the home.

Duct Leakage Testing for Central Exhaust and Ventilation Systems in Multifamily Buildings

Guide

Guide describing the testing of duct leakage in central ventilation systems for multi-story, multi-family buildings.