ASHRAE Standard 126-2016 Method of Testing HVAC Air Ducts
ASHRAE Standard 126-2016 Method of Testing HVAC Air Ducts is a joint project of ASHRAE and the Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA). It was created to provide methods of testing to determine the strength and durability characteristics of HVAC ducts under various loading and environmental conditions. The intent of Standard 126 is to address all duct shapes and materials. To the project committee’s knowledge, no other publication addresses all of the structural and durability tests as comprehensively as this standard, although individual tests are covered under other standards.
This standard does not address the following
a. Fittings
b. Effects of aerosols, solid particulates, corrosive environments,
or combustibility
c. Long-term effects of extended service
d. Seismic qualifications
e. Underground ducts
f. Plenums and equipment casings
You can also Read ASHRAE Standard 181-2018 Methods of Testing for Rating Liquid-to-Liquid Heat Exchangers
ASHRAE Standard 126-2016 Method of Testing HVAC Air Ducts
- Foreword
![ASHRAE Standard 126-2016 Method of Testing HVAC Air Ducts]()
- Purpose
- Scope
- Definitions and Symbols
- Instrumentation
- Tests
- Leakage Test
- Structural Tests
- Durability Tests
- Report
- References
- A Commentary
- B—Leakage Test Setups and Example Problem
- C—Recommended Acceptance Criteria
- D—Bibliography
A standardized set of comprehensive tests used to ensure that products meet minimum structural requirements, and to allow products compared to one another. Such tests should simulate structural stresses that the duct will experience in service and facilitate the application of safety
factors.
These tests include pressurizing the ductwork, applying superimposed loads, dropping weighted implements for impact or puncture, applying tension to the duct, bending flexible duct 180 degrees, subjecting the ductwork to temperature and humidity changes, and bursting or collapsing the ductwork under pressure. After an individual test or a series of tests, leakage tests may be conducted to determine the effect of a structural or durability test on a specimen. During a test or series of tests, the ductwork is observed to determine if there is degradation and permanent damage.
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