The latest version of ASHRAE 189.1 will expand duct testing requirements to include low pressure ducts as well as high pressure ducts.
The latest updates to ASHRAE 189.1 have been finalized and incorporated into the standard. They will be published after undergoing a final accuracy review before publication.
A key update to the standard is the broadening of duct leakage testing to include ducts operating at 3-inch WG (water gauge). Currently, the current requirement for leakage testing applies to ducts operation at ≥4-inch WG.
“The industry has resisted testing because of the additional cost involved,” said Bob Reid, former chairman of ASHRAE Technical Committee 5.2 and chief engineer at SPOT (Spiral Pipe of Texas). “But in reality, building owners can either make a relatively small payment upfront to ensure their ducts are operating properly, or they can continue to pay higher operating costs throughout the life of the building.”
There are new duct sealing methods that provide a demolition-free way to meet the tightened duct-sealing specifications. For instance, an aerosol-based duct-sealing technology seals leaks from inside the ductwork.
Related Stories
Codes and Standards | Mar 10, 2021
‘Smart retrofitting’ will be crucial to net zero aspirations
AI, analytical software, Internet of Things are keys to decarbonization of built environment.
Codes and Standards | Mar 9, 2021
Salt Lake City is first jurisdiction to adopt new standards for off-site construction
Code Council and Modular Building Institute developing standards and compliance protocols.
Codes and Standards | Mar 8, 2021
Hyperlocal zoning could spur more affordable housing construction
Letting blocks and streets pass their own rules could have impact.
Codes and Standards | Mar 5, 2021
Biden builds on Trump’s “Buy American” order
New administration extends preferences for domestic construction materials.
Codes and Standards | Mar 4, 2021
Biden administration overturns Trump’s federal building design mandate
Previous order promoted classical and “traditional” architecture above others.
Codes and Standards | Mar 3, 2021
Texas freeze raises questions about risks of electrifying buildings
Gas stoves helped residents cook, boil water when power went out.
Codes and Standards | Mar 2, 2021
New Seattle building code eliminates fossil fuels for most space and water heating
Also increases on-site solar photovoltaics, reduces envelope heat loss, air leakage, and interior lighting power allowances.
Codes and Standards | Feb 25, 2021
It’s not just lumber—roofing material prices are also on the rise
Lower demand for petroleum products means less asphalt production.
Codes and Standards | Feb 23, 2021
USGBC offers education on LEED Safety First pilot credits
Four courses address COVID-19.
Codes and Standards | Feb 23, 2021
ASHRAE Epidemic Task Force releases updated Building Readiness Guide
Includes flush calculations to reduce time and energy to clear contaminants between occupancy periods.