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 | Nov 21, 2017
USGBC adopts ‘RELi’ resilient building and design standard
The standard prescribes methods for designing more resilient buildings and communities.
Codes and Standards | Nov 21, 2017
Updated material transparency web site and hazardous building materials list unveiled
Improved versions of tools aimed at use of healthier construction supplies.
Codes and Standards | Nov 16, 2017
White roofing isn’t always the best choice
Adverse effects include heat reflection onto nearby walls.
Codes and Standards | Nov 15, 2017
U.S. finalizes tariffs on Canadian softwood lumber
The duties would add 20% or more to cost if trade negotiators can’t find common ground.
Codes and Standards | Nov 15, 2017
NBI stretch code a tool for accelerating efficiency standards
It provides a strategy to leapfrog minimum code requirements.
Codes and Standards | Nov 14, 2017
California bill would require purchase of low-carbon construction products
Contractors would have to source products based on greenhouse gas impact, not price, on state projects.
Codes and Standards | Nov 13, 2017
New AIA contract document for facility support services released
Updated form intended to be used with owner-architect agreements.
Codes and Standards | Nov 9, 2017
NIBS, NBI issue guidance document to help communities achieve energy goals
Outcome-based codes compliance path looks at building’s actual performance.
Codes and Standards | Nov 7, 2017
Underwriters Laboratories launches wellness certification
First certification program that verifies products’ compliance with the WELL Building Standard.
Codes and Standards | Nov 6, 2017
Registration now open for Canada’s first Zero Carbon Building (ZCB) program
Standard is designed to be applicable across many types of new and existing buildings.
