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CEE Study Identifies Key Criteria For Buildings Most Likely To Reap Significant Cost/Energy Savings Via Duct Sealing
  • USA - English


News provided by

Brenner Associates

Mar 01, 2018, 05:30 ET

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Identifying buildings most likely to have leaky ductwork
Identifying buildings most likely to have leaky ductwork

Our study identified key criteria to pinpoint those buildings that are most likely to experience leakage.

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CENTERVILLE, Ohio (PRWEB) March 01, 2018 -- A new study from the Center for Energy and Environment (CEE) examining the viability of duct sealing in commercial buildings, revealed several criteria that could be used to help identify buildings most likely to realize significant energy and cost saving benefits from duct sealing. These criteria include system type, operating pressure, design flow and apparent tightness. The study also concluded that aerosol-based duct sealing proved more effective and produced a faster return on investment (ROI) as compared to traditional duct sealing methods, particularly when access to ductwork was limited.

Highlights of the study "Duct Leakage and Retrofit Duct Sealing in Minnesota Commercial and Institutional Buildings" were presented by CEE Senior Research Engineer, Josh Quinnell, Ph.D., at an Aeroseal LLC-sponsored webinar held earlier this month.

“Duct leakage can result in a major hit on buildings’ energy use and cause a substantial increase in operating costs,” said Quinnell. “Our study identified key criteria to pinpoint those buildings that are most likely to experience leakage, and consequently benefit the most from duct sealing.”

The four criteria that can be helpful in identifying buildings with the biggest potential for energy savings include:

• System Type: Exhaust systems, especially those traversing unconditioned space; supply systems located in ceiling plenum returns; or supply systems with fully ducted returns.

• Operating Pressure: Operating pressure of at least 0.5” w.g. are acceptable, above 1.0” w.g. are preferred.

• Design Flow: Design flows greater than 4,000 cfm are acceptable, greater than 10,000 cfm are preferred.

• Apparent Tightness: Systems with existing sealant and systems of apparently tight construction (spiral, flanged & gasketed ductwork) are less likely to have substantial leakage.

The study also found that aerosol-based duct sealing was typically more effective than traditional duct sealing (tape / mastic), especially when the ducts were insulated or access to the entire duct system was limited.

“Using aeroseal technology, the median sealing rate was 86% and often reduced effectively to zero – among the highest energy conservation rates we’ve studied,” said Quinnell. “Our study predicts an average ROI of around seven years, achieved by first identifying the buildings best suited for sealing and then using the aerosol sealing process to do the work.”

For more information on the CEE study visit https://www.mncee.org. Visit http://bit.ly/2sM2MRd for access to the infographics. For a copy of the full report, visit http://bit.ly/2BFcuUD. For information on aeroseal technology visit http://www.aeroseal.com.

BRAD BRENNER, Brenner Associates, +1 (503) 736-0610, [email protected]

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CEE Study: Commercial buildings and duct leakage
CEE Study: Commercial buildings and duct leakage
CEE Study: Commercial buildings and duct leakage

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