1. LA Tech Research Symposium
Kathy Wyatt,
Technology Business development Center
Deborah F. Inman
College of Business
Introduction and Background
ACKNOWLEDGEMENTS
Shaurav Alam, Ph.D.
 Leakiness at aged deteriorated forced-air distribution systems is one
of the major causes of high-energy consumption in residential
housing units and commercial establishments.
 Leakage of conditioned air out of the deteriorated aged duct system
could lead to more than doubling the heating and cooling energy
costs in homes.
H-Liner Beyond – Deploy Paint-Liner and Seal HVAC Duct
Hang Zhang, MSc Student
Methodology Results and Conclusion
 Leak at a proper location such as at the bend of a duct
can result in significant air loss.
Objectives
 Reinvent every aspect of well deployed Cured In Place Pipe (CIPP)
Technology for development of an insitu rehabilitation technology
suitable for deteriorated HVAC ducts and ambient environment.
 Implementation and testing of the technology at lab environment
condition.
Results and Conclusion
Research Team
 COES and TTC, LA Tech University.
Dr. Ramu Ramachandran,
Associate Dean for Research, COES
 Research conducted by the Florida Solar Energy Center (FSEC),
Advanced Energy Corporation (AEC), Proctor Engineering (PE), and
ECOTOP confirmed sealing leaky distribution systems is one of the
most cost effective energy saving strategies.
 Florida based study showed repaired duct can reduce winter peak
demand in electrically heated homes by about 1.6 kW per house, or
at about 16.67% of the cost of building new electrical generation
capacity.
 Sealing leaky ducts is challenging.
 Conventional tape method is often difficult to deploy.
 Aerosol spray can effectively seal up to 0.50” diameter hole.
 Cured In Place Pipe (CIPP) Technology
 Ultra thin felt and Liquid (Resin/ Adhesive/Paint)
Challenges
 Cured liner must be lighter in comparison to traditional
CIPP.
A B C
I II III
IV V VI
Ultra Thin Felt
VII
Liquid (Resin/ Adhesive/Paint)
 Issues with Polyurethane based glue or Water based glue
 Epoxy based resin performed best.
 Issues with epoxy based resin – long term effect on human health due
inhalation of air blown through resin cured liner is not available.
 Liners were soaked in widely available water based paint.
 Corrosion study is currently underway. No corrosion observed since
installation in September 2015 .
Reference
• Roy A, Bartlett C, Alam S, Allouche E, and Grothala R. (2014). Cost Effective
Lining Technology for Sealing and Rehabilitation of Deteriorated HVAC Ducts.
ASHRAE Annual Conference, Seattle, WA.