Applied to A/C Intake Covers
City of Mesa, Arizona - May 2005
22
Aluminum 5ft x 5ft shields. The Air intake is heating in excess of 250°F,
which melts the 165°F rated fusible links, causing the intake dampers to close
and shut down the Air Conditioning system.
SUPERTHERM
® was
applied to reduce temperatures and keep the A/C system fully functional.
So
far, test results calculated by Nick DeSantis, Energy Coordinator for the City
of Mesa, show over $700 per year per unit in savings with
SUPERTHERM
®. This equals a payback of 52 days including materials
and labour. These calculations were taken during a 70-80°F temperature, but
greater savings are expected once temperatures rise to 100°F and above, in
Arizona.
Project Pictures courtesy of Marvin McCardle - E3
Coatings Inc.
NOTE : Duct Insulation
Best Practice: Ducts in unconditioned spaces must be insulated.
To the extent possible, ducts should be placed inside conditioned space. In conditioned spaces, they require minimal insulation. If the ducts are placed in unconditioned spaces, due to the extreme summer temperatures in these spaces, 10% to 30% of the energy used to cool the air can be lost to conduction through the duct surfaces. Therefore, they must be insulated. ENERGY STAR recommends R-8 insulation levels for supply ducts in unconditioned attics and R-4 in crawl spaces (EPA 2000, based on Treidler et al. 1996).
Obviously SUPERTHERM ® with an Effective R value of RE19 exceeds the above recommendation.
