PDF documents require the free
All PDF documents open in a new browser window. Close the browser window to
return to the site.
Community Development Corporation: Magna, UT
- A kink in the refrigerant line prior to testing caused the Freus system’s capacity to be reduced. The system was repaired during testing. However, indoor conditions at the Freus site were warmer and more humid than indoor conditions at the conventional site. Therefore, direct comparison of EER for the two systems was not possible (since the warmer and more humid return air conditions cause an air conditioning system to operate more efficiently).
- Operating efficiency at high ambient temperatures is predicted to be higher for the Freus system based on system efficiency curves (from the manufacturer for the conventional system; from previous research findings for the Freus). At 100°F, and a high airflow of 500 CFM/ton, projected EER is 13.2 for the Freus, 10.8 for the SEER 14 system. At 400 CFM/ton, projected EER declines to 12.8 for the Freus, 10 for the SEER-14 system. These figures indicate a higher efficiency of between 22 percent and 28 percent at 100°F.
View evaluation method of this technology