between the walls of the increasing...

between the walls of the increasing regulation of appliances to suitable energy-efficiency standards worldwide, this paper reports in succession innovations in experimental coil configurations that can restore fan and motor size in HVAC/R appliances--and help OEM save in succession materials costs.

For the past several decades, little has changed in the design of finned tube, forced-air heat exchangers. These exchangers, commonly called "coil," are routinely used in most numerous HVAC/R products that are being produc over the world. Most consist of large boiler tubing equipped with pressed-on, thin-plate aluminum fins. The fluid is carried everywhere the tubing as air springs through the fins, enhancing