When it comes to saving on your energy dollars, moving cool air inside your home with a variable-speed fan coil can make a surprising difference. Variable-speed enables better dehumidification in summer and more consistent temperatures through out your home along with quieter operation. Less humidity means you’ll feel comfortable at a slightly higher temperature.An air handler, or air dealing with unit, is a gadget used to control and circle air as a major aspect of a warming, ventilating, and cooling framework. An air handler is typically an enormous metal box containing a blower, warming or cooling components, channel racks or chambers, sound attenuators, and dampers