Abstract: A method and device for controlling certain two-speed ECMs (Electronically Commutated Motors) used in refrigeration evaporator coils. Said method and device monitors and responds to the status of the cooling system, causing the ECMs to operate at high speed when the cooling system is actively cooling, and at low speed when the cooling system is idle.

Abstract: An energy saving apparatus for use with a heat exchange system having a cooled chamber, a compressor, a condenser, an evaporator, an evaporator fan, and refrigerant within refrigerant carrying lines has an evaporator fan controller for monitoring operational status of the system (cooling or non-cooling) and setting an energy saving operational speed for the evaporator fan based on the operational status of the system (cooling or non-cooling) and a current sensor coupled to the evaporator fan controller for detecting the operational status of the system (cooling or non-cooling). If the system is detected as cooling, the evaporator fan controller directs the evaporator fan to operate at a high speed and if the system is detected as not cooling (non-cooling), the evaporator fan controller decreases the operational speed of the evaporator fan to a low speed, thereby decreasing evaporator fan produced heat, resulting in an overall decreased energy requirement for the heat exchange system.

Abstract: A means for concealing an antenna within an extension of a common roof structure using an electrically shortened element laminated between two layers of non-RF conductive material which add to the strength of the invention as well as concealability. The antenna itself comprises a vertical radiator and a helical counterpoise of metal strip, wire, or deposited metal fed at the center point. The entire antenna is housed between laminated layers of plastic in the form of a vent pipe.