Cooling system for buildings
Cooling system for gear reducers
Cooling, heating and ventilation system
Current monitoring control for electrically powered devices
Debris box
Detection apparatus
Device for inspection and/or repair of the tubes of a steam gene
Device for testing and/or repairing steam generator tubes
Devices for heating premises by the use of heat pumps and method
Diagnostic system for heat pump
Direct condensation radiator for spacecraft
Double wall tubing assembly and method of making same
Dry cooling system
Dual storage heating and cooling system
Dual temperature thermostatic controller
Duct type multizone air conditioning system
Duty cycle controller
Economizer comfort index control
Electronic circuit for controlling a heating or air-conditioning
Electronic programmable thermostat