Active| _________ solar heating system uses fluids pumped through collectors to gather solar heat. Stratification|air _______________ is the layering of air in a room based on temperature. Catalytic|________ element is a device used in wood-burning stoves that helps reduce smoke emissions. Chilled-beam|a kind of cooling system that employs radiators (chilled beams) mounted near the ceiling through which chilled water flows. Creosote|a black, sticky combustible byproduct created when wood is burned in a stove or fireplace. Direct-fired|a _______________ make-up air unit is an air handler that heats and replaces indoor air that is lost from a building through exhaust vents. Evaporative| a kind of cooler that cools air by evaporating water. Configuration|hot aisle/cold aisle _____________ is a method used to install equipment cabinets in computer rooms to manage the flow of warm and cool air out of and into the cabinets. Thermosiphon|a __________ system is a type of passive solar heating system in which the difference in fluid temperature in different parts of the system causes the fluids to flow through the system. HT|Type __ vent is a metal vent capable of withstanding temperatures up to 1,000-degrees F used to vent wood-burning stoves and furnaces. PL|Type __ vent is a type of metal specifically designed for stoves that burn wood pellets or corn. Valance|a type of cooling system in which chilled water is circulated through fined-tube radiators located near the ceiling around the perimeter or a room.