Heaters
Heaters are appliances whose purpose is to generate heat for the building. This can be done via central heating. Such a system contains a boiler, furnace, or heat pump to heat water, steam, or air in a central location such as a furnace room in a home, or a mechanical room in a large building. The heat can be transferred by convection, conduction, or radiation.
Ventilators
Ventilation is the process of changing or replacing air in any space to control temperature or remove any combination of moisture, odors, smoke, heat, dust, airborne bacteria, or carbon dioxide, and to replenish oxygen. Ventilation includes both the exchange of air with the outside as well as circulation of air within the building. It is one of the most important factors for maintaining acceptable indoor air quality in buildings. Methods for ventilating a building may be divided into mechanical/forced and natural types.
Cooling Towers
A cooling Tower is a heat rejection device that rejects waste heat to the atmosphere through the cooling of a water stream to a lower temperature. Cooling towers may either use the evaporation of water to remove process heat and cool the working fluid to near the wet-bulb air temperature or, in the case of closed circuit dry cooling towers, rely solely on air to cool the working fluid to near the dry-bulb air temperature.
Exhaust Fans
Exhaust fans work by sucking hot or humid air out of a small, localized area, allowing fresh air to enter from elsewhere in order to replace it. The warm air that's drawn out using an exhaust fan is then pulled through a ducting system and expelled outside.
Inline fans
In-line fans are remote fans integrated in the duct work and generally placed in either the attic or crawlspace. Because they are located remotely there is no detectable noise within living spaces. In-line fans are ideal for exhausting areas where there is no clearance or space for a ceiling or a spot exhaust fan.
Chillers
A chiller is a machine that removes heat from a liquid via a vapor-compression or absorption refrigeration cycle. This liquid can then be circulated through a heat exchanger to cool equipment, or another process stream such as air or process water. As a necessary by product, refrigeration creates waste heat that must be exhausted to ambience, or for greater efficiency, recovered for heating purposes.
