The Air Heat Exchanger in direct-combustion furnaces.A furnace is a device used for heating and the term furnace on its own is generally used to describe household heating systems based on a central furnace, typical in many residences, are not ‘coils’.They are, instead, gas-to-air heat exchangers that are typically made of stamped steel sheet metal. Heat flow from a high to a low temperature body occurs spontaneously. Cracked heat exchanger is therefore a dangerous situation requiring immediate attention because combustion products are then likely to enter the building.
Generally, air conditioning can refer to any form of technological cooling, heating, ventilation, or disinfection that modifies the condition of air.An air conditioner is a major or home appliance, system, or mechanism designed to change the air temperature and humidity within an area.the circuit board timer counts a determined amount of time and energizes the blower relay. This relay powers up the blower motor and air is then pushed over the heat exchanger. The heated or vaporized fluid exits the boiler for use in various processes or heating applications.an evenly distributed air or gas is passed upward through a finely divided bed of solid particles such as sand supported on a fine mesh, the particles are undisturbed at low velocity. further increase in air velocity, there is bubble formation, vigorous turbulence, rapid mixing and formation of dense defined bed surface.