Building mechanical installations, which play an important role in construction, are divided into different parts, which include the following. Thermal facilities (heating and cooling) Just as water flows from a higher level to a lower level, the way thermal systems work is always to move heat from a hotter object to a colder object. In thermal installations, the cold generator makes the house cooler by removing heat from the air, and the heat generator makes the house warmer by transferring heat to the air. Natural ventilation, mechanical ventilation and combined ventilation are the main components of thermal facilities. Water and sewage facilities (sanitary) Water facilities in buildings are designed and built as distribution tanks or service tanks for purposes such as water storage, balancing the uniform supply flow, uneven consumption flow, as well as supplying and balancing the pressure. Also, the need to return the generated wastewater to nature, the use of wastewater facilities in buildings is very necessary. Gas supply facilities Determining the rules and regulations related to the gas supply facilities of buildings is the responsibility of the gas company and the engineering system organization. Alemak, regulator, gas meter, fastener, hose, gas consumption valve, energy label and thermostat valve are among the components of gas supply facilities. Swimming pool facilities (swimming pool, jacuzzi, sauna) Swimming pool facilities are divided into 6 main parts based on facilities, i.e. water circulation circuit, water fountain and fountain, heaters, automatic chemical systems, lighting and control system. Firefighting facilities (fire alarm, fire extinguishing) Due to the increase of unexpected accidents in urban buildings, the fire department and safety services of Tehran municipality have considered the use of fire extinguishing systems as one of the main parts of building facilities. According to the rules of firefighting networks, different parts of firefighting systems include things such as water tanks, water pumps, piping, connections, and firefighting water boxes in parking lots and floors of buildings. Steam systems facilities Choosing the right size of pipes and valves, such as control valves, pressure reduction and steam traps, will make steam system installations perform more ideally. Elevator facilities Elevator facilities provide the necessary driving force to move the elevator cabin. Of course, in traction elevators, the power required to move the cabin is provided by the balance system.

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