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  2. Block diagram - Wikipedia

    en.wikipedia.org/wiki/Block_diagram

    A block diagram is a diagram of a system in which the principal parts or functions are represented by blocks connected by lines that show the relationships of the blocks. [1] They are heavily used in engineering in hardware design , electronic design , software design , and process flow diagrams .

  3. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.

  4. Underfloor air distribution - Wikipedia

    en.wikipedia.org/wiki/Underfloor_air_distribution

    The system was introduced into office buildings in the 1970s in West Germany, with the addition of occupant-controlled localized supply diffusers. Nowadays UFAD system has achieved considerable acceptance in Europe, South Africa, and Japan. [1]

  5. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    An air conditioning system, or a standalone air conditioner, provides cooling and/or humidity control for all or part of a building. Air conditioned buildings often have sealed windows, because open windows would work against the system intended to maintain constant indoor air conditions.

  6. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    Air conditioning equipment will reduce the absolute humidity of the air processed by the system if the surface of the evaporator coil is significantly cooler than the dew point of the surrounding air. An air conditioner designed for an occupied space will typically achieve a 30% to 60% relative humidity in the occupied space. [51]

  7. Inverter compressor - Wikipedia

    en.wikipedia.org/wiki/Inverter_compressor

    The drive modulates the compressor speed and prevents it from operating out of the compressor operating limits. The inverter frequency drives need to use algorithms developed specifically for heating, ventilation and air conditioning (HVAC) or for refrigeration. They ensure that the system will run within the application constraints.

  8. List of equipment of the South African Army - Wikipedia

    en.wikipedia.org/wiki/List_of_equipment_of_the...

    The T5-52 is a South African truck-mounted self-propelled howitzer, it is the latest piece of South African Artillery that was launched in 2018. 6 units of T5-52 SPHs were received from Denel as a replacement for the 6 G5 towed howitzers sold to Saudi Arabia. The Army plans to acquire more T5-52s if funding is adequate.

  9. Evaporative cooler - Wikipedia

    en.wikipedia.org/wiki/Evaporative_cooler

    An evaporative cooler (also known as evaporative air conditioner, swamp cooler, swamp box, desert cooler and wet air cooler) is a device that cools air through the evaporation of water. Evaporative cooling differs from other air conditioning systems, which use vapor-compression or absorption refrigeration cycles.