How to find the value of SMD resistance?

An SMD (surface mounted Device) resistance is a type of resistance that is made by using SMT (surface mounted technology ). it occupies less space than the normal resistance.
Surface Mound Technology helps to reduce the size of components and significantly reduce the time it takes to manufacture a circuit.

➤➤➤Read More: How to find the value of SMD resistance?

What is the Difference Between Star and Delta?

What is the Difference Between Star and Delta?
Why we use Star and Delta?
ما الفرق بين النجم والدلتا؟
Qual è la differenza tra Star e Delta?
Was ist der Unterschied zwischen 
Stern und Delta?
Star和Delta之间有什么区别？
Quelle est la différence entre Star et Delta?
                                      В чем разница между звездой и дельтой?

➤➤➤ Read More: What is the Difference B/W Star and Delta?

What is heat wheel or thermal wheel ?

Was ist das Heizrad in der HLK?
Qual è la ruota di calore in HVAC?

ما هي عجلة الحرارة في التدفئة والتهوية وتكييف الهواء؟

A thermal wheel consists of a circular 
honeycomb matrix of heat-absorbing material, which is slowly rotated within the supply and exhaust air streams of an air-handling system.
Heat recovery systems are a great way to save energy, and money for building owners. It reduces energy bills by using the expelled air to heat (or cool) the incoming air, depending on the season (weather or climate). Most designs use a great invention known as the thermal wheel or the heat wheel to operate.

➤➤➤ Read More: What Is Heat Wheel or Thermal Wheel

FAN COIL UNIT OR VERTICAL FAN COIL UNIT

A fan coil unit (FCU), OR a Vertical Fan Coil-Unit (VFC), is a device consisting of (1) heating and/or cooling heat exchange or 'coils' and (2) fan. It is part of an HVAC system found in residential, commercial, and industrial buildings. A fan coil unit using ductwork, and is used to control the temperature in the space where it is installed, or serve more then one spaces. It is controlled either by a manual on/off switch or by a thermostat or BMS, which controls the throughput of water to the heat exchanger using a control valve (actuator) and the fan speed.

               ➤➤➤ Read more :  Fan Coil Unit