Answer by  
                                                                                          Stuart (21)
                                                            
                          
                          
                                                          The installation of a central heating, ventilating, and air conditioning (HVAC) system starts with an accurate survey of the space and a design to meet heat loss and dehumidification requirements.
 
 Installation consists of provisioning electrical power, running return and supply duct, installing and connecting outdoor condenser and interior air handler.