Central air conditioning ventilation duct installation precautions is what

 
Central air - conditioning ventilation ducts installation methods are: (1) tuyere, valves, inspection doors and automatic control agencies should not be set at the support, hanger; (3) the delivery of flammable, explosive gas or installed in flammable and explosive environment of the duct system should have a good grounding; through the living area or other auxiliary production room must be tight, and (4) duct and fan and air handling equipment and other equipment at the junction should be used as a flexible short pipe or design requirements.