Arrived for duct cleaning estimate. Two system home. Both systems have significant biological growth on the evaporator coils and the blower wheels. A 9" duct has a hole in it and needs to be replaced with a new 9" x20 ft. Highly suggest a level 2 duct cleaning on each system to include all ducts in addition to blower wheel and evaporator coil cleaning. A UV system is suggested in each air handler to prevent biological growth from coming back into the system. Neither system has a drain safety switch. This is an important safety feature that can prevent water damage in the home if there is a blockage in the condensate drain. Estimates are being sent via email.