Inspected two York split furnace systems R22 air conditioner notice both main electronic fuel delivery system leaking natural gas into the burners also notice outdoor heat transfer media coils dirty on both systems also exhaust removal system leaking oil an over Max allowed amps, indoor air circulation systems needs removal and cleaning, spinning off balance due to dirt build up. A couple other safety recommendations made for system upgrades including a basic power protection device that will place a protection warranty on system also replacement of main electrical control system also a compressor performance enhancement system renovation. Unit was cooling at time of the departure.