Upon arrival found rollout safety tripped Furnace producing more than 1500ppm carbon monoxide out the exhaust Heat exchanger is failed **Extremely dangerous to operate in its current state** Furnace needs replaced 2003 Bryant 100,000btu two stage 90% efficient furnace 21" wide 5 ton AC 2" exhaust and intake piping roughly 35' long 12x24 return drop 3/8 × 1-1/8" line set 82" overall height available if the 5" flex duct on the back side is moved up