Not if you formed a vacuum with two big fans at the end of the pipe work blowing heat out a window, and a pump pumping the condensate back to the plant.
But as Bob H pointed out, if Rossi removed the items without documentation then legally you must give the defendant the benefit of the doubt and rule against Rossi.
If Rossi destroyed the evidence of upstairs fans, pumps, heating tapes and who knows what else then you cannot use those in an argument against IH. ( he could even been sending RF down the pipe to confuse the thermocouples) If you don't have evidence then the defendant wins.