you can easily find commercial HVAC system of 1MW power:
As usual Jed you pretend to be expert of everything but you are not even able to make an internet search.
As usual Ele you are missing the point.
The link describes a heat pump with 1MW cooling at 150kW power in. You will note that for Rossi's heat exchanger any power used, unless very small, is quite impossible due to the fact that the FPL power figures and the ecat power in figures match.
Hence Rossi's heat exchanger is just not possible.