On second thought, I'm not sure they would be able to handle the current. I think the traces on the PCB would act as a fuse and literally burn up.
But you could probably modify the #HestiaPi to control a smart outlet, or relay or contactor.
The easiest plan would be to set it up much in the same way as your HVAC. Those do the signaling running on 24V AC, but your furnace/air conditioner uses 120 or 240V AC.