A professional chassis somebody has to work around in place. An induction generator, which is a power supply in its own right. A steam oven with plumbing inside an oven cavity. Those three set the top of this list, and each of their pages says so in those words.
Everything else follows the work rather than the make. Ventilation is the cheap end and reads that way; a knob, a filter, a burner cap seated wrong and most induction call-outs cost the visit and nothing more. Where that is the honest answer, the page says it before you have paid to hear it.