I want to think that is true. If I remember correctly, one of the members on here damaged their carpet a while back. If you can't find something like a piece of plywood to set it on, you can go to Lowes or Home Depot and buy a piece of Melamine and have them cut it to the size you want and set the tub on it. That is what I have my tubs setting on. I have my heat pads and thermostat probes mounted to the Melamine so I can just lift the tubs off to move them without having to mess with the wires.