Upright piano and underfloor heating - how can I protect the piano?

[aish466]

I have an upright Yamaha U3 piano and am moving to a new house. The new place has a separate music room that we got extended but the room has underfloor heating.

My piano has been great and hasn't needed tuning even once in the 3 years I have owned it. I am scared that the underfloor heating might damage the piano(and the other instruments - violin and guitar - I have)

I have searched online but couldn't find much information. How effective is an underfloor heating mat for the piano? Is there anything else that I need to use to protect it? A humidifier? If so, what are my options?

Also, I have the option of putting either tiles or a carpet on the floor. Which one would be better - or would it not make any difference?

Thank you!