There is no easy way to know how much the Mac Studio can pull without using a wall meter. We know that reported power consumption is inaccurate on M1 devices,

There is no easy way to know how much the Mac Studio can pull without using a wall meter. We know that reported power consumption is inaccurate on M1 devices, from Anadtech's testing of the M1 Max, and I doubt it's very different on the Mac Studio. In any case, the difference is not going to be much. As far as heating a room, really, I can assure you that you will barely notice 100W. There are screens that will use more power than that (such as, amongst others, the XDR screen). I say this as someone who lived with a 900W power hog of a computer in places where temperature hits 42 in shade.