Can a bed heater be smaller than the bed and still give good results?

[curious aardvark]

as long as you have an aluminium bed - then it should be fine. You might need to boost the temps to get the edges, but aluminium conducts heat well.

Not sure how well it would work on an all glass bed though.

[logic]

Thanks for your reply :-) I'll proceed then with a 300x300 heater on the 400x400 aluminum plate, and I'll give an update once I know how it's going. :-)