the 1 i pinted out will keep the temps 15-20degrees warmer then ambient temps and is made for green house propogation. carpet on the floor the heat mat ya should be set thenlinksys said:senseless... that makes a lot of sense thanks dude... i was looking into the heating mats and they say it will only raise the temp a couple of degrees from the temp of the room... now if the room is too cold will it be able to get it where the soil needs to be?