I have just bought an Edelmetall Burner so that I didn't have to rely on my electric stove. My back porch, just off the kitchen, is covered, but open on two sides and I was planning on using the burner there. The directions warn against using it near wood surfaces, though, so I am a little worried about the wood floor of the porch. Is there enough heat generated by this burner that it could damage the floor below? Would I be better off if I got the leg extensions?