ConsultĀ a professional.
Whether it's 12" or 12' off the ground there are too many safety and code issues for the average homeowner to tackle. Better to do it right than to regret it later.
We have written on good bit on this subject: Please take a look at these blogs we wrote!
http://blog.akatlanta.com/2010/11/10-mistakes-not-to-make-when-heating.html
http://blog.akatlanta.com/2010/11/7 ... read more