Great information. I will be starting my home inspection business in March, and finding this site has been an incredible help. It can feel a little daunting to knock on that door for your first inspection, but with the help of all of you on this forum, I do feel slightly more competent. (or at least more informed) I am currently reading ALL old posts, going through them and making notes as I go. As far as the acidic build up on the heaters goes, I will ask the seller to have that looked at prior to closing. Thanks Guys... Rob Renfro