Thats rather funny actually. Everybody knows that know one would steal a Lummox! :-) The details are rather slim but Im guessing they are assuming that you have a poured solid concrete pad below the unit? Nobody does that anymore. Its all pre-cast or plastic. So the unit is accessable through the top? Thats nice. Most of the servicing is done through the side corner (usually the one closest to the wall). I can tell you that if I saw one of those it would get the quick glance and "Yes Mr./Mrs customer. Everything is fine." Besides, if a thief wants the copper that "safe" would hardly slow him down. That coil would get yanked right out through the slots. Bubba