Seriously, I don't know HOW many times I would get a call from a dealer working on the fire loop of a D6112 in a commercial site. EVERY time I would tell them it isn't listed for COMMERCIAL Fire and almost every time I would get, "I know, but this is what the customer wanted." Then I would remind him that if he didn't have something in writing that showed the customer understood the issues and they suffered a loss he was putting both his home or the business he worked for in jeopardy. Then I would either hear him shrug (don't ask) or get "I'm not worried. I rent."
Oy!
X.