In 2012 I bought the house that you all have been helping repair, which was built in 1970. Everything was original except the central HVAC, which according to the stickers on it was manufactured in 2010 and installed by XYZ Co but I could not find a permit with the local municipality for the installation. The home inspector said it wasn't a big deal; I could not be held responsible nor get in any sort of trouble nor incur a fine, if it wasn't installed up to code before I bought the house. OK...Great! How much responsibility does the installer "XYZ Co." have, if it wasn't installed up to code?