Bad deal, I really dis like the duplexes and quads that have the ventilation from dryer through the concrete floor, or up and over and back down, I won't warranty a dryer of mine if they are plugged. I let the customer know, get maint. to clean out, or pay me to do it. Cause on site maint. they rarely do. Wonder why the thermal didn't close out on that one that produced the fire?