Just performed a Routine Maintenance & Tune Up on a 13yr old Lennox Natural Gas Furnace in the Wilmington Delaware area. The unit itself looked perfect and just needed a good cleaning and wipe down. The flue piping was a different story, being it was only taped to the wall and not properly connected. After explaining what needed to be done, I gave the homeowners a fair quote and they approved it on the spot. We will be back out soon to get them up to par! Thanks again megan, enjoy your day!