Our 24-yr old Lennox furnace stopped working in early February. I got the referral from one of my friends. They came to install a new Armstrong furnace on a freezing cold day. A couple of days after the installation, the new furnace started to have a minor intermittent noise issue. Contacted Eric and their technician managed to find the issue and added a trap to solve the issue. We are very happy with the service and the price. Highly recommended!