I had my Lennox air conditioning and heating system installed by Assured Comfort Heating, Air & Plumbing about five years ago. I'm currently dealing with a shotty product that isn't under warranty, despite paying a big amount of money to have them installed. There is an issue with the Freon being put in, which is causing the coils to blow out. They first told me it would have taken more than one thousand dollars to get it repaired, but they finally said they would repair it for around $600. I'm already paying them to come out and do routine maintenance on my system, and I'm still having to pay more for repairs. They don't seem to know their own products, and they can't guarantee quality service. I will not be using them again.