I've been using Cooper for over a decade now for all of my HVAC needs. It started with a Lennox A/C with humidifier installation. Absolutely perfect. Over the years they have serviced my aging furnace, up until this week when the 24 year beast gasped it's last breath. Just got a 2-stage 96% efficiency furnace (thanks Colorado!) that will last us well into the future. Cooper did yet another amazing installation job after thoroughly explaining all the options. Financing was a breeze and they registered the furnace warranty for me as well. Cooper is hands down the best HVAC company serving the Front Range!