I would highly recommend Chicago Heating & Cooling. Matthew is very helpful, professional, and timely. He is willing to have an honest conversation about what is needed and discusses everything up front and is clear about what he is charging and guarantees his work. We hired him to tune-up our HVAC for the winter and fix a problem with our hot water heater. He wants his customers to be informed and even taught me how to fix the problem with our hot water heater myself in the future. He arrived on time, called ahead of time to confirm, and worked efficiently while here. He's very professional and courteous.