United Energy is definately the Boiler expert in the GTA,Mike Long of United Energy gave me a complete education on the subject. I had a few other quotes many of them lower in price but I didn't feel nearly as comfortable with the competence of the people that showed up. United Energy's installers were excellent and showed up as scheduled, my boiler system and radiators were installed without a hitch. I would definately recommend them and I will be using them for all future installations and service.