For over 40 years, John P. Timmerman Co. has been one of the oldest Lennox heating and air-conditioning system dealers in Lima, Ohio. The company specializes in residential and commercial heating, cooling, plumbing, electrical and bathroom remodeling services. It supplies, installs, services and repairs furnaces, air conditioners, heating pumps, indoor air quality equipment, programmable thermostats as well as gas grills. In addition to Lennox, John P. Timmerman Co. supplies products from Ducane and Empire Comfort Systems (ECS).