James E. Knox & Son, Inc. was established in 1954. The original focus of the business was plumbing and continues to be a major focus of the business along with heating and air conditioning. Through years of experience Knox & Son has gained extensive knowledge in the plumbing trade.Knox and Son, Plumbing, Heating, and Air Conditioning will be happy to give you an estimate on your heating and cooling installation needs. Knox installs heat pumps and air conditioning systems, geothermal systems, retrofits, gas and oil fired boilers.