Welling Service Heat and Air Company was founded by Dennis Peterson in 1990 specializing in weekend and after hours heat and air service. Dennis' sons Cody and Will started helping him shortly after on the weekends and when school was out.
In 2007 Dennis retired from Northeastern State University where he had supervised the maintenance department for over twenty years. Welling Service Heat and Air Company went from a part time side business to a full time operation.
Will started working full time in the business after going to school at NSU and earned his Journeymen license in 2009.
Cody went to Oklahoma State University studying Construction Management Technology. In 2008 he went to work for major nationwide General Contractor as a Field Engineer. In 2011 Cody returned to Tahlequah to help with the heating and air business and in 2012 earned his Journeymen's license allowing Dennis to begin the retirement process.