Nairn is the owner and President of Ottawa Plumbing & Heating. He is a licensed G1 gas fitter, oil burner mechanic and refrigeration mechanic with more than 47 years of experience in the HVAC industry. Nairn has always lived and worked in Ottawa, beginning his career as an oil truck driver in 1969. In 1981, he started his own HVAC business, NH Reid Enterprises, along with his wife, Molly. His brother joined the company as a partner in 1983. After a decade in business together, the brothers divided NH Reid Enterprises and Nairn went back out on his own, founding Climate Control Inc. Then, in 2001, Nairn purchased Ottawa Plumbing & Heating from Robert Hobbs and Bob Currie, after Robert became ill. Shortly thereafter, Nairn fell ill himself and chose to close Climate Control Inc. to focus on the smaller and more easily manageable Ottawa Plumbing & Heating. After making a full recovery, Nairn threw his full effort and energy into building Ottawa Plumbing & Heating into the thriving local business it is today.