Originally begun as the Norfolk Furnace Company in 1921, Jacob Kalin founded the company known today as Kalins Indoor Comfort. His son, Sid Kalin, joined the business after WWII. After graduating from the University of Colorado in 1976, Sid's son, Bruce Kalin, joined the family business. Kalins expanded into Vermillion in 1983 and is now looking forward to offering home comfort solutions in the Yankton area.