Troy Koski and his wife Rhonda are long time residents of the Tri-City area. Rhonda has been in the Prescott area for more than 35 years and Troy has been here since 1982. They were married in 1987, have 2 children and now live in Chino Valley.

TDK Comfort Systems, Inc. was formed in 2000 from their home and later was located in a shop on their property in Chino Valley. They now have a thriving business on Highway 89 in Chino Valley. Their business has grown from just the two of them to more than 30 full time co-workers.