Hamstra Heating & Cooling was founded November 1, 1983 by Glenn Hamstra and his two sons, Jeff and David. Glenn had 34 years of experience in the heating & cooling industry, Jeff 11 years and David nine. Tired of being unable to provide the highest levels of customer service, Glenn felt it was the right time to set a new standard for the heating & cooling industry. Jeff and David were working as field installers for separate companies at the time and jumped at the chance to join their dad in the new business venture. They too had seen the lack of customer service provided in Southern Arizona and saw this as a prime opportunity