Warren is not only professional but very knowledgeable. He installed our air conditioning unit when we moved into our new home 4 years ago and services our furnace every year. Recently when our earthquake shut off switch got tripped, he came over and showed us how to reset it, the furnace, and relight the pilot on the water heater. He is very thorough and always asks permission to enter our home — while he is putting on shoe covers. 5 stars Warren! We appreciate your good service over the years!