Allied did a great job installing our central air conditionin many years ago. I asked for a recommendation for the unit and they gave me various alternatives based on quality, purchase price, and operating cost. They also take care of our hot water system that is least 50 years old. They have never tried to talk us into buying a new system, always stating that it's a good system in good shape. We also have a service contract with them for inspection and maintenance of both systems. Allied is a completely reliable and up-front company which trust completely.