I have used Sierra air for 3 years for maintenance and a new HVAC system on a 12 year old property. They were the company my new home builder used to install the HVAC system. I have had them come out a couple of times for maintenance at my new house and the techs have always been very helpful! Recently, I went to Lowes for a new HVAC system and Lowes sent out SIerra air. They replaced the AC and heater in my 12 year old rental property. I feel like they are honest, they treat both of my properties with respect, and their pricing is fair.