I own a commercial building that was converted into17 offices. Mark has been instrumental in helping me balance the air flow between offices. He also installed additional A/C runs that were necessary but overlooked by the original A/C contractor. In addition, he installed 4 Honeywell Smart Thermostats so that I have wireless capability to control the temperatures in the offices from any remote location. He is timely, does great work and has fair pricing. Mark is "as good as it gets". I'm a big fan of Everest Air and Mark is your guy!!