Let me share the brutal truth: nearly all HVAC failures occur because someone ignored a step. Did not calculate the load accurately. Used incorrect equipment. Got wrong the insulation needs. We have fixed hundreds of these messes. And each and every time, we record another insight. Like in 2017, when we began adding smart thermostats to all installation. Why? Because Sarah, our master tech, got sick of watching homeowners lose money on inefficient temperature control. Now clients save hundreds yearly.