Here's the brutal truth: the majority of HVAC failures take place because someone skipped a step. Didn't calculate the load properly. Used incorrect equipment. Misjudged the insulation needs. We've personally fixed hundreds of these failures. And each time, we remember another insight. Like in 2017, when we started adding smart thermostats to each installation. Why? Because Sarah, our master tech, got sick of watching homeowners lose money on inefficient temperature settings. Now clients save hundreds yearly.