This is the harsh truth: the majority of HVAC failures take place because someone missed a step. Did not calculate the load correctly. Used undersized equipment. Misjudged the insulation needs. We've personally fixed dozens of these messes. And each time, we record another insight. Like in 2017, when we began adding smart thermostats to each install. Why? Because Sarah, our lead tech, got sick of watching homeowners burn money on inefficient temperature management. Now clients save hundreds yearly.