Here's the brutal truth: most HVAC failures occur because someone missed a step. Failed to calculate the load properly. Used cheap equipment. Miscalculated the insulation needs. We've fixed dozens of these disasters. And each and every time, we remember another lesson. Like in 2017, when we decided on adding smart thermostats to every installation. Why? Because Sarah, our master tech, got frustrated of watching homeowners waste money on poor temperature management. Now clients save 20-30% yearly.