Let me share the brutal truth: nearly all HVAC failures occur because someone ignored a step. Failed to calculate the load properly. Used undersized equipment. Miscalculated the insulation needs. We've personally fixed countless of these messes. And each time, we remember another learning. Like in 2017, when we decided on adding smart thermostats to each install. Why? Because Sarah, our master tech, got frustrated of watching homeowners lose money on bad temperature settings. Now clients save $500+ yearly.