This is the ugly truth: nearly all HVAC failures take place because someone ignored a step. Didn't calculate the load correctly. Used cheap equipment. Miscalculated the insulation needs. We have fixed hundreds of these messes. And each time, we record another lesson. Like in 2017, when we decided on adding remote monitoring to each install. Why? Because Sarah, our master tech, got sick of watching homeowners lose money on poor temperature control. Now clients save hundreds yearly.