Here's the ugly truth: most HVAC failures occur because someone ignored a step. Didn't calculate the load accurately. Used undersized equipment. Got wrong the insulation needs. We have fixed hundreds of these messes. And each time, we remember another lesson. Like in 2017, when we started adding smart thermostats to all install. Why? Because Sarah, our senior tech, got sick of watching homeowners waste money on bad temperature management. Now clients save $500+ yearly. https://penzu.com/p/7a698383db3a9c29