This is the brutal truth: nearly all HVAC failures take place because someone skipped a step. Did not calculate the load accurately. Used undersized equipment. Got wrong the insulation needs. We've fixed countless of these disasters. And each and every time, we file away another learning. Like in 2017, when we started adding WiFi controls to all system. Why? Because Sarah, our lead tech, got sick of watching homeowners waste money on poor temperature settings. Now clients save 20-30% yearly.
https://openlibrary.org/people/productairheating/lists/OL317070L/Product_Air_Heating