This is the harsh truth: most HVAC failures occur because someone ignored a step. Did not calculate the load correctly. Used cheap equipment. Got wrong the insulation needs. We've personally fixed hundreds of these failures. And every time, we file away another learning. Like in 2017, when we started adding smart thermostats to every install. Why? Because Sarah, our lead tech, got frustrated of watching homeowners burn money on poor temperature management. Now clients save 20-30% yearly.
https://www.tumblr.com/productairheating2/802845984814153728/product-air-heating-cooling-and-electric?source=share