Let me share the brutal truth: the majority of HVAC failures happen because someone skipped a step. Failed to calculate the load properly. Used incorrect equipment. Misjudged the insulation needs. We've personally fixed hundreds of these messes. And each time, we file away another learning. Like in 2017, when we began adding WiFi controls to each installation. Why? Because Sarah, our senior tech, got frustrated of watching homeowners lose money on poor temperature control. Now clients save $500+ yearly.
И еще вот - https://gorod.kr.ua/forum/showthread.php?p=312862#post312862 .