Just wanted to share, here to discuss HVAC in Illinois—mainly near the Lake County suburbs. With the extreme weather fluctuations we get here, it’s super important to have a solid heating and cooling setup. I just had work done by a local HVAC company called Optimized Air Heating and Cooling Mundelein - Someplacenice.com, Air Heating and Cooling in Round Lake, and they were fantastic—fast turnaround, fair pricing, and walked me through the whole process. If you're experiencing furnace problems or need an AC checkup before the upcoming summer, I’d strongly advise finding a nearby company that understands Illinois weather. Stay comfortable!