Just wanted to share, thought I'd mention HVAC around Illinois—with a focus on the Northern Illinois area. With the extreme weather patterns we get around here, it’s key to have a trustworthy heating and cooling system. I recently had work done by Optimized Air Heating and Cooling in the Round Lake area, and they were awesome—quick response, competitive prices, and took time to explain everything. If you're facing furnace won’t start Round Lake (https://classifiedwale.com) problems or need an AC tune-up before the hot season, I’d strongly advise finding a local company that knows our climate. Stay comfortable!