Mcdermith Incorporated | Local HVAC Services in Decatur, IL

Warning signs include a yellow burner flame instead of blue, soot around the furnace, excessive moisture on windows, and a persistent, stale smell. However, CO is odorless and invisible, so the best protection is an annual professional inspection by our certified technicians. We check heat exchangers for cracks, test combustion, and ensure proper venting—common failure points in our local climate that can lead to dangerous leaks.

Given our local environment, a multi-layered approach works best. We recommend starting with a high-efficiency air filter (MERV 11-13) to capture common allergens. For more robust protection, we often install whole-home air purifiers with UV-C light to neutralize mold spores and bacteria, or humidifiers/dehumidifiers to maintain optimal moisture levels, which reduces dust mites and mold growth—key contributors to poor air quality here.

We advise against waiting, especially in Decatur. Older furnaces become less efficient and more prone to the heat exchanger cracks that cause carbon monoxide leaks. A proactive replacement with a modern, high-efficiency model not only eliminates this safety risk but also significantly lowers your heating bills. We can assess your system's age and condition and show you the safety and efficiency benefits of an upgrade tailored to our local weather.