Overall Comfort provides expert heating, cooling, and indoor air quality services to Herrin, IL and surrounding Southern Illinois communities. Our licensed HVAC technicians deliver reliable installation, repair, and maintenance for furnaces, air conditioners, heat pumps, and ductless mini-split systems. We specialize in energy-efficient Lennox systems, fast emergency HVAC service, and indoor air quality upgrades that make your home healthier and more comfortable. Whether you need AC installation, heating repair, a seasonal tune-up, or air purification, our team is available 24/7 to keep your home or business comfortable in every season. Call today for trusted local HVAC service that puts your comfort first.