Biermann Heating & Air Conditioning

Biermann Heating and Air Conditioning has earned its stripes as Round Lake's go-to heating specialist through decades of reliable service. The company holds a strong 4.9-star rating drawn from 45 client reviews reflecting consistent quality work. Operating around the clock seven days a week, the team tackles everything from stubborn furnace failures to complete system installations. Dave Biermann leads the operation, supported by technician Shawn, serving homeowners throughout Round Lake, Grayslake, and the surrounding Lake County communities.

What distinguishes this contractor emerges clearly in how they handle emergencies: multiple reviewers describe same-day arrivals during weekends, holidays, and late-night crises. Dave arrived at one home within hours on Christmas Day while on vacation to help a freezing household. Another reviewer notes Dave refused payment after diagnosing a furnace issue, charging only the part cost. The team stocks common components on their vehicles, enabling one-visit repairs rather than multi-day delays. Shawn handled a Sunday diagnosis within 30 minutes after Dave was occupied, demonstrating seamless backup coordination.

Customer stories read like case studies in responsive service. When Stephanie Johns furnace blew cold air, Dave offered troubleshooting by phone versus sending Shawn for an in-person look, respecting her choice either way. Milt Drucker woke to a dead furnace mid-winter and Dave arrived quickly with parts already in tow, restoring heat within an hour. Edward Valek faced a furnace failure the same day his wife learned she'd lost her job, and Dave accepted only part cost that day, later installing their full replacement system. These moments define the business character.