Top HVAC Companies in
DeKalb, IL (2026)

G&R Heating and Air serves DeKalb with furnace, heat pump, boiler, air conditioning, indoor air quality, smart thermostat, and maintenance services. The company describes itself as family-owned and operated, with licensed and certified HVAC technicians.

G&R offers 24/7 emergency HVAC service, a maintenance program with priority service and discounts, and flexible payment options. Its DeKalb page displays a 4.9 out of 5 rating based on over 5,400 reviews.

• When You Can Reach Them: 24/7 emergency HVAC service
• Who's Fixing Your HVAC: Licensed and certified HVAC technicians
• What It May Cost: Maintenance program, priority service, discounts, financing, and customized repayment plans
• Local Service Fit: Regional northern Illinois provider with a DeKalb service page
• Customer Confidence: 4.9 out of 5 rating shown on its DeKalb page, with reviews highlighting detailed explanations and quick service

Youngren's offers AC installation, AC replacement, emergency AC repair, preventive maintenance, ductless mini-splits, furnace installation, boiler service, heat pumps, indoor air quality, duct cleaning, and humidity solutions.

• When You Can Reach Them: The company states that it is open 24/7
• Who's Fixing Your HVAC: Bryant Factory Authorized Dealer and Mitsubishi mini-split specialist
• What It May Cost: Financing, maintenance plans, and installation savings are promoted
• Local Service Fit: Adjacent DeKalb County market presence with long regional history
• Customer Confidence: 90+ years serving DeKalb County communities, BBB Accredited status, and review snippets recommending the company

For HVAC specifically, Eco Temp lists air conditioner installation, air conditioner repair, furnace installation, furnace repair, commercial HVAC, heat pumps, and indoor air quality. Its review page states that the company has 288 five-star reviews across Chicago-area service hubs, with a 4.9-star average.

• When You Can Reach Them: Same-day and next-day appointment options are built into the online scheduling flow
• Who's Fixing Your HVAC: HVAC technicians covering residential and commercial heating, cooling, air quality, and heat pumps
• What It May Cost: Free system estimates, financing options, discounts, rebates, and warranty discussions are promoted
• Local Service Fit: Regional provider with a dedicated DeKalb HVAC service page
• Customer Confidence: 4.9-star average across 288 reviews, with customer feedback highlighting clear explanations and knowledgeable technicians

Peak Heating and Cooling has a DeKalb service page and offers heating, cooling, electrical, AC installation, furnace installation, HVAC memberships, equipment packages, and financing. The page lists 24-hour service access and multiple offers for full HVAC system replacement.

Peak's service model is more package-driven than many local providers. That may appeal to homeowners comparing AC and furnace replacement together, especially when monthly payment options or warranty packages matter.

• When You Can Reach Them: 24-hour service access is listed on the DeKalb page
• Who's Fixing Your HVAC: HVAC, cooling, heating, and electrical team
• What It May Cost: Financing offers, Peak Club memberships, and equipment packages are promoted
• Local Service Fit: Regional provider with a DeKalb service page
• Customer Confidence: Published review snippets highlight polite, timely service and strong technician performance

All Seasons Heating & Cooling serves Aurora and nearby Fox Valley communities. Its Aurora AC page lists 24/7 emergency service, family ownership, NATE-certified experts, and a Price Match Promise.

The company says it has served Aurora since 1980 and handles AC repair, AC maintenance, AC installation, ductless mini-splits, and thermostat work. That makes it a relevant adjacent-market comparison for DeKalb homeowners looking at providers beyond the immediate local field.

• When You Can Reach Them: 24/7 emergency service
• Who's Fixing Your HVAC: NATE-certified experts
• What It May Cost: Price Match Promise and repair-focused service options
• Local Service Fit: Aurora and Fox Valley provider rather than a DeKalb-centered contractor
• Customer Confidence: Customer reviews on the Aurora service page highlight timely service, thorough repairs, and long-term repeat use

Summers Plumbing Heating & Cooling serves the Yorkville and Aurora area with plumbing, heating, cooling, indoor air, and maintenance services. Its Aurora page lists same-day service, local ownership, background-checked technicians, clear pricing, and emergency heating and cooling support.

Summers is a broader multi-trade provider rather than a DeKalb-specific HVAC company. That makes it a useful comparison for homeowners who want a larger regional service operation with plumbing, heating, and cooling under one roof.

• When You Can Reach Them: 24/7 emergency heating and cooling support
• Who's Fixing Your HVAC: Licensed, trained, and background-checked technicians
• What It May Cost: Clear pricing and satisfaction guarantee language are promoted
• Local Service Fit: Yorkville and Aurora area provider with regional reach
• Customer Confidence: 4.9 stars and 1,180 Google reviews shown on the Aurora page, with review snippets mentioning polite service and clean work

Andersen Plumbing, Heating and AC Repair is an Aurora-based provider offering plumbing, heating, and AC service with 24/7 support. The company positions itself around fast repairs, expert service, and broader home service coverage.

Because Andersen is plumbing-forward rather than HVAC-only, it is not a one-to-one comparison for Edelman's DeKalb HVAC service page. It is still relevant for homeowners comparing broader home service companies in nearby northern Illinois markets.

• When You Can Reach Them: 24/7 support
• Who's Fixing Your HVAC: Plumbing, heating, and AC technicians
• What It May Cost: Service scheduling and fast repair positioning
• Local Service Fit: Aurora-based multi-trade provider, not a DeKalb-centered HVAC contractor
• Customer Confidence: 4.9 stars across 1,800+ reviews in a public listing, with review snippets mentioning trust, professionalism, and quick service