Fast, reliable heating and cooling service for homes and businesses in Darien. Licensed, insured, bilingual EN/ES. Free estimates.
Whether your air conditioner stops cooling on the hottest day of summer or your furnace won't start on a cold Illinois night, Heavy Duty Heating & Cooling is ready to respond fast. We serve Darien residents and businesses with the same quality and care we'd give our own family. Licensed, certified, and bilingual — English and Spanish.
We offer free estimates, fair pricing with no surprise charges, and 24/7 emergency availability for Darien and surrounding communities in DuPage County, Illinois.
Complete heating and cooling solutions for residential and commercial properties.
Fast diagnosis and repair of all central AC systems. We restore your cool quickly at fair prices.
Learn More →Expert installation of energy-efficient AC systems sized right for your Darien home or business.
Learn More →Gas furnace troubleshooting, repair, and tune-up. Reliable heating through every Illinois winter.
Learn More →High-efficiency furnace installation with proper sizing, ductwork inspection, and full warranty.
Learn More →24/7 emergency heating and cooling response. We answer when you need us most — day or night.
Learn More →Ductless mini-split systems for additions, garages, or any space needing independent climate control.
Learn More →Commercial heating and cooling for businesses, restaurants, offices, and retail. Walk-in cooler service available.
Learn More →Smart thermostat installation, HVAC tune-ups, and preventive maintenance to cut energy bills.
Learn More →Same-day & emergency service in Darien and DuPage County.
Free estimates, no hidden fees, upfront quotes before work begins.
English & Spanish service for all Darien customers.
Fully licensed, certified, and insured HVAC professionals.
Local business treating every Darien customer like a neighbor.
We stand behind every repair and installation.
Based in Joliet — serving Will, Cook & DuPage Counties, IL.
Get a free estimate or schedule service. We respond quickly for Darien area customers.