Recent HVAC Installations & Repairs by Our Team
Real work from our own jobs — air conditioning, heating, ductless and commercial HVAC.
AC, furnace and ductless mini-split service for Darien homes and businesses. Licensed, insured, bilingual EN/ES.
When your air conditioner quits on the hottest day of summer or your furnace won't start on a cold Illinois night, Heavy Duty Heating & Cooling responds fast to Darien. We're based nearby in Joliet and treat every Darien home and business with the same care we'd give our own family. Licensed, certified, and bilingual — English and Spanish.
We offer free estimates on new installations, fair pricing with no surprise charges, and 24/7 emergency availability across Darien and the surrounding DuPage County communities.
Darien is a smaller, established DuPage community where many homes date to the 1960s through 1980s. Systems of that vintage are typically well past replacement age, and aging ductwork can leave certain rooms uncomfortable no matter how hard the unit works.
We handle AC and furnace repair and replacement, ductless mini-splits to fix those stubborn hot-and-cold rooms, and fast emergency response. We quote before we start and explain every option clearly.
Serving Darien (60561) in DuPage County from nearby Joliet — same-day and 24/7 emergency HVAC, English or Spanish.
📍 Serving Darien: 60561 · DuPage County — and the wider Joliet area
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 →Based in Joliet, fast response to Darien. Same-day & 24/7 emergency.
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.
★★★★★
5.0 out of 5 · 18 verified Google reviews
Real work from our own jobs — air conditioning, heating, ductless and commercial HVAC.
We're based in nearby Joliet, a short drive from Darien, so we offer same-day and 24/7 emergency response across 60561.
Often the cause is ductwork that can't deliver enough air to that room. A ductless mini-split solves it directly by conditioning that space independently — no major remodeling required.
Yes — free estimates on new system installations for Darien homes and businesses. Call or text (815) 212-7662.
Sí. Brindamos servicio HVAC completo en inglés y español, desde la primera llamada hasta la factura final.
Get a free estimate or schedule service. We respond quickly for Darien-area customers.