Heavy Duty Heating & Cooling • Serving Mokena, IL • (815) 212-7662
Commercial HVAC & Rooftop Units in Mokena, IL
When a rooftop unit goes down in July, the whole building knows within the hour. We repair, maintain and replace packaged RTUs for Mokena businesses — plus walk-in coolers and freezers for food service, a specialty most local HVAC companies do not carry. Based in Joliet, 20 minutes west on I-80.
Family-owned HVAC — City of Joliet H&V License #84735 • EPA 608 Universal.
☎ (815) 212-7662
heavydutyheatingandcooling@gmail.com
Joliet, IL • Will, Cook & DuPage Counties
Our Actual Rooftop Work
This Is What Our Tuesdays Look Like
These flat-roof photos are from our real service calls — multiple packaged units diagnosed, repaired and maintained on-site. Commercial rooftops are not a sideline for us; they are the core of our commercial book.
Drive LaGrange Road or 191st Street and look up: nearly every retail strip, office plaza and light-industrial building in Mokena is conditioned by packaged rooftop units. They are workhorses — and they are also the most neglected equipment in commercial real estate, because nobody sees them until the calls start coming from tenants.
Our commercial work follows a simple discipline. Diagnose on the roof with instruments, photograph what we find, and give the owner or property manager two numbers when repair is questionable: the cost to fix it now, and the realistic cost of ownership over the next three years. An RTU at end-of-life eats repair money quietly; when replacement genuinely wins, we say so with math, not pressure.
And because our shop also does commercial refrigeration, food-service clients get one contractor for both sides: the rooftop unit over the dining room and the walk-in cooler behind the kitchen.
Capabilities
What We Handle for Mokena Businesses
RTU Repair
Compressors, blower motors, capacitors, contactors, refrigerant leaks, ignition and airflow faults — diagnosed on the roof, explained in plain language with photos.
RTU Preventive Maintenance
Scheduled filter, coil, belt and electrical checks planned around your business hours — the cheapest insurance a commercial roof can buy.
Walk-in Coolers & Freezers
Our specialty. A failed walk-in is an inventory emergency; we diagnose compressors, controls and refrigerant fast.
Full RTU Replacement
End-of-life units swapped with crane coordination, curb adapters and startup documentation.
Split Systems & Server Rooms
Dedicated cooling for server closets and zones needing independent control.
Property Management Support
Per-job photo documentation, honest repair-vs-replace calls, one contact who answers — in English or Spanish.
Field Proof
From Our Commercial Service Calls
Every photo below is our own work — real roofs, real repairs.
Multiple rooftop units on a commercial flat roof — our service callCommercial blower assembly opened for repair — diagnosed on-siteCompressor electrical repair on a commercial condensing unit
The Specialty Nobody Else Around Here Wants: Walk-Ins
Restaurants and food-service operations in the Mokena area have few options when a walk-in cooler or freezer fails — most HVAC shops simply do not touch refrigeration. We do, with EPA 608 Universal certification and emergency response to protect your inventory.
“My AC went out on a Sunday that was also a holiday. I was cringing at the thought of the bill I was going to get. Not only were these guys onsite in an hour, the price was exceptionally reasonable.”
— Elizabeth S
Google review
★★★★★
“Great customer service.”
— Jose Vargas
Google review
FAQ
Frequently Asked Questions
Do you service rooftop units (RTUs) in Mokena?
Yes — packaged rooftop units are the core of our commercial work: diagnostics, compressor and blower repairs, refrigerant work and preventive maintenance. The rooftop photos on this page are from our real jobs.
Can you handle walk-in coolers and freezers?
Yes, and few HVAC companies in the area do. Walk-ins for restaurants and food service are one of our specialties — including emergency response to protect inventory.
Do you offer maintenance contracts in Mokena?
We offer scheduled preventive maintenance — filters, coils, belts, refrigerant and electrical checks — planned around your business hours. Ask for a per-unit quote.
How fast can you get to Mokena?
Our shop is in Joliet, about 14 miles from Mokena via I-80 — a normal service run, with emergency calls available.
Do you work with property managers?
Yes. Clear per-job communication, photos of completed work, and honest repair-vs-replace recommendations across Will and Cook Counties.
Service Area
Down I-80 to Mokena — Commercial Calls Answered
Our Joliet shop sits 14 miles west of Mokena on the I-80 corridor. We cover the LaGrange Road and 191st Street commercial strips plus the industrial parks between Mokena, New Lenox and Frankfort — with emergency response for walk-in coolers.
