RTU-01System 1 of 9
Rooftop units
Packaged rooftop units carry most of the heating and cooling for retail, office and light-industrial buildings in the northwest suburbs. We troubleshoot them, repair them, replace them when the numbers say so, and coordinate the crane, curb and controls work that a change-out involves.
Request rooftop units service- No-cool and no-heat troubleshooting
- Compressors, fans, burners and controls
- Economizer repair and setup
- Replacement and crane lifts
- Curb adapters and roof coordination
AHU-02System 2 of 9
Air handlers & ventilation
Built-up and packaged air handlers move the air in offices, schools, labs and plants. We service fans, belts, bearings, coils, dampers and the controls that run them, and we find out why a unit that looks fine on paper isn’t delivering.
Request air handlers & ventilation service- Air handling unit troubleshooting
- Coil cleaning and filter replacement
- Damper and actuator repair
- Outside-air and ventilation problems
- Industrial HVAC systems
B-03System 3 of 9
Boilers & hydronic heat
When a Chicago-area boiler fails in January, everything downstream freezes with it. We troubleshoot commercial boilers and the pumps, valves and controls of the hydronic loop, explain what failed and why, and lay out repair and replacement options in plain numbers.
Request boilers & hydronic heat service- Boiler troubleshooting and repair
- Burner and ignition faults
- Pumps, valves and hydronic controls
- Boiler replacement planning
- Winter freeze-protection checks
CH-04System 4 of 9
Chillers
A chiller is the single most expensive piece of mechanical equipment in many buildings, and the one that hurts most when it trips on the hottest afternoon of July. We troubleshoot chillers and the systems around them and tell you plainly whether you’re looking at a repair, an overhaul or a plan to replace.
Request chillers service- Chiller troubleshooting
- Alarm and trip diagnosis
- Seasonal start-up and shutdown
- Condenser and evaporator coil care
- Replacement planning
R-05System 5 of 9
Commercial refrigeration
The R in HVAC-R. Refrigeration failures cost product, not just comfort, so we treat a warm walk-in as the urgent call it is: find the fault, fix it right, and keep the refrigerant records the federal rules expect.
Request commercial refrigeration service- Refrigeration system troubleshooting
- Walk-in coolers and freezers
- Icing, defrost and drain problems
- Leak search and repair
- Refrigerant recordkeeping
EF-06System 6 of 9
Kitchen exhaust & make-up air
Restaurants and institutional kitchens live or die by their exhaust and make-up air. When the hood won’t pull, the dining room fills with smoke or the doors are hard to open, it’s almost always a fan, a belt, a make-up air unit or the balance between them. We troubleshoot the whole system.
Request kitchen exhaust & make-up air service- Kitchen exhaust system troubleshooting
- Exhaust fan and belt service
- Make-up air units
- Building pressure problems
BAS-07System 7 of 9
Building automation, VAV & BACnet
A good mechanical system with bad controls still produces hot offices and cold conference rooms. We retrofit and repair VAV boxes, chase down the zones that never satisfy, and integrate equipment over BACnet so your building automation system can actually see and run it.
Request building automation, vav & bacnet service- VAV retrofit
- VAV troubleshooting and repair
- BACnet integration
- Hot and cold zone complaints
- Coordination with your BAS contractor
PM-08System 8 of 9
Preventive maintenance
Planned maintenance is cheaper than emergency calls, and it gives you something better than a checkbox: a detailed report with every PM performed, so you know what we found, what we fixed and what to budget for next.
Request preventive maintenance service- Facility maintenance plans
- Coil cleaning
- Filter replacement
- A detailed report with every PM
- Seasonal heating and cooling checks
MD-09System 9 of 9
Mechanical design & installation
From a tenant build-out to a new building, we design and install mechanically efficient systems with a strong focus on building codes, energy efficiency and long-term sustainability, and we work alongside the BAS, electrical, plumbing, carpentry and test-and-balance teams to finish clean.
Request mechanical design & installation service- Commercial HVAC mechanical design
- New equipment installation
- Tenant improvements and build-outs
- Code and energy-efficiency focus
- Trade coordination through test and balance
DXDiagnosis first
A clear explanation before any work.
“After diagnosis, we provide clear explanations and effective solutions tailored to your needs.” You get the cause, the options for repair or replacement and the cost, in plain words, so the decision is yours.
!Safety
Gas, CO or no heat? Here’s the order.
If you smell gas, leave the building, don’t touch switches and call the gas utility or 911 from outside. If a CO alarm sounds, get everyone out and call 911. If the heat is out in freezing weather, call 630-439-5958, and never use ovens or grills indoors for heat.
