Service and Preventive Maintenance

Expert Service Backed by Decades of Experience

Midwest Mechanical Systems provides responsive, professional service and preventive maintenance for complex mechanical systems. Whether it's commercial HVAC, industrial refrigeration, or process equipment, our expert technicians keep your equipment running safely and efficiently — reducing downtime and extending equipment life.

Heating Systems

Boilers (Steam, Hot Water, Electric, Condensing)
Furnaces, Unit Heaters, Radiators, Baseboards
Feedwater Systems & Deaerators
Water Heaters
Electric Duct Heaters & Reheat Coils
Infrared or Radiant Heaters
Hydronic Heating Loops (Chilled & Hot Water)

Cooling Systems

Chillers (Air-Cooled, Water-Cooled, Absorption)
Cooling Towers
Rooftop Units, DOAS Units
Split Systems (Electric Heat, Gas, Heat Pump)
VRV/VRF Systems (Variable Refrigerant)
PTAC & PTHP Units (Packaged Terminal Units)
Air Handling Units (Heating & Cooling, Cooling Only)

Piping & Distribution Systems

Piping Systems (Process, Sanitary, Hydronic, Steam)
Chilled Water, Hot Water, and Chilled Glycol Systems
Steam Distribution and Condensate Return Systems
Pumps for Heating, Cooling, and Process Applications
Glycol Feed and Expansion Systems

Ventilation & Air Movement

Makeup Air Units (Gas, Electric, Refrigerated)
VAV Systems, Energy Recovery
Dust Collection, Scrubbers, Hazardous Exhaust
Supply, Exhaust, Return & Transfer Fans
Terminal Units (VAV, Fan-Powered, Electric Reheat)

Industrial Refrigeration

Ammonia (R-717), CO₂ (R-744), and Freon Systems
DX, Flooded, and Pumped Recirculation Systems
Evaporators, Refrigerated AHUs, Makeup Air Units
Recirculators, Compressors, Gas Coolers, Safety Systems
Oil Management Systems (Separators, Coolers, Pumps)

Specialty Systems

Air Compressors & Dryers
Humidifiers, Dehumidifiers, Economizers
Evaporative-Cooled Devices, Outdoor Air Heat Exchange
Coil Maintenance
Modular Mechanical Skids
Heat Exchangers (Shell & Tube, Plate & Frame)
Controls Integration