Condominium Maintenane & Repairs Residential & Maintenance Repairs

HVAC Installation & Repair

Marciante Diversified has been serving the St. Louis Metro Area, Jefferson County and surrounding areas since 1984. We provide our customers with service to meet all of their heating and cooling system needs.

With the ever-changing climate, we know that it is a necessity for your heating and cooling systems to be operating properly. Our EPA certified technicians service Residential HVAC, Furnaces, Boilers, Heat Pumps, and Central Air. We have been helping protect your investment for over 30 years with licensed, bonded, and fully insured craftsmen.

Water Heaters

Gas Water Heaters
Electric Water Heaters
Tankless Water Heaters
Solar Water Heaters
Heat Pump Water Heaters

Heating & Cooling Systems

Air Conditioners
Heat Pumps
Gas Furnaces
Electric Air Handlers
Oil Furnaces
Cooling Coils
Indoor Air Quality
Package Units

Commercial HVAC Products

Package Gas/Electric
Package A/C
Package Heat Pumps
Split-System Condensing Units
Split-System Heat Pumps
Air Handlers

Mechanical Maintenance & Repair Services

Air Conditioner and Heat Pump Service and Repair
Gas Furnaces and Electric Heater Service and Repair
Mini-Split Systems
Humidifiers (Fully Powered and Steam)​
Electronic Air Cleaners

Media Filters
Digital Thermostats
Smart Phone Accessible Climate Control
Zoning Controls for Hot and Cold Areas
Gas Line Leak Detection and Repair
Fireplace Log Sets
Duct Cleaning & Clean-Air Packages

If you are experiencing a true emergency & need assistance right away, call us – 24/7