HVAC Service & Maintenance

We are the local HVAC service experts. Each one of our heating and air conditioning maintenance teams in Louisville, KY, O’Fallon, MO, Columbia, MO, and Springdale, AR want to give you the maximum return on the investment in your commercial heating and air conditioning system. From our offices in O’Fallon, MO, Columbia, MO, Louisville, KY and Springdale, AR,  we offer HVAC Service & Maintenance plans that are proactive, which allows us to keep your systems performing at peak efficiency for twice as long as normal.

What we cover

HVAC Preventative Maintenance

We’ve changed the service model for preventive maintenance by removing owner risk and contractor rewards for failure.

HVAC Emergency Repair

When your HVAC systems break down, you need a company you can count on to be responsive no matter what time of day.

HVAC Energy Optimization

We keep systems running longer and performing more efficiently. That means we keep parts out of the landfill while ensuring they use less energy.

Missouri & Kentucky HVAC Repair, Installation, Service & Maintenance

Why QuesTec?

We’ve removed the conflicts of interest that happen with regular maintenance plans from other HVAC service companies in Louisville, KY, St. Louis, O'Fallon and Columbia, MO.

Missouri & Kentucky HVAC Repair, Installation, Service & Maintenance

How We Work

We compare your current HVAC service and maintenance costs and create plans that maintain your home heating and air conditioner systems running longer and for less.

Find Out More

Mechanical Contracting or Service & Maintenance — tell us what you need and we’ll create a plan just for you!