HVAC Company in St. Louis County, MO

Honest HVAC Service from a Family-Owned Team Since 1964

We’ve been keeping St. Louis County homes and businesses comfortable for decades. Martin-Jetco Heating and Air Conditioning is a family-owned HVAC company with licensed, NATE-certified technicians and a straightforward commitment: we recommend only what you actually need. No upselling, no unnecessary repairs. Just honest work from a team that’s been part of this community for over six decades.

We serve residential and commercial customers throughout St. Louis County, MO, and same-day service is available when your system can’t wait.

Ready to schedule? Call us today at (636) 205-1631 or book an appointment online.

HVAC Services Available Throughout St. Louis County

We handle the full range of heating and cooling needs for homes and businesses across the county. Whatever your system requires, our NATE-certified technicians can address it.

Heating Services
Our heating work covers furnace installation, repair, and maintenance, along with heat pumps, boilers, radiant floor heating, geothermal systems, and humidifiers. Whether your furnace needs a tune-up or a full replacement, we’ll give you an honest assessment.

Air Conditioning Services
From AC installation and repair to maintenance, replacement, and ductless mini-splits, we keep cooling systems running efficiently through St. Louis County’s hot summers. Emergency HVAC repair is available when you need help fast.

Indoor Air Quality
We install and service air scrubbers, air filtration systems, dehumidifiers, thermostats, and perform air balancing to help maintain a healthier indoor environment year-round.

Commercial HVAC
Our commercial heating and air conditioning services support businesses of all sizes across the county. The same licensed, NATE-certified technicians who handle residential work also serve our commercial accounts.

Why St. Louis County Customers Choose Martin-Jetco Heating and Air Conditioning

Our A+ rating from the Better Business Bureau reflects the standard we hold ourselves to on every job. We’re certified dealers for York, Goodman, Daikin, Carrier, and Trane, giving you access to premium, energy-efficient systems backed by manufacturer warranties. Our trucks are fully stocked, so most jobs are completed in a single visit without scheduling a return trip for parts.

We stand behind our work with a satisfaction guarantee. And because we’re family-owned with multi-generational roots in the St. Louis community, accountability isn’t a policy. It’s how we operate.

The Home Comfort Agreement: Maintenance That Protects Your System

St. Louis County’s hot, humid summers and cold winters put real seasonal demands on HVAC equipment. Our Home Comfort Agreement (HCA) is a twice-yearly maintenance plan designed to help keep your system running reliably before each season begins.

What Each HCA Visit Includes

Every visit covers what your system needs to perform safely and efficiently through the coming season:

• Full system cleaning and inspection
• Refrigerant pressure check
• Voltage and amperage check
• Wiring and thermostat check
• Safety device inspection
• Complete safety inspection of gas, propane, or fuel oil appliances

HCA Member Benefits

In addition to twice-yearly visits, HCA members receive:

• Priority scheduling
• Discounted diagnostic fee on service calls during office hours
• 20% off parts and labor on service repairs (excluding new equipment purchases)
• No overtime fees

Most manufacturers also require documented regular maintenance to honor warranty coverage. The HCA makes it easy to stay current. Learn more about the Home Comfort Agreement.

St. Louis County Communities We Serve

St. Louis County is one of the most populous counties in Missouri, spanning dozens of municipalities and unincorporated areas. Our service area covers the full breadth of the county, including Chesterfield, Ballwin, Kirkwood, Clayton, Brentwood, Webster Groves, Sunset Hills, Manchester, Ladue, Wildwood, Ellisville, Creve Coeur, Frontenac, Oakville, Maryland Heights, Des Peres, and Town and Country.

Not sure whether your community falls within our service area? Call us at (636) 205-1631, and we’ll confirm quickly.

Residential & Commercial HVAC in St. Louis County

We work with homeowners and business owners throughout the county, making Martin-Jetco Heating and Air Conditioning a single-source solution for heating and cooling regardless of property type. Commercial systems operate at larger capacities and under more continuous demand than residential equipment, and our NATE-certified technicians have the experience to handle both.

Whether you manage a single-family home or a commercial facility, you get the same licensed team, the same no-upsell approach, and the same satisfaction guarantee on every visit.

Schedule Your HVAC Service in St. Louis County Today

Same-day service is available for residents and businesses who need prompt attention. If you’re planning a new installation or replacement, financing options are available to help manage the investment.