HVAC Company Serving Des Peres, MO

Replacing a heating or cooling system is one of the larger purchases a homeowner makes, and the hardest part is often getting a clear number before you commit. Family-owned and operated since 1964, Martin-Jetco Heating and Air Conditioning starts with an in-home evaluation from a licensed, NATE-certified technician, honest pricing, and a recommendation you can take time to think over.

We cover every part of home and commercial comfort in Des Peres:

• Air Conditioning
• Heating
• Indoor Air Quality
• Commercial HVAC

We serve homes and businesses throughout Des Peres, from residential areas near Des Peres Park and The Lodge to properties around Manchester Road, Ballas Road, Dougherty Ferry Road, Barrett Station Road, West County Center, and the I-270 corridor. 

Get the right fit for your home, your comfort, and your budget. Call (636) 205-1631 or schedule an in-home evaluation online.

How Much Does HVAC Replacement Cost in Des Peres?

When repair no longer makes sense, replacement in Des Peres generally falls into two ranges:

• Air Conditioner & Evaporator Coil Replacement: Approximately $5,500 to $9,200
• Complete HVAC System Replacement: Approximately $8,450 to $22,990+

Factors that affect HVAC replacement pricing:

• Home square footage
• System tonnage requirements
• SEER2 efficiency rating
• Single-stage vs variable-speed equipment
• Existing ductwork condition
• Zoning systems
• Electrical or code upgrades
• Indoor air quality add-ons
• Accessibility of installation area

For Des Peres homeowners, an air conditioner and evaporator coil replacement typically runs approximately $5,500 to $9,200, while a complete HVAC system replacement generally ranges from approximately $8,450 to $22,990+. The final cost depends on system size, SEER2 efficiency, equipment type, ductwork condition, zoning needs, electrical or code updates, indoor air quality upgrades, and how accessible the equipment is during installation.

Larger custom homes, additions, finished lower levels, and homes with multiple comfort zones can land toward the upper range. An in-home evaluation is the only way to size the system correctly and price the exact work your home calls for.

Want to know what your HVAC project would cost? Get a personalized quote online or call (636) 205-1631.

Reviewing Cost & Savings Before You Commit

A larger project does not have to be paid all at once. Martin-Jetco Heating and Air Conditioning offers financing that turns the cost into predictable monthly payments, files utility rebates on your behalf at installation, and helps you claim federal energy-efficiency tax credits on qualifying equipment. Seasonal coupons can lower the total further. We can walk you through what’s available; just call (636) 205-1631!

During the visit, we also help you compare the cost of replacement against another AC repair or furnace repair, so you can see whether fixing the system still makes sense. We put equipment cost, monthly payment, available savings, and repair-versus-replacement options in front of you before you decide.

How Fast Can We Usually Get There?

Martin-Jetco Heating and Air Conditioning offers same-day and emergency HVAC service, including evenings, weekends, and holidays, so homeowners do not have to wait days for help when the house is too hot, too cold, or uncomfortable. 

Here is what you can generally expect:

• Same-day service is often available for heating and cooling problems. 
• 24/7 emergency appointments are available when comfort or safety cannot wait. 
• Morning calls often get faster appointment windows, sometimes with a technician out that same day. 
• Repair quotes are provided quickly after diagnosis, so the next step does not stall. 
• Many repairs can be completed within 24 to 48 hours, depending on the issue and parts needed.

Response times depend on the schedule, the weather, and the type of repair needed, but many customers who call in the morning are able to get a technician out the same day. In urgent situations, especially during winter cold snaps or summer heat waves, the team works to get someone there as quickly as possible. Call (636) 205-1631 for urgent service.

What an In-Home Evaluation Includes

The quote you get should be based on your actual home, which is why the visit covers more than a quick look at the old unit:

• A room-by-room load calculation that sizes the system to your home as it stands today
• An inspection of the existing ductwork, airflow, and where the equipment sits
• A walk-through of efficiency options (SEER2) and single-stage versus variable-speed equipment
• Upfront pricing for each option, with financing and any rebates spelled out
• Straight answers to your questions, with room to decide on your own timeline

Book an in-home HVAC evaluation online or by calling (636) 205-1631.

Matching System Capacity to a Renovated or Expanded Home

Des Peres has seen steady redevelopment, with older homes expanded, finished out, or replaced by larger new construction, and that brings a recurring set of comfort challenges:

• Larger custom homes often outgrow the capacity a smaller system was originally sized for, especially when square footage has increased over the years.
• Multi-zone comfort systems become necessary when different parts of a larger home, such as bedroom wings, home offices, and main living areas, need to hold different temperatures on their own schedules.
• Home additions, whether a primary suite over the garage or a new wing, change the home's total load and often were not accounted for by the original system.
• Finished lower levels add square footage to heat and cool but can be the last area to receive attention from an undersized or unbalanced system, leaving them noticeably warmer or cooler than the rest of the house.
• Home offices that run computers and equipment generate extra heat in a single room, which can throw off comfort in that space even when the rest of the home feels fine.
• Renovated and expanded floor plans, especially open-concept main floors, change how air moves through a home and can leave a system that was correctly sized for the old layout struggling with the new one.
• Humidity control and indoor air quality become more noticeable in larger homes with finished basements, where humidity tends to linger, and where indoor air quality upgrades like whole-home filtration and dehumidification can make the biggest difference.

Dealing with something similar at home? Set up an AC repair visit online or call (636) 205-1631.

Neighborhoods & Areas We Serve in Des Peres

Martin-Jetco Heating and Air Conditioning serves homeowners and businesses throughout Des Peres, including the 63131 zip code and surrounding West County communities, with extensive experience across the area's neighborhoods.

Service is available near West County Center, Des Peres Park, The Lodge, Phantom Forest, Bittersweet Woods, Dougherty Lake, Pioneer Park, Sugar Creek Park, Harwood Park, and the West County YMCA, as well as near St. Clement of Rome School, Barretts Elementary, Parkway South High School, and Parkway West High School.

The team also serves homes and businesses along Manchester Road, Ballas Road, Dougherty Ferry Road, Barrett Station Road, Des Peres Road, Bopp Road, I-270, and nearby West County corridors.

Actual recommendations depend on the system, the home, and the homeowner’s goals. Every visit starts with a diagnosis, clear options, and room to compare repair, replacement, maintenance, zoning, or indoor air quality improvements.

Why Our Customers Stay with Us for Decades

Martin-Jetco Heating and Air Conditioning has kept St. Louis homes and businesses comfortable since 1964, and the company is still family-owned and operated today. Here is what homeowners can expect from the team:

• More than 60 years of local service helping St. Louis-area homeowners and businesses with heating and cooling. 
• Licensed, NATE-certified technicians on every visit, so your system is handled by trained professionals. 
• Multiple HVAC brand options including York, Goodman, Daikin, Carrier, and Trane. 
• Same-day and emergency service available when heating or cooling cannot wait, including evenings, weekends, and holidays. 
• A track record you can check with more than 1,000 five-star Google reviews, an A+ rating with the Better Business Bureau, six Angie's List Super Service Awards, and recognition as a York Dealer of the Year many years running. 
• No high-pressure sales tactics, just clear recommendations and room to decide at your own pace. 
• Follow-through after the job, with a team that comes back, takes responsibility, and corrects anything that needs a second look.

See for yourself: read over 1,000 5-star Google reviews from St. Louis-area homeowners.

Maintenance That Keeps the System & the Warranty Intact

A new system performs best when it gets regular care. The Martin-Jetco Heating and Air Conditioning Home Comfort Agreement helps keep HVAC maintenance simple with:

• Two seasonal tune-ups each year: one in spring before cooling season and one in fall before heating season. 
• Priority scheduling when you need service. 
• Discounted diagnostic fees on service calls during office hours. 
• 20% off parts and labor on service repairs. 
• No overtime fees for members. 
• Full safety and performance checks during each maintenance visit. 
• Documented maintenance that helps keep the system in good standing with manufacturer warranty requirements.

Let’s get your home comfortable without making the process complicated. Call (636) 205-1631 or reach out online to schedule service.

Frequently Asked Questions

What zip code do you serve in Des Peres? 

Martin-Jetco Heating and Air Conditioning serves all of Des Peres, including the 63131 zip code, along with the surrounding West County communities.

Do I need a larger HVAC system after adding on to my home?

Not always. The right size comes from a load calculation, not the new square footage alone. During the evaluation, our NATE-certified technicians measure the home as it stands now, including additions, finished spaces, insulation, windows, airflow, and ductwork. In some homes, improving zoning or ductwork matters as much as adding capacity.

How much does it cost to replace an HVAC system in Des Peres?

An air conditioner and evaporator coil replacement runs approximately $5,500 to $9,200, while a complete HVAC system replacement runs approximately $8,450 to $22,990+. Home size, system tonnage, SEER2 efficiency rating, equipment type, ductwork condition, zoning needs, electrical or code updates, indoor air quality add-ons, and installation accessibility all affect where the estimate lands.

How much does AC repair cost in Des Peres, MO?

Costs for AC repair in Des Peres span a wide range depending on what has gone wrong. On the lower end are parts like capacitors ($150 to $450), contactors, or thermostats ($100 to $600). Larger repairs, including refrigerant leaks, evaporator coil issues ($600 to $2,000), or a failing compressor, often run well past $1,000. Call (636) 205-1631 and we can walk you through what the repair can cost.

How much does furnace repair cost in Des Peres, MO?

The cost of furnace repair in Des Peres depends on what part has failed and how involved the fix is. As a rough guide, ignitors run $180 to $350, flame sensors $180 to $340, capacitors $150 to $450, and blower motors $500 to $1400+ or more depending on access and motor type. Bigger jobs like a heat exchanger ($2,000 to $4,000) or control board ($700 to $1650) cost considerably more, and at that point furnace replacement may be worth a closer look. Book an in-home evaluation by calling (636) 205-1631.

How long does a new HVAC system last?

A quality system that is properly sized, installed, and maintained typically runs 12 to 15 years, sometimes longer. In Des Peres, homes with larger layouts, multiple zones, finished lower levels, or expanded living areas tend to put more demand on the equipment, which makes regular care even more valuable. Spring AC tune-ups, fall heating inspections, filter changes, clean coils, and addressing small issues early all add up to a longer-lasting system and stronger warranty protection.

Should I repair or replace my air conditioner?

For a newer unit with one isolated problem and a reasonable repair cost, fixing it usually makes sense, especially if the system has otherwise been reliable. Replacement starts to look better once the unit passes the 12 to 15 year mark, still runs on R-22 refrigerant, struggles to control humidity, drives up energy bills, or faces a repair bill that approaches a third of what a new system would cost. Martin-Jetco Heating and Air Conditioning lays out the repair cost, the replacement cost, and what each option means for comfort and long-term value, so the decision is yours to make without pressure.

Why is my AC running but not cooling my Des Peres home?

A system that runs constantly but does not bring the temperature down can point to a dirty air filter, low refrigerant, a frozen evaporator coil, a failing capacitor, a dirty outdoor condenser coil, ductwork issues, a thermostat problem, or simply an aging unit that has fallen behind Missouri's humidity. In larger Des Peres homes with additions, finished lower levels, or multiple zones, the cause is often tied to airflow or sizing rather than the equipment itself.

Why is my furnace blowing cold air?

There are several possible causes: a dirty filter, a thermostat set incorrectly, an ignition or pilot issue, a bad flame sensor, a gas supply problem, a tripped limit switch, or a control board that is not communicating properly with the rest of the system. Sometimes the blower keeps running even though the burners have shut off. Since these issues can involve gas and combustion components, it is worth having Martin-Jetco Heating and Air Conditioning take a look, identify the cause, and confirm the system is safe to keep running.

Are heat pumps effective during Missouri winters?

Modern heat pumps hold up well in Missouri's climate and have become a popular choice because one system handles both heating and cooling. They perform especially well in mild and moderate winter weather, and newer models are built to keep working efficiently even as temperatures drop further than older heat pumps could handle. Some Des Peres homes pair a heat pump with a backup heat source for the coldest stretches of winter. Martin-Jetco Heating and Air Conditioning can look at your home, your goals, and your current setup to see whether a heat pump makes sense.

How often should HVAC maintenance be performed?

Twice a year covers it for most homes: a spring visit for the air conditioning side and a fall visit for the furnace. Staying on that schedule helps catch small issues before they turn into bigger repairs, keeps the system running efficiently, and satisfies the HVAC maintenance requirements most manufacturers attach to their warranties. For larger homes, seasonal visits also give the technician a chance to check that every part of the house is staying comfortable, not just the areas closest to the thermostat.

Do you offer financing for HVAC replacement?

Yes. Martin-Jetco Heating and Air Conditioning offers financing and reviews available Spire rebates, federal energy-efficiency tax credits, and any current seasonal offers with you during the visit, so you can see the full cost picture before deciding.

How quickly can someone come out? 
Same-day and emergency HVAC service are available, including evenings, weekends, and holidays. How fast depends on the schedule, the weather, and what the repair involves. You can call (636) 205-1631 to schedule emergency HVAC repair now.

Need Help Deciding What Your HVAC System Needs in Des Peres?

Whether you are comparing repair versus replacement, pricing a new air conditioner, dealing with an urgent heating or cooling issue, or planning around a renovation or addition, Martin-Jetco Heating and Air Conditioning can help. Call (636) 205-1631 or schedule your in-home evaluation online today.