HVAC Service Areas in San Antonio & Austin, TX

San Antonio isn’t one uniform HVAC market. Homes, construction styles and cooling needs can vary considerably depending on where you live, which is why we treat each of our service areas a little differently.

Older homes in established areas such as Alamo Heights, Terrell Hills, Monte Vista and Olmos Park can have very different heating and cooling requirements than newer homes in communities around Stone Oak, Schertz, Cibolo or the rapidly growing Northeast San Antonio corridor.

That’s one reason local experience matters.

Modern Air Systems serves homeowners throughout the San Antonio area with HVAC solutions based on the home, the equipment and the customer’s actual comfort needs—not a one-size-fits-all recommendation.

Looking for an HVAC company in your part of San Antonio? Explore our service areas below, or call either line to confirm we cover your street.

Visit the page for your city:

• North San Antonio HVAC
• New Braunfels HVAC
• San Marcos HVAC
• Austin HVAC
• Round Rock HVAC

Central San Antonio & Nearby Communities

San Antonio, TX
Residential HVAC repair, replacement, installation and maintenance throughout San Antonio.

Alamo Heights, TX
Heating and cooling services for homes in Alamo Heights and nearby neighborhoods.

Terrell Hills, TX
Professional AC and heating services for homeowners throughout Terrell Hills.

Olmos Park, TX
Residential HVAC services for Olmos Park and surrounding central San Antonio communities.

Monte Vista
Heating and cooling solutions for the historic homes and residences of the Monte Vista area.

Tobin Hill
Residential air conditioning and heating services near central San Antonio and Tobin Hill.

North & Northwest San Antonio

Stone Oak
HVAC repair, replacement and maintenance for homes throughout Stone Oak and North San Antonio.

Shavano Park, TX
Residential heating and air conditioning services for Shavano Park homeowners.

Hollywood Park, TX
Local HVAC service for homes in Hollywood Park and nearby North Central San Antonio.

Castle Hills, TX
AC repair, HVAC replacement and heating services throughout Castle Hills.

Leon Valley, TX
Residential HVAC solutions for Leon Valley and surrounding Northwest San Antonio communities.

Northeast San Antonio & Surrounding Communities

Live Oak, TX
Heating and cooling services for homeowners in Live Oak and Northeast San Antonio.

Universal City, TX
Residential AC repair, HVAC replacement and maintenance throughout Universal City.

Converse, TX
Professional residential heating and cooling services for Converse homeowners.

Selma, TX
HVAC service for homes in Selma and communities along the Northeast San Antonio corridor.

Schertz, TX
Residential HVAC repair, installation, replacement and maintenance in Schertz.

Cibolo, TX
Heating and air conditioning services for homeowners throughout Cibolo and the surrounding area.

Other San Antonio Communities We Serve

Modern Air Systems also serves homeowners in and around areas such as Helotes, Balcones Heights, Windcrest, Kirby, Alamo Ranch, Medical Center, Northwest San Antonio, Northeast San Antonio and other nearby communities.

Don’t see your neighborhood listed? Contact Modern Air Systems to find out if your home is within our current service area.

Wherever you live in our San Antonio service area, our goal is the same: dependable home comfort and HVAC solutions that make sense for your home. The same services are available in all of our service areas, from San Antonio to Round Rock.

Air Conditioning Repair

When your AC isn’t cooling properly, is making unusual noises, cycling frequently or has stopped working altogether, our team can diagnose the problem and recommend the appropriate repair.

AC & HVAC Replacement

An aging air conditioner can become increasingly expensive to repair and operate. Modern Air Systems helps San Antonio homeowners determine when repair still makes sense and when replacing the system may be the better long-term investment.

New HVAC Installation

The right HVAC system isn’t simply the biggest unit available. Proper system selection and installation can affect comfort, humidity control, efficiency and equipment life.

We help homeowners choose heating and cooling equipment appropriate for their home and comfort needs.

Heating Services

San Antonio may be known for its heat, but dependable heating still matters when winter temperatures arrive. Modern Air Systems provides residential heating repair, replacement and installation throughout our service area.

Heat Pumps

Heat pumps can provide both heating and cooling from a single system and may be a good option for many South Texas homes.

HVAC Maintenance

Routine HVAC maintenance can help identify developing problems, support efficient operation and prepare your equipment for San Antonio’s demanding cooling season.

Air conditioning in San Antonio isn’t just an occasional convenience. During the hottest parts of the year, cooling systems can operate for many hours every day, across all of our service areas.

That workload makes proper equipment sizing, airflow, installation and maintenance especially important.

San Antonio homeowners also have to consider humidity, indoor air quality and energy use. A home that reaches the thermostat setting can still feel uncomfortable if the HVAC system isn’t managing airflow and moisture effectively.

Our experience with South Texas homes allows us to look at the entire comfort system rather than focusing only on the temperature coming from a vent.

One of the unique things about providing HVAC service in Greater San Antonio is the variety of homes throughout the region. Our service areas include historic central neighborhoods, Hill Country homes and brand-new subdivisions.

Central communities such as Alamo Heights, Terrell Hills, Olmos Park and Monte Vista include many established and older homes where ductwork, insulation, additions and previous HVAC upgrades can affect system performance.

Travel north or northeast toward Stone Oak, Live Oak, Universal City, Schertz and Cibolo, and you’ll find newer neighborhoods with different floor plans, construction methods and HVAC configurations.

Understanding those differences helps us recommend solutions appropriate for the individual home rather than relying on the same approach everywhere.

Every part of our service areas shares the same long, hot Central and South Texas summers, but the homes are not all alike. Here is what our technicians run into most often in each region.

San Antonio and North San Antonio

Many homes on the North Side, around Stone Oak, Timberwood Park and Helotes, are two stories with long duct runs through hot attics. That often leads to an upstairs that never cools down. In older central neighborhoods such as Alamo Heights and Olmos Park, we see aging equipment and ductwork that was added to or changed over the years. In both cases, we check airflow, duct connections and system size before recommending a fix, so you only pay for what solves the problem. Learn more on our North San Antonio page.

New Braunfels and San Marcos

Newer subdivisions along I-35 often have builder-grade systems that struggle during heat waves, while older homes near downtown New Braunfels may need duct or equipment upgrades. Long cooling seasons clog condensate drains, and high indoor humidity can leave homes feeling musty in summer. San Marcos also has a large rental market near Texas State University, so we work with many landlords and property managers there. See our New Braunfels and San Marcos pages for local details.

Austin and Round Rock

Austin summers are long, hot and often humid, so air conditioners run for months with few breaks. That steady demand wears out capacitors, fan motors and contactors and clogs condensate drains. Central Austin mixes older, renovated homes with newer subdivisions, and many Round Rock neighborhoods have original builder-grade systems wearing out at about the same time. Two-story homes with a hot upstairs are common in both. Visit our Austin and Round Rock pages to learn more.

No matter where you live in our service areas, you get the same process from the same family-owned company:

• An honest, repair-first opinion before we recommend anything new
• A written price before any work starts
• A same-day price estimate for system replacement from a photo of your equipment nameplate, confirmed after an in-home or photo-based assessment
• A 1-year labor warranty from us on system replacements, plus the manufacturer’s parts warranty, subject to the manufacturer’s terms
• Financing for qualified homeowners and the Comfort Club maintenance plan

If you are not sure whether we cover your address, call the San Antonio line at (210) 222-0201 or the Austin line at (737) 222-0414 and we will tell you right away.

When you call, it helps to have a few details ready: your address, what the system is doing, roughly how old it is and whether you have a home warranty or a recent quote from another company. For a replacement estimate, a clear photo of the nameplate on your outdoor and indoor units lets us send a same-day price estimate before anyone visits. For repairs, we schedule a technician who diagnoses the problem first and explains it in plain language. That way, whichever of our service areas you are in, you know what to expect before the visit and what it will cost before any work starts.

Most of our work across our service areas is in single-family homes, but we also help two other groups of customers.

Property managers, landlords and real estate investors use us for tenant repair calls, turnover checks between tenants and spring and fall maintenance across many units. We coordinate access with tenants, call for approval before any repair above the limit you set, and send an invoice with notes and photos after every visit. Learn more about our HVAC service for property managers.

Small businesses, offices, restaurants, churches and clinics use us for light commercial HVAC, including rooftop and packaged unit repair, maintenance agreements and replacements planned around business hours. Our sister company, AMG Contractors, is a general contractor, and we bring that same construction standard to every commercial job. See our light commercial HVAC services.

Modern Air Systems brings more than 25 years of HVAC experience to homeowners throughout the San Antonio area. We bring that experience to every one of our service areas.

We believe homeowners should understand what’s happening with their heating and cooling system and have clear information before deciding how to move forward.

Whether we’re troubleshooting an AC problem, maintaining an existing system or helping a homeowner consider HVAC replacement, our focus is on reliable workmanship and long-term home comfort.

From our family to yours, we’re proud to help keep San Antonio comfortable.

Every one of our service areas gets the same licensed team. Modern Air Systems holds Texas ACR contractor license TACLB27872E, which you can verify through the Texas Department of Licensing and Regulation license search.

When you need dependable heating and cooling service in San Antonio or one of the surrounding communities, Modern Air Systems is ready to help. Whichever of our service areas you live in, you get the same family-owned team.

From AC repairs during the hottest days of summer to HVAC replacement, heating service and routine maintenance, our team provides residential HVAC solutions designed around South Texas homes and the people who live in them.

Explore your community above or contact Modern Air Systems to schedule service.