AC Installation in Castroville, TX
Need a new AC system in Castroville? Honeycomb Heating & Cooling (License TACLA140435E) sizes every installation with a Manual J load calculation rather than a square footage guess. We do this because Alsatian stone walls store heat differently than any other home type in the San Antonio metro area. We offer transparent quotes starting from $10,800, backed by a 5.0-star rating from over 622 Google reviews. Our installations are completed in just one day. Call (726) 233-6044 to get started.
Castroville’s Alsatian limestone and adobe homes, which were built from 1844 to the 1950s along Florella Street and Angelo Street, feature 18 to 24-inch walls that absorb heat all day and release it overnight. This unique architecture forces AC systems to run for 2,800 to 3,200 hours annually. A wrong-sized unit in these homes will short-cycle constantly, drive up Medina Electric Cooperative bills, and fail 40% faster than a correctly sized system. Getting the installation right the first time is not optional here; it is the entire job.

start with a
no pressure visit
We’ll Inspect your system, explain what we see, and let you decide what’s best for your home.
Call Now: (726) 233-6044
REPAIR | INSTALLATION | TUNE-UP: We’ll provide the facts, then you pick the fix that fits your budget.

100% Satisfaction Guarantee
Responsive & Timely Service
Licensed #TACLA140435E

What Is AC Installation in Castroville, TX?
Castroville’s #1 Installation Problem
Wrong-sized systems fighting Alsatian stone thermal mass. A unit sized by square footage in an 1880s limestone home on Florella Street will be 1.5–2 tons undersized because thick masonry stores heat that frame construction sheds by midnight. The system runs continuously through the night, burns out compressors in 6–8 years, and never removes the humidity the Medina River valley adds. Castroville’s demanding 7-month cooling season makes this worse than anywhere else in Medina County.
Castroville’s climate is genuinely demanding, especially since the Medina River valley pushes summer temperatures to over 105°F with elevated humidity from April through October. That kind of thermal load, combined with the heat-storing properties of limestone and adobe construction, quickly exposes undersized, mismatched, or aging systems. A wrong-sized unit will short-cycle constantly, drive up MEC bills, and fail prematurely. Getting the installation right the first time in this environment means starting with actual load data rather than a generic chart.
Our team specializes in right-sizing Amana and Goodman systems for Castroville’s distinct property types. The Alsatian stone homes built from the 1800s to the 1950s along Florella Street and Angelo Street need a different tonnage than the mid-century ranch homes located on the US-90 corridor. Furthermore, newer east-side subdivisions require a thorough duct assessment alongside the new unit, because skipping that step creates system callbacks within two seasons. Every Honeycomb installation in Castroville starts with a precise load calculation to eliminate guesswork entirely. Learn more about common AC installation mistakes that waste energy.
How Our AC Installation Process Works in Castroville
A reliable AC installation follows a clear process from start to finish. Here’s what to expect when you schedule with Honeycomb in Castroville.
1. Schedule a Free In-Home Estimate
Call (726) 233-6044 or submit a request online. Omar Castilleja or one of our certified technicians will visit your Castroville home within one to two business days at no cost and with no obligation. Castroville is approximately 35 minutes from our Highway 281 North office via US-90 Direct, allowing us to offer same-day visits for urgent situations.
2. Alsatian Stone Home Assessment & Manual J Load Calculation
Our technician performs a Manual J load calculation, which is the only accurate way to size an AC system in Castroville’s environment. For Alsatian stone and adobe homes along Florella Street, this means evaluating limestone wall thermal mass, upper-floor heat retention (which is typically 8 to 12°F hotter than lower floors), and the insulation condition inside stone walls. We also evaluate sun exposure on south-facing masonry and the original ductwork sizing. For US-90 ranch properties, we additionally assess caliche dust and agricultural particulate exposure on the condenser site, which is a factor that does not exist in urban San Antonio installations. Ultimately, we size the system for your specific home rather than relying on a Medina County average.
3. System Selection & Transparent Quote
We present Amana and Goodman options with a clear price for each, starting from $10,800 depending on tonnage and efficiency rating. There are no hidden fees and no hourly charges, ensuring you choose what fits your home and budget before any work begins. We will also check your Castroville home’s eligibility for Medina Electric Cooperative (MEC) energy efficiency rebates on qualifying systems, and we will handle all the AHRI certification paperwork so you leave nothing on the table.
4. Scheduled Installation Day
Our licensed technicians, including Sergio Alfaro, Angel Alfaro, and Gil Mompaz, arrive on time to remove your old unit and install the new system. We protect your Castroville home throughout the process and keep the work area clean. Most Castroville residential installations are completed within four to eight hours, ensuring you are cooling by evening. For Alsatian stone homes with access constraints or original ductwork that needs modification, we communicate timeline adjustments upfront before the installation day begins.
5. System Testing & MEC Rebate Walkthrough
Before we leave, we run a full system test across every zone to confirm peak performance against Castroville’s Medina River valley heat load. We walk you through thermostat operation, filter schedules, and Medina Electric Cooperative (MEC) SaveNow rebate paperwork on qualifying high-efficiency systems so you leave nothing on the table. Learn how to save 15% or more on your cooling costs after installation.
6. Post-Installation Support & The Comfy Club
Our team is always available for follow-up questions. Comfy Club members receive priority scheduling and a 15% discount on all future repairs, which keeps your Castroville AC running efficiently through summers over 105°F for years to come. In a county where your system runs seven to eight months a year fighting Alsatian stone thermal mass, this level of maintenance is not optional; it is a smart investment.
Transparent Pricing
Heat Pump
Full System Installation
✓ Single Stage – $10,800 – $18,000
Reliable, standard efficiency for Castroville’s 7-month cooling season. Most popular for Alsatian stone homes and US-90 ranch properties.
✓ Two Stage – $14,200 – $21,100
Variable capacity systems offer precise Medina River valley humidity control, which effectively addresses the continuous-run problem commonly found in limestone homes.
✓ Variable/Inverter – Ask for a Quote
Maximum efficiency. Best for Alsatian stone homes with significant thermal mass and multi-floor temperature variance history.
Gas Furnace
Full System Installation
✓ Single Stage – Ask for a Quote
Classic reliability for Castroville’s cold snaps.
✓ Two Stage – Ask for a Quote
Optimized airflow for Castroville’s larger ranch and adobe homes.
✓ Variable/Inverter – Ask for a Quote
Ultra-efficient gas heating for historic Castroville properties.
Straight Cool
Full System Installation
✓ Single Stage – Ask for a Quote
Budget-friendly cooling for Castroville homes prioritizing simple efficiency.
✓ Two Stage – Ask for a Quote
These advanced systems provide better dehumidification, which is especially valuable during the Medina River valley’s humid shoulder seasons.
✓ Variable/Inverter – Ask for a Quote
Our highly efficient systems deliver the lowest MEC monthly bills, making them ideal for homes with a high thermal mass that drives extended system runtime.

aFFORDABLE Pricing. Experienced Team.
Why Castroville Homeowners Choose Honeycomb
They’re Your Neighbors, Not a Franchise
Omar Castilleja and Brandon Caputo founded Honeycomb right here in San Antonio rather than running it from a corporate office located in another state. They proudly serve Castroville and Medina County because they believe these homeowners deserve truly honest service. A perfect 5.0-star rating from over 622 Google reviews submitted by real local homeowners backs that up.
You Know the Price Before They Arrive
Every AC installation is transparent written in advance, zero hourly charges. No one starts work until you’ve approved the number. That’s the “no pressure” promise, not just a tagline.
Sized for Alsatian Stone, Not a Textbook
Castroville’s summers over 105°F and unique home stock, which includes 1800s limestone homes on Florella Street, adobe builds on Angelo Street, and ranch homes on the US-90 corridor, demand precise system sizing. Honeycomb uses Manual J load calculations on every job because a wrong-sized unit will short-cycle, cause humidity problems, and fail faster in this climate than anywhere else in Medina County. We have seen the callbacks that result from guesswork, and we simply do not use it. Read our guide to the top 10 best AC installation practices.
Credentials That Are Verifiable
License #TACLA140435E. A-Rated Accredited BBB. Amana and Goodman certified installations. These aren’t claims they’re checkable facts.
Support That Doesn’t Stop at Installation
The Comfy Club maintenance plan keeps your system running at peak efficiency, offering members priority scheduling and a 15% discount on all future repairs. In a county where your AC runs for more than seven months a year against Alsatian stone thermal mass, this level of care is not optional; it is a smart investment.
Schedule Service
Schedule an AC Installation in Castroville
If you’re ready to replace your current system or install AC in a Castroville home for the first time, Honeycomb Heating & Cooling is available to help. We provide no-pressure estimates and transparent pricing on all AC installations in Castroville, TX.
We serve neighborhoods across Castroville and Medina County from historic Alsatian stone homes along Florella and Angelo Streets, to ranch properties on the US-90 corridor, to the east-side subdivisions near Castroville Regional Park. Aaron Botts specifically serves the Castroville and Medina County area and is familiar with the routing and home types throughout the region.
Most estimates can be scheduled within 1–2 business days. Same-day service is also available for urgent situations.
Transparent pricing · Written quote before work begins · MEC rebate paperwork handled · Alsatian stone home expertise

What Our Customers Say
“Great company. Got the work done quickly and neatly. Angel and Sergio were super helpful and kind. They did amazing work. Thank you for the great service guys!”
Thank you Honeycomb for being a family oriented business and really gearing towards taking care of your customers! You have definitely made an impact in my experience that I will receive your very best every single time! Again Aaron B. heard my concerns and took care of our A/C unit with additional safety precautions to feel more secure!
Selena Jasso
“Armando and Aaron, are extremely courteous, and friendly. Showed up on time, informed us of the steps, and the job to their best, explained me the issues, and the solutions. Documented all the work. Would highly recommend.”
Deals & Specials
Free Nuve Thermostat with Install
Control your home temperature from anywhere. Can’t be combined with other offers.
Get a Free Air Scrubber with Install
Enjoy fresher air throughout your entire home! Can’t be combined with other offers.
Zero Interest with No Monthly Payment
Call for more details. Can’t be combined with other offers.
Castroville & Medina County Neighborhoods We Serve
Honeycomb provides AC installation services across Castroville and surrounding communities. Below are the neighborhoods we regularly serve each with their own home type, construction challenge, and sizing requirements.
- Historic Alsatian District, Florella & Angelo Streets (78009) – Primary service area. Aaron Botts specifically serves this zip. Mix of 1844–1950s limestone and adobe homes where Manual J and ductwork assessment before any install is mandatory.
- US-90 Corridor Ranch Properties– Mid-century ranch homes and working ranch properties where agricultural dust and caliche exposure demand condenser placement planning and heavy-duty filtration sizing.
- East Castroville Subdivisions – Newer 1990s–2000s residential builds where correct system sizing prevents the premature failures common in Medina County’s 7-month cooling season with high solar gain.
- Medina River Corridor Properties – Riverside homes where humidity is highest and condensate drain capacity must be sized to handle peak Medina valley moisture loads in June and July.
- Surrounding Medina County – Hondo (78861) · D’Hanis (78850) · Lytle (78052) · Natalia (78059) · Devine (78016) same service, no distance fees.
Don’t see your neighborhood? We serve every zip code in Medina County, call (726) 233-6044 to confirm same-day estimate availability.

Ac Installation FAQ San Antonio
How long does an AC installation take in a Castroville Alsatian stone home?
Most Castroville residential AC installations take 4–8 hours from removal of the old unit to final system testing. Alsatian stone and adobe homes along Florella Street may run longer if original ductwork inside stone walls needs assessment or modification, we identify this during the estimate visit, not on installation day. Newer ranch homes on the US-90 corridor and east-side subdivisions typically complete in the standard 4–6 hour window. Omar Castilleja and the Honeycomb team handle sizing, installation, testing, and cleanup in a single visit, you’re cooling the same day. Call (726) 233-6044 to schedule.
How much does AC installation cost in Castroville, TX?
AC installation in Castroville runs from $10,800 depending on tonnage, efficiency rating, and whether ductwork needs evaluation common in older Alsatian stone homes along Florella and Angelo Streets where original 1960s–1980s retrofit ductwork is undersized for modern loads. Single-stage heat pump: $10,800–$18,000. Two-stage: $14,200–$21,100. Honeycomb provides transparent written quotes before any work begins, zero hourly charges. Most estimates scheduled within 1–2 business days. Call (726) 233-6044.
Why do Castroville’s Alsatian stone homes need a Manual J calculation instead of square footage sizing?
Proper sizing in Castroville requires a Manual J load calculation rather than a generic square footage estimate, because Alsatian limestone and adobe walls averaging 18 to 24 inches thick behave completely differently from modern frame construction. A 1,500-square-foot stone home on Florella Street stores two to three times more heat than a 1,500-square-foot insulated-frame home, requiring significantly higher tonnage to maintain its setpoint overnight. Consequently, an undersized system in a Castroville stone home will run continuously, burn out the compressor 40% to 50% faster, and still fail to maintain 75°F at 2 AM in July. Honeycomb never installs systems based on square footage rules of thumb in Medina County stone construction.
Are there energy efficiency rebates for new AC systems in Castroville?
Yes. Castroville homeowners can get cash back through the Medina Electric Cooperative (MEC) SaveNow program when upgrading to qualifying high-efficiency systems. MEC is Castroville’s utility provider, unlike CPS Energy, which serves San Antonio. Rebate amounts depend on the SEER2 rating and system type; qualifying high-efficiency replacements receive meaningful rebates that reduce your out-of-pocket installation cost. Honeycomb handles all AHRI certification and MEC rebate paperwork as part of every installation, ensuring you leave nothing on the table. Ask about these savings when you call, and we will confirm exactly what your specific Castroville home qualifies for.
Does US-90 caliche and agricultural dust affect where my outdoor AC unit should be placed?
Yes, and this is a factor most HVAC companies don’t assess in Castroville. The US-90 corridor generates year-round caliche dust and agricultural particulate from farm operations. Condenser coils on poorly-placed outdoor units near working ranch properties or road exposure pack with dust 30–40% faster than urban San Antonio locations, reducing efficiency by 20–30% and dramatically increasing compressor wear. During the estimate visit, Honeycomb assesses condenser placement specifically for dust exposure, we recommend shielded locations, appropriate clearances, and coil guard options before installation. This is part of sizing for your property, not an add-on conversation later.
Do you remove my old AC system during installation in Castroville?
Yes, removal and disposal are included in every Honeycomb installation. We handle old R-22 refrigerant systems, oversized units, and aging ductwork common in Castroville’s older Alsatian stone and adobe neighborhoods according to Texas disposal regulations. For stone homes with original ductwork retrofitted into masonry walls, we document condition before removal and photograph all work. No extra charges, no hauling fees. Your property is left clean and your new system is running before we leave.
Why does my San Antonio home feel humid after a new AC installation?
Warmth after a new installation in Castroville almost always signals one of two issues: an undersized system that cannot overcome Alsatian stone thermal mass releasing stored daytime heat overnight, or disconnected and undersized ductwork inside stone walls that restricts airflow to upper floors. Both of these problems are completely avoided by starting with a Manual J load calculation and a thorough ductwork inspection before the installation begins. Because Castroville’s diverse home stock, which includes 1800s limestone homes on Florella Street, mid-century ranches on US-90, and newer subdivisions on the east side, all require different tonnage, distinct duct configurations, and specialized zoning, Honeycomb never installs systems based on square footage rules of thumb.
What SEER2 rating makes sense for a Castroville home running 7 months of cooling season?
For Castroville’s climate, where systems run between 2,800 and 3,200 hours annually from April through October, we recommend a minimum SEER2 rating of 15 to 16. High-efficiency systems with a SEER2 rating of 18 to 20 or higher deliver significant MEC bill savings in Castroville. This is specifically because the extended seven-month cooling season means every efficiency point compounds across thousands of runtime hours. For Alsatian stone homes where the building itself drives extended overnight operation, variable-speed systems with a SEER2 rating of 20 or higher provide the best combination of efficiency and humidity control. The Amana and Goodman units that Honeycomb installs offer SEER2 ratings up to 20 or higher.
“Honeycomb Heating & Cooling (TACLA140435E) is a San Antonio-based, locally owned HVAC company. We are not affiliated with Honeywell or any national brand.“


