Furnace & heating
AC repair
Heat pumps
Ductless mini splits
Trane
GoodmanSeasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateFast, Reliable AC Installation Across Castle Hills
AC installation in Castle Hills typically runs $3,500 – $7,500 depending on system size, efficiency tier, and whether your home needs ductwork modifications. Most full-system replacements in Castle Hills take one to two days, and the biggest variable is whether your existing ducts can handle the new equipment. Halden Heating and Air San Antonio answers the phone 24/7, sends a background-checked tech with a live arrival time, and puts your price in writing before any work begins. Call (903) 623-6784 for a free estimate.
Castle Hills is a city within a city, which means the rules here are not the same as San Antonio’s. We know the permitting office, the inspection quirks, and the housing stock well enough to spot problems before they become change orders.
Why Halden Heating and Air San Antonio Is Castle Hills’s Preferred AC Installation Company
We are not the cheapest HVAC company in Bexar County, and we do not try to be. What we do for Castle Hills homeowners is straightforward: a written price before work starts, a written guarantee on every job, and a tech you can track to your door. No four-hour windows. No door-step price changes. No voicemail at midnight when the system dies.
Andre Fuller leads the team that handles Castle Hills installations. He has made the 365-Day Done Right Promise the operating standard: if the job is not done right, we make it right, with a full year of accountability on the completed work. Every repair includes a free second visit if it fails within the coverage window. That is not an upgrade. It is the default.
Because Castle Hills has its own code enforcement, a contractor who mostly works San Antonio jobs can walk into a permit problem they did not know existed. Our crew pulls Castle Hills permits regularly. We know what the local inspectors look for, and we correct issues before the inspection, not after.
We are part of the Relay Home Co. network and held to The Relay Visibility Guarantee on every job, which means you see who is coming, when they will arrive, and what the work costs before a tool comes off the truck. Dispatch for Castle Hills is coordinated from the brand’s Dallas-Fort Worth office, with local crews serving Castle Hills directly.
Styles & brands we work with
Heat Pump Installation in Castle Hills
Heat Pump Installation in Castle Hills is the smart play for larger mid-century and custom homes that currently run a furnace plus a separate AC condenser. A heat pump replaces both with one outdoor unit that heats in winter and cools in summer, which means one system to maintain and one failure point instead of two. In Castle Hills, where summers hit 95°F with high humidity and winters dip below freezing a few nights a year, a modern cold-climate heat pump covers both seasons without a gas furnace as backup. Plan on $3,500 – $7,500 for a full heat pump installation, including the air handler and any refrigerant line work.
What a Castle Hills heat pump retrofit actually involves
Castle Hills homes built in the 1950s through the 1980s often have ducts that were sized for a furnace blower, not a heat pump’s lower static pressure requirements. Before we install, we measure static pressure and return air capacity. If the ductwork is restrictive, we correct it as part of the job rather than leaving you with a noisy blower and an efficiency rating that never shows up on the CPS Energy bill.
Why two-stage matters in this climate
Castle Hills humidity is the quiet enemy of comfort. A single-stage heat pump blasts cold air and shuts off, which leaves moisture hanging in the air. A two-stage unit runs longer at a lower speed, pulling more humidity out of the house. For the larger custom homes around Castle Hills, we often recommend a two-stage unit paired with a zoning damper system so the master suite and living areas cool evenly instead of competing for the same airflow.
Ductless Mini Split Installation in Castle Hills
Ductless Mini Split Installation in Castle Hills solves a specific problem: rooms in older mid-century ranch homes with no ductwork or undersized return air, like a converted garage, a sunroom, or an upstairs addition that never gets cool. A mini split mounts a small indoor unit on the wall, connected to an outdoor condenser by a narrow line set, so you get real cooling and heating in a room without replacing the whole duct system. Full ductless mini split installation in Castle Hills runs $3,500 – $7,500 depending on the number of indoor heads.
Where we put them locally
We have installed dozens of mini splits in Castle Hills homes with the original 1950s ductwork still in place. Rather than tear apart ceilings to add duct runs to a far bedroom, a single ductless head gives that room its own thermostat and its own airflow. For homeowners adding a home office or a gym to a garage, a mini split is the lowest-cost path to year-round comfort.
The brand and warranty stack
We lean on Daikin and Bryant for Castle Hills mini splits because of the parts availability and the manufacturer warranties, and because both brands have strong high-humidity performance. Every install carries our written guarantee and the 365-Day Done Right Promise, so if the system does not deliver the cooling it promised, you call one number and we come back.
Trusted Brands We Service in Castle Hills
Halden Heating and Air San Antonio is certified to service and install Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Castle Hills installations specifically, we keep Bryant, Carrier, and American Standard units stocked at the warehouse, which means faster turnaround when your system fails in July and you do not want to wait a week for equipment. We do not play favorites: the right system for your house depends on your square footage, ductwork condition, and budget, not on what we happen to have a rebate on that month.
See the difference
Before
After
Before
After
Before
AfterCommon AC Installation Problems We See in Castle Hills Homes
- Undersized return air ducts from the original build. Many Castle Hills ranch homes went up in the 1950s and 1960s with return air sized for a much smaller heat load. A high-efficiency system installed on those ducts will pull a vacuum, make noise, and fail to deliver rated SEER2. We check static pressure before we quote, not after we install.
- Castle Hills permit office rejections on San Antonio-compliant work. Castle Hills runs its own code enforcement, and a job that passes across the city line can be flagged here for documentation, load calculation, or equipment placement. We pull Castle Hills permits weekly and know the local inspector’s expectations.
- Multi-zone damper systems that never get balanced. Larger custom homes in Castle Hills often get zoning added, but if the dampers and airflow are not commissioned with a final balance report, the master suite stays warm all afternoon. We commission every zoned install with airflow and temperature readings per zone before we leave.
- Humidity that keeps the house feeling hot even at 72°F. Castle Hills summers are muggy, and a system sized only for temperature will leave you with cold, damp air. We size equipment for the humidity load, not just the temperature, which usually means a slightly different tonnage and blower speed setting than a generic San Antonio installer would choose.
Pricing for AC Installation in Castle Hills, TX
A typical AC installation in Castle Hills runs $3,500 – $7,500. That range covers most single-family homes here, from a straightforward 3-ton replacement in a ranch house to a larger zoned system with duct modifications. The price is driven by system tonnage, efficiency tier, ductwork condition, and whether you are adding zoning or a second return.
| Service | Price Range in Castle Hills |
|---|---|
| AC Installation | $3,500 – $7,500 |
| Heat Pump Installation | $3,500 – $7,500 |
| Ductless Mini Split Installation | $3,500 – $7,500 |
We give every Castle Hills customer a written fixed price before any work begins. No estimate that turns into a surprise on the day of install. And if the system underperforms after the first summer, the written guarantee covers a return visit. Call (903) 623-6784 to get Castle Hills-specific pricing for your home. Estimates are free.
We Also Serve Cities Near Castle Hills
Our AC Installation crews cover Castle Hills and the surrounding Bexar County communities. We also run installs in San Antonio, Universal City, Timberwood Park, and Leon Valley. If you are in Castle Hills or just outside the city limits, call and we will tell you straight whether your job is in our normal service area and when we can get there.
Serving Castle Hills, TX - Our Local Coverage Area
We’re based in the Castle Hills area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About AC Installation in Castle Hills
Castle Hills requires its own permit. The city runs a separate permitting and inspection office from Bexar County and San Antonio, so an AC installation inside Castle Hills city limits must be filed with the Castle Hills building department, not San Antonio’s. A contractor who only works San Antonio jobs may not know that until the job is flagged. We pull Castle Hills permits on every install and schedule the local inspection as part of the job. Call (903) 623-6784 and we will handle the paperwork.
The most common reason is undersized return air from the original 1950s-to-1980s ductwork. Castle Hills has a lot of mid-century ranch homes where the return air plenum and grille were sized for a much smaller system, and when a high-efficiency unit is dropped onto that ductwork, the blower chokes, static pressure spikes, and the SEER2 rating never shows up on the bill. We measure static pressure and return air capacity before we quote, and if you need a second return added, we include that in the written price. Call (903) 623-6784 to have your ductwork checked before you commit to equipment.
A modern cold-climate heat pump can handle a Castle Hills winter on its own. Castle Hills gets a few freezing nights most years, but daytime winter temperatures are typically in the 40s and 50s, which is well inside the operating range of current heat pump models from Bryant, Carrier, and Daikin. If you have an older furnace and separate AC condenser, replacing both with one heat pump can simplify your mechanical room and lower your annual energy use. The only reason to keep a furnace is if you simply want a gas backup for the coldest nights, but it is not required here. Call (903) 623-6784 and we will give you an honest answer for your house, not a sales pitch.
Castle Hills humidity is high enough that a temperature-only system will leave your house feeling clammy even at 72°F. You want a system with a multi-speed or variable-speed blower so it can run long, low cycles that strip moisture out of the air, plus a thermostat with humidity sensing. For larger homes, we often add a whole-home dehumidifier or configure the system with a lower blower speed profile during shoulder months when the AC runs less but the humidity stays high. Call (903) 623-6784 and we will size for humidity, not just temperature.
Commissioning is the process of proving the system actually delivers what the spec sheet promises, and it is the step most installers skip. We measure airflow at each register, check static pressure, set the blower motor speed for the correct CFM per ton, verify refrigerant charge with subcooling and superheat readings, and produce a written commissioning report with before-and-after numbers. On a recent mid-century ranch near the Castle Hills Forest, we corrected static pressure from 0.9″ to 0.5″ w.c. and set the blower for 400 CFM per ton before signing off. That is the difference between a system that cools okay and one that hits its rated SEER2 on the bill. Call (903) 623-6784 for an install that includes real commissioning, not just a startup check.
Written by Andre Fuller, Owner at Halden Heating and Air San Antonio, serving Castle Hills.