General HVAC Services in Texas

Air Conditioning Repair

Taking into account the vast array of residential HVAC units, or more specifically, air conditioning units in particular, it’s easy to appreciate the importance of having a reputable company of licensed professionals on hand to provide insights and information to a regular homeowner. Whether you’re in the market to purchase an upgraded A/C unit for a current residence or if you’re in the process of mapping out and designing a property from scratch, our in-house technicians are available at your behest for all services concerning air conditioning repairs, system design & installation, inspections, troubleshooting, and much, much more. To better provide you with information regarding the HVAC, A/C, and heating service coverage offered through our company, Miller Cooling and Heating, we’ve compiled a brief list of major manufacturers, units, and systems we are frequently tasked with servicing here in Texas.

Heating System Repair

Much like the extensive cooling and A/C services we are widely recognized for here in Bexar County, Texas, the heating, furnace and boiler coverage we offer is second to none as well. We combine decades of HVAC and heating experience with modernized installation and design techniques to ensure that you, the client, is covered in absolutely every facet involving your home’s standardized heating (and cooling) systems. In light of the fact that maintaining a comfortable temperature throughout the winter is imperative during the Texas winters, we are proud to offer discounted service fees for all basic tuneups! This includes, but is not limited to, Coil Cleaning (condenser & Evaporator), Circuit & Electrical Inspection, Superheat & Subcooling Check, System Diagnostics, Energy-efficiency Assessment, Thermostat Calibration, Breaker Designation, & Water Heater Upgrades.

Duct Work Services

By far one of the most pivotal pieces of any HVAC system, a home’s ductwork is often underappreciated or underemphasized for a myriad of reasons, many unknown to the everyday homeowner. For example, during the design and installation phase if the ductwork system is poorly designed or the ductwork was installed crudely, this can prove to be very costly as it often leads to a perpetual cycle of energy consumption - treated air that is being circulated and unceremoniously wasted, unbeknownst to the average homeowner; or more commonly, one of the residential clients we are routinely hired by. The best way to solve a problem is to eliminate the need for a solution all together: our teams of skilled professionals are well-versed in all aspects of residential ductwork and ductwork systems - Designs, Installations, & Repairs.

HVAC System Services

As with any HVAC system, be it heating or cooling, requires routine maintenance or at the very least, an annual inspection to eliminate potential repairs and/or replacements. An inevitable fact, unfortunately, is that over time, even top-of-the-line air conditioning units or central heating systems (routine HVAC maintenance notwithstanding) become compromised or break, ultimately leading to part swapping or component replacement. Before any parts or components can be replaced however, it is essential that the correct issue or problem that is plaguing the A/C or heating unit be identified, addressed, and then replaced or repaired accordingly. We specialize in a variety of air conditioning units, and their inherent problems, in conjunction with our unique knowledge of nearly all the major heating units and systems.

HVAC Installation Services

It's been proven that every home, regardless of size, layout complexity, or ventilation design, benefits tremendously from their being upgraded with a brand-new, state-of-the-art air conditioning or designated heating unit. Considering the housing diversity our clients here in Bexar County, TX enjoy in terms of home size, layout, and floor plan, it's essential for every homeowner to have a system that is specifically calibrated and designed exactly to perform optimally for the property. That's where the seasoned professionals here at Miller Cooling and Heating have been known to shine - when you are ready to upgrade your home's heating or cooling system and need expert installation of the unit(s) in question, our experts are highly skilled in expediting and installing even the most complicated of units.

Residential HVAC Services – Comfort Starts at Home

Your home is your haven, and we treat it that way. At Miller Cooling & Heating, we offer comprehensive HVAC solutions to keep your living space warm in the winter, cool in the summer, and healthy all year long. Our team understands the specific challenges residential systems face — especially when it comes to balancing comfort with energy efficiency and long-term reliability.

What We Do for Homeowners:

Heating and Cooling Installations: Whether you need a new furnace, heat pump, or AC system, we help you choose the right unit based on your home’s size, layout, and usage patterns. We install it right the first time, and we’re always available to answer your questions before and after the job.

Routine Maintenance: Regular tune-ups are key to avoiding costly breakdowns. Our seasonal service plans keep your HVAC system running smoothly, increase efficiency, and extend the lifespan of your equipment.

Repairs and Emergency Service: No heat in January? AC out in July? We’re on it. Our techs are trained to diagnose and fix problems fast, without trying to upsell you on anything you don’t need.

Air Quality Solutions: We install and service air purification systems, humidifiers, dehumidifiers, and high-efficiency filters to make sure the air you breathe inside your home is clean and safe.

Our residential services are designed to be flexible and affordable. Whether you're in a single-family home, condo, or multi-unit building, you’ll get expert service backed by honest communication and clear pricing.

Commercial HVAC Services – Dependability for Your Business

We’re excited to be your partner in keeping your apartment complex, office building, or salon comfortable and smelling great. HVAC is foundational to your success, and there’s nothing we love more than eliminating it as a mental burden. With our maintenance, repair, and installation services, you just don’t have to worry any more. Best of all, we offer programs that protect you from emergency failures. Either way, we’re proud to play any supporting role in your day-to-day peace of mind.

Running a business is hard enough without HVAC problems cutting into your bottom line. At Miller Cooling & Heating, we specialize in commercial HVAC systems built for performance, durability, and minimal downtime. We understand the differences between residential and commercial work — from the equipment to the scale to the regulations involved — and we bring that expertise to every job.

What We Offer for Businesses:

System Design and Installation: Whether it’s a new build or a renovation, we work with contractors, architects, and property managers to design HVAC systems that meet your operational needs and building codes. From rooftop units to zoning controls, we deliver scalable solutions that perform under pressure.

Preventative Maintenance Contracts: HVAC issues can cost you money, customers, and comfort. Our service plans are designed to keep your systems running efficiently and to catch problems before they turn into expensive repairs.

24/7 Emergency Repairs: Time is money. That’s why our commercial clients rely on us for fast, around-the-clock service when things go wrong. We respond quickly, diagnose the issue, and get you back up and running with minimal disruption.

Retrofitting and Upgrades: Many businesses operate with outdated systems that drive up utility bills and struggle to keep up with demand. We help you evaluate your existing setup and offer modern upgrades that improve performance and reduce operational costs.

Building Automation Integration: We can integrate your HVAC system into a smart building platform to give you centralized control over temperature zones, schedules, and energy usage.

We’ve worked with retail stores, office buildings, restaurants, warehouses, and more. Our team understands the need for consistency, compliance, and customer satisfaction — and we deliver on all fronts.

Where We're Effective With Commercial Heating & Cooling

In south Texas, we’re always looking for ways to beat the heat, and businesses can be a great way to find some relief. Did you know that summer blockbusters originally came into vogue because movie theaters were one of the first types of buildings to implement air conditioning? It’s hot all the time in San Antonio and the surrounding areas, don’t be “that” business, the one that doesn’t provide any kind of relief. By calling Miller Cooling and Heating for commercial HVAC services, we can ensure that your air conditioner is always running like it should. Don’t let a hot building chase your customers away! If extreme temperatures don’t drive away customers and employees, a bad stench certainly will. A building’s HVAC system is instrumental in maintaining indoor air quality. Air is constantly cycled and recycled through a vast series of ducts, condensers, and filters. If you’ve neglected your system for a long time, your filters might be clogged, and your ducts might be filled with nasty particulates and pollutants. This can cause a variety of problems, such as funky smells, allergic reactions, or even coughing and sneezing. It’s important for everyone to be vigilant about their air quality, but especially so if you run a business that’s open to the public.