How long does a furnace installation take?

A standard residential furnace replacement is typically completed in one day. Removal of the old unit, placement and connection of the new furnace, gas and electrical work, venting verification, thermostat setup, and system testing all happen during that visit. Projects that also involve ductwork modifications, a change in fuel type, or relocation of the unit can extend into a second day, and we tell you which category your home falls into before you approve the work.

How do I know what size furnace my home needs?

Furnace size is determined by a heat-load calculation, not by the size of your old unit. Our service professionals evaluate square footage, ceiling height, insulation, window area and orientation, and ductwork capacity to calculate how much heat your home actually loses. Simply matching the previous unit repeats any sizing mistake the original installer made, which is why we measure before recommending equipment.

Is it better to repair or replace my furnace?

Repair usually makes sense when the furnace is under 12 years old and the failed component is isolated. Replacement usually makes sense when the unit is past 15 years, has a cracked heat exchanger, or has required multiple significant repairs in consecutive seasons. We present both paths with pricing so you can compare, and if the repair is the smarter financial decision, we will say so.

Do you offer financing for a new furnace?

Yes, financing is available on qualifying systems through Aire Serv. We also currently offer $500 off installation of a new high-efficiency HVAC system, and the diagnostic fee is waived from your total invoice when you proceed with the installation. Discounts of 10% are available for first responders, teachers, seniors, veterans, and military with valid ID.

What furnace brands do you install and service?

Aire Serv installs and services all major furnace brands, including Trane, Carrier, Lennox, Goodman, Rheem, Ruud, American Standard, York, Amana, Payne, and Heil. Because we are not limited to a single manufacturer, we can recommend equipment based on your home's heat load and budget rather than on brand availability. Every installation is backed by the Neighborly Done Right Promise®.

Furnace Installation and Replacement in Alamo Heights, TX

Same-day service, guaranteed upfront pricing, and financing on qualifying systems

When a furnace stops holding temperature, Aire Serv of Alamo Heights sizes and installs the right replacement for your home in Alamo Heights, Terrell Hills, Balcones Heights, Kirby, Castle Hills, Windcrest, and Monte Vista. We install all major brands, confirm your price before work starts, and charge by the job instead of the hour. Calls are answered 24 hours a day, Saturday appointments are available, and financing is offered on qualifying systems.

Same-day service, guaranteed upfront pricing, and financing on qualifying systems

Residential
Commercial

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How Furnace Replacement Works in Alamo Heights

A furnace replacement starts with measurement, not a catalog. Our service professionals evaluate square footage, insulation, window exposure, ductwork condition, and how your Alamo Heights home actually loses heat, then recommend equipment sized to that load. An oversized furnace short-cycles and wears out early; an undersized one runs constantly and never gets comfortable.

You receive your options and pricing before installation day, including efficiency ratings, expected operating cost, and available financing. We charge by the job, not the hour, so a longer installation does not change the number you approved.

On installation day, the old unit is removed, the new furnace is set and connected, gas and electrical connections are made to code, venting is verified, and the thermostat is configured. We test combustion, static pressure, and temperature rise before leaving, and we clean the work area.

We install and service all major brands, including Trane, Carrier, Lennox, Goodman, Rheem, American Standard, and York, so your existing ductwork, thermostat, and indoor air quality equipment can often be integrated rather than replaced.

Our current offer includes $500 off installation of a new high-efficiency HVAC system, and the diagnostic fee is waived from your invoice when you move forward with a new installation. Every installation is backed by the Neighborly Done Right Promise® and performed by a fully insured team.

We evaluate square footage, insulation, window exposure, and ductwork capacity to size equipment to your actual heat loss. An oversized furnace short-cycles and wears out early; an undersized one runs constantly without reaching temperature.
You receive equipment choices, efficiency ratings, expected operating cost, and financing terms before we order anything. Pricing is charged by the job, so a longer installation does not change the number you approved.
We remove the old unit, set and connect the new furnace, complete gas and electrical work to code, verify venting, configure the thermostat, and test combustion, static pressure, and temperature rise before leaving.

Signs It Is Time to Replace Your Furnace

Furnaces rarely fail without warning. The most reliable indicator is age: most gas furnaces are engineered for 15 to 20 years of service, and once a unit passes that mark, repair costs tend to arrive in clusters rather than isolated incidents. If you have paid for two or more significant repairs in the past two heating seasons, replacement usually costs less over the following five years.

Rising utility bills without a change in usage point to declining efficiency. So do uneven temperatures between rooms, a blower that runs almost continuously, and a burner that struggles to ignite. Yellow or flickering burner flames, soot around the unit, and unusual banging or rattling during startup all warrant an immediate professional inspection.

Safety concerns move a furnace from the repair column to the replacement column quickly. A cracked heat exchanger cannot be safely patched, and any carbon monoxide detector activation should be treated as an emergency. Because many properties in Alamo Heights and Monte Vista contain original or early-replacement equipment in tight utility spaces, we inspect venting and combustion carefully on every call.

Replacement is also an efficiency opportunity. Newer high-efficiency furnaces deliver more usable heat per unit of fuel than the equipment they replace, and pairing a new furnace with a matched air conditioner or heat pump improves airflow across both seasons.

We will tell you honestly when a repair is the better decision. When replacement is the right call, you get written options, upfront pricing, available financing, and same-day scheduling with no extra charge for evening or weekend work.

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Signs It Is Time to Replace Your Furnace

The Aire Serv Advantage

From tune-ups and maintenance to heater repair and air conditioning replacement, we provide services that keep the air you breathe clean and keep your home or business at the perfect temperature.

Guaranteed Upfront Pricing

We quote by the job not the hour, so you know the final price won't change with no hidden fees.
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The Neighborly Done Right Promise^®

We'll get the job done right and ensure you are happy with our work.
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We Treat Your Home Like Our Own^®

Expertly trained, background checked, and committed to respecting your home and putting you first.
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Anytime Customer Service

We're here for you 7 days a week, 365 days a year, and we always take extra precautions to safeguard your home during our visits.
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Aire Serv of Alamo Heights

Aire Serv of Alamo Heights installs and replaces furnaces for homes and businesses in Alamo Heights, Terrell Hills, Balcones Heights, Kirby, Castle Hills, Windcrest, Monte Vista, and nearby San Antonio communities. We install all major brands, offer financing on qualifying systems, and answer calls 24 hours a day, including weekends and holidays.

HVAC Services in Alamo Heights and Surrounding Areas

Beyond furnace installation, our insured service professionals handle air conditioning, heat pumps, mini-splits, boilers, ductwork, water heaters, and indoor air quality equipment across Alamo Heights and neighboring communities. Pricing is confirmed before work begins and charged by the job, not the hour. Browse the services below or schedule an appointment online.

Residential
Commercial

Furnace Installation FAQs

Replacing a furnace is a significant decision, and most homeowners in Alamo Heights want clarity on sizing, timing, cost structure, and what happens on installation day. The answers below cover the questions we hear most often. If something is not addressed here, our team answers calls 24 hours a day and can walk you through your options.

A standard residential furnace replacement is typically completed in one day. Removal of the old unit, placement and connection of the new furnace, gas and electrical work, venting verification, thermostat setup, and system testing all happen during that visit. Projects that also involve ductwork modifications, a change in fuel type, or relocation of the unit can extend into a second day, and we tell you which category your home falls into before you approve the work.
Furnace size is determined by a heat-load calculation, not by the size of your old unit. Our service professionals evaluate square footage, ceiling height, insulation, window area and orientation, and ductwork capacity to calculate how much heat your home actually loses. Simply matching the previous unit repeats any sizing mistake the original installer made, which is why we measure before recommending equipment.
Repair usually makes sense when the furnace is under 12 years old and the failed component is isolated. Replacement usually makes sense when the unit is past 15 years, has a cracked heat exchanger, or has required multiple significant repairs in consecutive seasons. We present both paths with pricing so you can compare, and if the repair is the smarter financial decision, we will say so.
Yes, financing is available on qualifying systems through Aire Serv. We also currently offer $500 off installation of a new high-efficiency HVAC system, and the diagnostic fee is waived from your total invoice when you proceed with the installation. Discounts of 10% are available for first responders, teachers, seniors, veterans, and military with valid ID.
Aire Serv installs and services all major furnace brands, including Trane, Carrier, Lennox, Goodman, Rheem, Ruud, American Standard, York, Amana, Payne, and Heil. Because we are not limited to a single manufacturer, we can recommend equipment based on your home's heat load and budget rather than on brand availability. Every installation is backed by the Neighborly Done Right Promise®.

Residential
Commercial