From a same-day repair to a full system replacement, Modern Air System keeps San Antonio comfortable year-round. Our certified technicians service all major brands for both homes and businesses, with honest, upfront pricing and no surprises.

Air conditioning repair and service in San Antonio

Air Conditioning Service

Fast, reliable AC repair and service for systems that are not cooling properly, making unusual noises, or struggling to keep up with the San Antonio heat.

HVAC System Replacement

Replace your whole system, split or packaged unit, with properly sized equipment. Send a photo of your nameplate for a same-day price estimate. Upgrade an aging or unreliable HVAC system with properly sized, energy-efficient equipment designed for your home and San Antonio's demanding climate.

Air source heat pump installation and service in San Antonio

Air Source Heat Pumps

Efficient heating and cooling from a single system. We install, replace, and service heat pumps for dependable year-round comfort in San Antonio homes.

Heating and furnace service in San Antonio

Heating & Furnace Service

Dependable furnace and heating repair, installation, and maintenance to help keep your San Antonio home comfortable when temperatures drop.

Ductwork Repair

Ductwork repair, sealing, and replacement to improve airflow, comfort, and HVAC performance, including static pressure testing to identify problem areas.

Ductless mini split repair and installation in San Antonio

Ductless Cooling

Flexible, energy-efficient mini-split solutions for additions, garages, sunrooms, older homes, and other spaces where traditional ductwork may not be practical.

AC Replacement

A new air conditioner sized for your home, with an honest repair-first opinion before we recommend replacement.

HVAC maintenance and tune-ups in San Antonio

HVAC Maintenance & Comfort Club

Spring and fall tune-ups that catch small problems early, and the Comfort Club plan that keeps your visits on schedule.

Air Duct Cleaning

Cleaner ducts and better airflow, with an honest look at the condition of your ductwork.

Smart Thermostat Installation

A thermostat matched to your system, wired correctly and set up so it is easy to use.

HVAC Second Opinion

Told you need a new system? We test the diagnosis and tell you honestly whether to repair or replace.

Light Commercial HVAC

Rooftop and packaged unit repair, replacement and maintenance for small businesses and commercial buildings.

HVAC for property managers in San Antonio

Property Managers & Landlords

Tenant repairs, maintenance across your portfolio and clear records for every visit.

Flexible Payment Options

Make Your HVAC Project More Affordable

Unexpected home repairs can be stressful and costly. Modern Air System offers easy, budget-friendly solutions with flexible payment options tailored to your needs, regardless of credit. Get pre-qualified in under a minute with no impact on your credit score.

Prequalify in Seconds

Begin the prequalification process quickly with no hit to your credit score.

Choose Your Plan

Select the payment option that works for your budget and submit your application.

Get Approved and Sign

Receive a fast approval, activate your loan, and complete the process without paperwork.

Available Financing Plans

Plan Number	Plan Description	Payment Factor	Example Payment on $10,000
1069	6 months with 0% and no payments, then 9.99% for 10 years	Not applicable during the first 6 months; 1.32% afterward on the remaining balance	Not applicable
1509	10.99% for 15 years	1.14%	$114
2716	6.99% for 5 years	1.98%	$198
4158	15 months with no interest; payment required	2.10%	$210

Financing is subject to lender approval. Available plans, interest rates, payment amounts, and terms may change. Contact Modern Air Systems to confirm current financing options.

Get Started Today

Contact our team to learn more about financing your HVAC repair, replacement, or installation.

Ask About Financing Call (210) 222-0201

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WHAT SETS US APART

Fast Repairs

Same-day repairs on most service calls to keep you comfortable.

Honest Pricing

Upfront, honest pricing - approved by you before we start any work.

Vetted Team

Certified, background-checked technicians you can feel confident about.

New Systems

Free estimates on new system installs and replacements.

Smart Financing

Flexible financing options available to fit your family's budget.

Full Service

Reliable residential and commercial service across South and Central Texas.

SERVICES