Our Reviews
“It is refreshing to find someone in the HVAC business that’s super thorough and knowledgeable. He explained to me what was happening and my options. We are going with a new system. After 20 years, our system needs replacement. Great install by Ernesto and team. Neat and clean! Highly recommend Apollo Heating and Cooling!”
tim f.
Satisfied Customer
“We called on a Sunday because our heater went out during a freeze and they were able to come out the same day. This is a locally owned company and you can tell they care about their customers. They were very up-front and honest, and their prices are very fair. They were able to come out the very next day and replace our system. I would highly recommend this company.”
mayve m.
Satisfied Customer
“Apollo Air Conditioning is a top-notch company that exceeded all my expectations. The service was prompt, professional, and courteous. The technicians were knowledgeable and efficient. I highly recommend Apollo Air Conditioning for all your HVAC needs. 10/10! We have loved our experience with Matthew and Apollo AC”
Brandy k.
Satisfied Customer
“Very good experience with Apollo Air, Heating and Cooling. Called today and they came out today. Andrew was very friendly and professional. Corrected the issue very quickly. Answered my questions and gave me suggestions in a manner that was not pushy at all. I will have Apollo out to do future work and I recommend them to everybody needing help with HVAC.”
chad s.
Satisfied Customer
“We were impressed with the knowledge and professionalism of our technician Nic and Apollo Air and Heating. The work was outstanding and the charges were fair and transparent. We signed up to have our HVAC system serviced by them on a regular basis. We recommend him and his company without hesitation.”
monika s.
Satisfied Customer
Is a tankless water heater worth it in San Antonio?
Two things decide it. Tankless lasts fifteen to twenty years against a tank’s eight to twelve, so the maths works for anyone planning to stay put. Against that, the upfront figure is roughly double, and on San Antonio water the annual descaling is a condition rather than a suggestion. Short-term owners rarely come out ahead.
Apollo Air Heating & Cooling Plumbing Services:
Tankless or tank: the honest comparison
| ITEM | WHERE / NOTE |
|---|---|
| Upfront Cost | Tank: $1,300 – $2,000 installed. Tankless: $3,200 – $5,200 for a like-for-like swap, $5,500 – $8,000+ if the gas line or venting has to change. |
| Service Life | Tank: 8 – 12 years. Tankless: 15 – 20, and longer with treated water. |
| Hot Water | Tank: runs out and needs recovery time. Tankless: does not run out, but flow rate caps how many fixtures can draw at once. |
| Space | Tank: takes a closet or a garage footprint. Tankless: mounts on a wall. |
| Maintenance | Tank: annual flush. Tankless on San Antonio water: annual descaling, or a softener — see below. This is the line most comparisons leave out. |
What San Antonio water and gas lines mean for a tankless install
Two things about this market change a tankless project, and most national advice skips both.
Water first. Local supply runs between roughly 150 and 350 parts per million depending on source and season, and a tankless unit concentrates all its heating into a compact exchanger — so mineral collects at the one point where it costs you performance. Left untreated, that shortens the exchanger’s working life considerably. Manufacturers know it: most warranties are conditional on either a softener or a documented yearly descale, so neglecting it can forfeit the cover as well as the equipment.
The second is gas. A modern condensing tankless can draw close to 200,000 BTU at peak — roughly three times what a 50-gallon tank pulls. The half-inch line that fed the old tank is frequently not enough. A proper install means running a pipe-sizing calculation, often upsizing the line back toward the meter, and confirming the meter itself has the capacity. That work is why a tankless conversion costs what it does, and skipping it is why some tankless units never perform the way the brochure promised.
There is a third, smaller one: most single-storey San Antonio homes have the water heater in the attic, where summer temperatures pass 140°F. It affects access, condensate routing and how the unit should be secured.
Is a tankless unit right for your home?
Good candidates: households that regularly exhaust a tank mid-morning, anyone who wants the closet footprint back, owners with a decade-plus horizon, and homes already getting water treatment. Poor candidates: a sale inside a few years, a gas supply that would need serious rework for someone else to enjoy, or a household nobody expects to book the annual descale. We will say plainly which list you are on, and a tank is often the honest recommendation.
What tankless installation costs in San Antonio
| SERVICE | SAN ANTONIO RANGE, 2026 | WHAT DRIVES IT |
|---|---|---|
| Like-for-like tankless swap | $3,200 – $5,200 | Replacing an existing tankless, or a tank where the gas line and venting already support the load. |
| Tank-to-tankless conversion | $5,500 – $8,000+ | The common case. Gas line upsizing, new venting, and sometimes relocation drive the number, not the appliance. |
| Standard tank replacement, for comparison | $1,300 – $2,000 | Included so the decision is an informed one rather than a sale. |
| Water treatment alongside | Quoted with the install | A softener fitted at the same time protects the unit from day one and usually satisfies the warranty condition. |
Those are San Antonio market ranges for 2026 and the spread is genuinely wide — published local figures run from under $3,000 to over $10,000, because a swap and a conversion are different projects wearing the same name. Ours comes in writing after someone has looked at the gas line. Financing is available at 0% for 24 months.
Why the install matters more than the unit
Dual-licensed for HVAC and plumbing — TACLA128041E and M39895 — which on this job means the same company handles the gas line, the venting and the water treatment instead of coordinating three. BBB Accredited A+ since 2023, 5.0 stars across 900+ Google reviews, 100% workmanship guarantee, 0% financing for 24 months, and emergency service around the clock.
“Nick and Scott did a great job installing our water heater. They arrived on time., were efficient. clean, and very respectful.”
VIRGINIA L. gOOGLE Review
We install tankless systems throughout San Antonio.
- Boerne, TX
- Bulverde, TX
- Cibolo, TX
- Fair Oaks Ranch, TX
- Helotes, TX
- Hollywood Park, TX
- New Braunfels, TX
- San Antonio, TX
- Schertz, TX
- Selma, TX
- Shavano Park, TX
- Stone Oak, TX
current Specials
$99 drain cleaning
Slow drain? Backed-up sink? Get it flowing again
Cannot be combined with other offers or discounts. Restrictions apply.
20% off all repairs with CosmicCare
Applies to any member signed to cosmiccare membership
Cannot be combined with other offers or discounts. Restrictions apply.
$50 off any plumbing or HVAC repair
applies to any plumbing or HVAC repair over $200
Cannot be combined with other offers or discounts. Restrictions apply.
Your AC Ready?$49 AC tuneup
Don’t wait for the first heat wave to find out your system isn’t up to the job.
Cannot be combined with other offers or discounts. Restrictions apply.
$49 water heater flush
Water Heater Flush removes years of buildup and restores efficiency.
Cannot be combined with other offers or discounts. Restrictions apply.
Free service calls with inspection report
diagnostic fee waived with repairs
Cannot be combined with other offers or discounts. Restrictions apply.
Frequently Asked Questions
How much does a tankless water heater cost to install in San Antonio?
A like-for-like swap runs $3,200 to $5,200. Converting from a tank pushes it to $5,500 or beyond, sometimes past $8,000, because the gas line usually needs upsizing and the venting rebuilding. For comparison, replacing the tank with another tank is $1,300 to $2,000. Financing is available at 0% for 24 months.
How long does a tankless water heater last?
Fifteen to twenty years, against eight to twelve for a tank — and that gap is the main financial argument for going tankless. It assumes the descaling gets done. On San Antonio water, a neglected tankless unit will not reach the top of that range.
Do I need a water softener with a tankless water heater?
Either a softener or documented annual descaling — most manufacturer warranties require one or the other, and San Antonio water is hard enough that it matters. A tankless unit heats water across a narrow exchanger, so scale collects exactly where it hurts performance. Fitting treatment at the same time as the unit is cheaper than retrofitting it later and protects the warranty from day one.
Will my gas line need to be upgraded for a tankless water heater?
Often, yes. A condensing tankless can draw close to 200,000 BTU at peak, roughly three times a 50-gallon tank, and the half-inch line that fed the tank frequently cannot deliver it. A proper installation includes a pipe-sizing calculation and a check that the meter has capacity. This is the single most common reason a tankless install costs more than the appliance suggests.
Can a tankless water heater keep up with a whole house?
Yes, if it is sized on flow rate rather than guessed from the old tank’s gallons. The right question is how many fixtures might draw hot water at once — two showers and a dishwasher is a different unit from one bathroom. Undersizing is the usual reason someone says tankless did not work for them.
Is a tankless water heater worth it if I’m selling soon?
Honestly, usually not. The savings arrive over years and the upfront cost is roughly double a tank. If you are moving within a few years, a standard tank replacement is the better financial call, and we will say so.
We Serve All Major Brands
We install and warrant all major brands, and we size to the household rather than to whatever fits the old footprint — flow rate, fixture count and simultaneous demand, not just gallons. Whatever goes in, the work carries our 100% workmanship guarantee.
