Tankless Water Heaters in Gainesville, FL

Endless hot water, your garage back, and a plumber who will tell you straight whether tankless is actually the right buy for your house.

Rather text? Send a photo of the problem to 352-377-9447 and we’ll tell you what it sounds like.

Licensed Florida Plumbing Contractor CFC1430748

Locally owned, out of Hawthorne. Gainesville city water runs about 8.2 grains per gallon of hardness, the mineral load a heat exchanger fights every day. Annual tankless flush

years of service life from a maintained tankless, against eight to twelve for a typical tank in Florida

20 +

service call to come out, look at your gas line and panel, and price it, waived on larger jobs

$ 69

vinegar flush to keep the heat exchanger clear and the manufacturer warranty intact

1 x a year

Tankless water heater installation in Gainesville, FL from First Choice Plumbing covers Navien gas and electric units for homes and businesses across Alachua County. A licensed plumber tests your water, sizes the unit to your flow rate, handles the gas line, venting and permit, and backs the install with a two year parts and labor warranty. Call or text (352) 377-9447.

Is a Tankless Water Heater Worth It in Gainesville?

Here is the honest version, and it is the same thing we would tell a neighbor.

Tankless is worth it when you keep running out. A family of five with two bathrooms, back to back showers on a school morning, laundry going at the same time. A tank hands out fifty gallons and then makes you wait. A properly sized tankless does not run out, because it heats the water as it moves through.

It is also worth it when space matters. The unit hangs on a wall about the size of a carry-on suitcase, which gives you back a closet or a corner of the garage. And it does not sit there all day burning fuel to keep water hot for a house that is empty until six.

Tankless makes sense if:

You run out of hot water regularly.
Two or more showers run at once.
You want the closet or garage corner back.
You are already remodeling or moving the water heater.
You plan to stay in the house ten years or more.

Stick with a tank when the install would cost more than the benefit. If your gas line is undersized and the run is long, if your panel is already full, if the unit would have to move across the house, the extra work can double the job. If your current setup works and you just need a new unit, a straight tank swap is usually the smart money. Water heater installation and replacement

And be honest with yourself about maintenance. A tankless needs a flush every year in our water. If that is not going to happen, buy a tank. We would rather sell you the right tank today than the wrong tankless you resent in four years.

Stick with a tank if: your current tank keeps up fine, the gas line or electrical panel would need major work, the unit sits in a tight interior closet with no easy venting, you will not keep up with an annual flush, or you are selling within a couple of years.

What Does a Tankless Water Heater Cost in Gainesville?

Most plumbing sites will not answer this. We will, as straight as we can from a web page.

Nationally, a tankless install runs somewhere around $1,400 to $3,900, with electric usually landing at the low end and gas higher because of the venting and the gas line work. Those are national cost guide ranges, not a quote from us. Anyone who gives you a firm price for your house without seeing your gas meter or your panel is guessing.

What moves your number: gas or electric, condensing or non-condensing, how far the unit sits from the meter, whether the gas line has to be upsized, whether the venting has to be rerouted, and whether your water needs treatment first.

Two things worth knowing before you budget. The federal energy efficient home improvement credit that used to help with water heaters expired at the end of 2025, so there is no federal tax credit for a tankless installed in 2026. Do not let anybody tell you otherwise. On the other hand, GRU publishes a rebate for converting an electric, oil or LP water heater to natural gas, and that one is still real. We will point you at it.

What we can promise now is how you get the number. It is $69 for us to come out and look, that $69 comes off the ticket on larger jobs, and you get one written price before any work starts. Financing runs through Wisetack on jobs from about $500. Plumbing financing

Not ready to book? Text a photo of your gas meter and your water heater closet to (352) 377-9447 and we will tell you what you are working with.

The Guy Whose Name Is on the License

Will Harrod is the owner and the Florida certified plumbing contractor behind First Choice Plumbing, license CFC1430748. He runs the estimates himself, so the person telling you whether tankless fits your house is the person accountable for it working. Mike runs the service calls and the annual flushes. Kim answers the phone and dispatches, which is why you get a person and not a call center.

It is a small local crew by choice. Small enough to sit down and walk you through the gas sizing on a napkin, and big enough to get it installed this week.

Do Tankless Water Heaters Work With Our Water?

Yes, and there is a catch worth understanding before you spend the money.

City water from GRU comes out of the Floridan Aquifer and runs moderately hard, right around 140 milligrams per liter as calcium carbonate. That is about 8.2 grains per gallon. In a tank, those minerals settle to the bottom as sediment. In a tankless, they bake onto the walls of a narrow heat exchanger instead, because that is where the heat is. Scale in a heat exchanger is not a nuisance. It chokes flow, drives the unit to fire harder, and it is the single most common reason a tankless dies young.

The fix is not complicated. Flush it once a year. We do it with vinegar, not chemicals, through the isolation valves we install on every unit so the service is quick and cheap forever after. Navien is clear that skipping maintenance can void the manufacturer warranty, so this is not an upsell, it is the terms of the deal. Tankless flush service

If you are on a private well out toward Hawthorne, Melrose, Micanopy or Waldo, the math changes. The aquifer is naturally high in iron and sulfur, nobody is treating your water but you, and hardness out there can run well above what GRU delivers. On untreated well water we will usually recommend treatment first, or a tank instead. Putting a tankless on raw well water is how you buy an expensive appliance twice. Well water filtration

We test your water for free before we quote a tankless. Every time.

GRU city water: about 8.2 grains per gallon

In a tankless, those minerals bake onto the walls of a narrow heat exchanger instead, because that is where the heat is.

Flush it once a year

We do it with vinegar, not chemicals, through the isolation valves we install on every unit so the service is quick and cheap forever after.

Private wells change the math

The aquifer is naturally high in iron and sulfur, nobody is treating your water but you, and hardness out there can run well above what GRU delivers.

Free water test before we quote

We test your water for free before we quote a tankless. Every time.

What Does a Tankless Install Actually Involve?

Gas

A whole house gas tankless is a big burner. A 199,000 BTU unit generally wants three quarter inch gas line minimum on a short run, and a full inch once the run gets past fifty or sixty feet from the meter. Most homes here were piped for a forty thousand BTU tank, so the line often has to be upsized. That is normal, it is not a surprise we spring on you at the end, and it is exactly why we look at the meter and the run before we quote.

Electric

Whole house electric tankless is honest about nothing if the panel cannot carry it. These units commonly want multiple double pole breakers and a service that can handle the draw, which in a lot of older Gainesville homes on a hundred or a hundred and fifty amp service simply is not there without a panel upgrade. Electric tankless is a great fit for a point of use application, a guest bath, a shop sink, an addition. For a whole house on an old panel, gas is usually the better road.

Venting and condensate

A condensing unit vents in PVC and produces acidic condensate that needs a proper drain and often a neutralizer. A non-condensing unit needs stainless steel venting. We install isolation valves on every unit so future flushes take minutes instead of hours. We pull the permit and the inspection either way.

More than swapping a box on a wall, and anyone who tells you otherwise has not looked at your house. Need the old unit looked at first? Water heater repair

What Size Tankless Water Heater Do You Need?

Tankless is not sized in gallons.

It is sized in gallons per minute, and in how far the unit has to raise the temperature to get there.

That second part is good news for us. Groundwater in North Central Florida comes in somewhere in the low to mid seventies most of the year. Up north a tankless is fighting water in the forties and loses a lot of its rated output doing it.

Same unit, more performance here.

Here we are asking for a much smaller temperature rise, so a unit rated eleven gallons a minute on the box realistically gives a Gainesville home somewhere around seven to eight gallons a minute of usable hot water. Same unit, more performance, purely because of where you live.

What runs at the same time?

So the question is simple. What runs at the same time on the worst morning of your week? Count the showers, then add anything else that overlaps. A shower is roughly two gallons a minute, a kitchen sink about one and a half, a dishwasher or washing machine about two.

If your old tank never once ran out, tell us. You may need less unit than a salesperson would sell you.

What runs at once	Flow you need	Typical unit here
One shower, one bathroom home	About 2 GPM	Small gas unit, or electric if the panel allows
Shower plus a sink or dishwasher	About 3.5 GPM	Mid size gas condensing unit
Two showers at the same time	About 4 to 5 GPM	199,000 BTU gas condensing unit
Two showers plus laundry	About 6 to 7 GPM	199,000 BTU condensing unit, or two units linked

The Difference Is in the Details

None of this is complicated. It is just the stuff that decides whether you are happy in five years.

What matters	First Choice Plumbing	Typical Installer or Big-Name Brand
Before the quote	Free water test, and we look at the gas meter, the run and the panel first.	A phone quote off a model number, with the surprises found on install day.
Will they talk you out of it	If a tank is the smarter money for your house, we say so and we install that instead.	Tankless is the higher ticket, so it is usually the recommendation.
What it costs to look	$69, and it comes off the ticket on larger jobs.	A diagnostic fee that is usually not published anywhere on the site.
Hard water	We know what 8.2 grains does to a heat exchanger and we treat the water before we hang the unit.	Scale is usually discussed after the first failure, not before the sale.
Service access	Isolation valves installed on every unit so an annual flush is quick and cheap forever.	Commonly skipped to shave the install cost, which makes every future flush expensive.
Permits	Pulled through the right office for your address, inspection handled.	Usually handled, but worth asking about in writing.
The mess	We patch every hole we cut, with a professional drywall contractor.	Patching is commonly excluded and left to the homeowner.
Warranty	Two years parts and labor from us, plus the manufacturer warranty.	Commonly one year labor, varying by location.

Do You Need a Permit for a Tankless Water Heater in Alachua County?

Yes. In Florida a permit is required to alter, repair, replace or convert a plumbing system, and going from a tank to a tankless is a bigger change than a straight swap. If the gas line is being upsized or a new vent is being cut through the wall, that is squarely permit territory.

Which office issues it depends on your address. If you are in unincorporated Alachua County it goes through the county’s Growth Management Building Division. If you are inside the Gainesville city limits, or in another municipality, it goes through that city’s building office. We handle it either way. You do not call anybody.

It matters more than people think. Gas appliances and venting are the part of a plumbing system where a shortcut can hurt somebody, and the inspection is the outside check that it was done right. An unpermitted install can also surface later during a home sale or an insurance claim.

Our license number is CFC1430748, and it is on every quote we hand you. Licensing and insurance

What Getting This Wrong Actually Costs

A badly bought tankless does not fail loudly on day one. It disappoints slowly. An undersized unit that goes lukewarm when the second shower starts. A gas line too small, so the burner never reaches its rating and you paid for output you will never see. No isolation valves, so the first flush costs three times what it should and you skip it. Then scale builds, the heat exchanger clogs, and the warranty claim gets denied because the maintenance was never done.

None of that is the appliance’s fault. All of it is a sizing and install decision that somebody made in about ten minutes.

What It Looks Like Done Right

Hot water that does not run out no matter who showers last. A garage corner you got back. A unit sized to your actual house, fed by a gas line that can carry it, with service valves hanging right there so the yearly flush takes an hour. A permit on file, a written warranty in a drawer, and a plumber’s number in your phone who will actually pick up.

Tankless Questions We Get Every Week

Are tankless water heaters worth it in Florida?

Often yes, for two reasons. Groundwater here comes in warm, so a tankless has less work to do and delivers closer to its rated flow than the same unit would up north. And a tankless does not spend all day keeping fifty gallons hot for an empty house. It is worth it if you run out of hot water, want the space back, and will keep up with the annual flush. If your current tank keeps up fine, a straight tank swap is usually the smarter money.

How much does a tankless water heater cost in Gainesville?

Nationally a tankless install runs about $1,400 to $3,900, with electric lower and gas higher because of venting and gas line work. Your number depends on gas or electric, the distance from the meter, whether the gas line needs upsizing, and whether the venting has to be rerouted. It is $69 for us to come look and price it, and that comes off the ticket on larger jobs.

Do tankless water heaters work with hard water?

They do, but the water has to be respected. GRU water runs around 8.2 grains per gallon, and those minerals bake onto the walls of a narrow heat exchanger instead of settling harmlessly in the bottom of a tank. Flush it once a year and it is a non-issue. Skip the flushes and scale is what will eventually kill the unit.

How often should a tankless water heater be flushed?

Once a year on city water here. On untreated well water it can be more often. We do it with vinegar, not chemicals, and we install isolation valves on every unit so the service is quick. Navien is clear that skipping maintenance can void the manufacturer warranty, so it is part of owning one, not an add-on.

Do I need a bigger gas line for a tankless water heater?

Frequently, yes. A 199,000 BTU unit generally wants three quarter inch minimum on a short run and a full inch once you get past fifty or sixty feet from the meter. Most homes here were piped for a forty thousand BTU tank. We check the meter and the run before we quote so it is in the price, not a surprise on install day.

Can I put a whole house electric tankless in an older Gainesville home?

Sometimes, but the panel usually decides it. Whole house electric tankless units draw hard and commonly need multiple double pole breakers and a service that can carry them. On a hundred or a hundred and fifty amp panel that usually means a panel upgrade first. Electric tankless is an excellent fit for a point of use spot like a guest bath or a shop sink.

How long does a tankless water heater last?

A maintained tankless commonly runs twenty years or more, against eight to twelve for a typical tank in Florida. The word doing the work in that sentence is maintained. An annual flush and clean filters are the difference between twenty years and eight.

Is there a tax credit for a tankless water heater in 2026?

Not a federal one. The federal energy efficient home improvement credit that covered water heaters expired at the end of 2025, so a unit installed in 2026 does not qualify. GRU does publish a rebate for converting an electric, oil or LP water heater to natural gas, and we will point you at it. Financing through Wisetack is available on jobs from about $500.

Licensed and insured

Licensed Florida plumbing contractor CFC1430748. Two year parts and labor warranty.

Permit pulled and inspected

Pulled through the right office for your address, inspection handled.

Free water test first

Free water test before we quote. One written price before we start.

Financing from about $500

Financing runs through Wisetack on jobs from about $500. $69 to come out, waived on larger jobs.

Where We Install Tankless Water Heaters

We are based in Hawthorne and we run tankless work across Gainesville and greater Alachua County, plus the surrounding towns where the wells are: Micanopy, Waldo, Melrose, Newberry, High Springs, Archer and out toward Interlachen and Keystone Heights.

Gainesville | Hawthorne | Alachua County

We do this for homes and for businesses. Restaurants, salons and small commercial buildings are often the best tankless candidates in the county, because the demand is heavy, spread through the day, and the floor space is worth money. Commercial plumbing

If your water heater failed after hours, do not wait until morning to shut the water off. Emergency plumber

Let's Find Out If Tankless Fits Your House

Tell us what runs at once on a bad morning and we will tell you straight whether tankless is the right buy or whether a tank does the job for less. Book your free water test

$69 to come out, waived on larger jobs. Free water test before we quote. One written price before we start. Two year parts and labor warranty. We patch every hole we cut. Licensed Florida plumbing contractor CFC1430748.

Tell us what's going on and we'll take it from there

You get a real person, a $69 visit, a flat price before we start, and a company that patches what it cuts and answers the phone when you call back. If a smaller fix is the right call, we’ll tell you that too.

First Choice Plumbing is a locally owned, owner led plumbing company working Gainesville, Hawthorne and Greater Alachua County. Leak detection, repipes, water heaters, drains, trenchless lining, well water filtration and septic. We find it, we fix it, we guarantee it.

Florida Certified Plumbing Contractor CFC1430748

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