
Rinnai
Compare SENSEI RX and RXP condensing gas models, rated up to 0.98 UEF.
Get help with your tank or tankless water heater, from a repair to a replacement planned around your home. Our specialists serve homeowners across Greater Houston.
For installation, start with a phone estimate. We’ll confirm the details and final quote at your home. Find your service below.
Modern comfort. Good old-fashioned care.








Most Houston homeowners assume a bigger tank means more hot water. A properly sized tankless unit delivers unlimited hot water while cutting your gas bill by 30% or more. We have installed more than 1,400 systems across Greater Houston.
We calculate the sizing for every installation, include a gas line evaluation in every quote and put the quote in writing. Installations start at $4,200, and most are finished in a single day.

Gone cold mid-shower, or blinking a code that wasn’t there yesterday? We’re factory-authorized for Rinnai, Navien, Noritz, Takagi and Rheem, and we trace every error to the part that failed.
Most tankless repairs run $150 to $600, most are finished in a single visit, and every repair carries a 1-year parts and labor warranty.

Houston’s hard water coats a tankless heat exchanger a little more every time it fires. We’ve seen it hundreds of times across Katy, The Woodlands and everything inside the Loop: a repair bill that could have been a $195 flush.
Our 12-point annual service is $195 flat, including professional descaling and a written report for your warranty records. Most appointments are available within 48 hours, with two-hour arrival windows.

Traditional commercial tanks often fail to meet demand during peak hours, and a tank that runs dry at the dinner rush or the morning shower peak costs you business. Commercial tankless cascades heat water continuously and cut standby losses.
Every project starts with a site visit, and you get a detailed proposal within 48 hours. We have over 20 years of commercial experience across Greater Houston.

Tankless gets the attention, but for many Houston homes a gas or electric tank is still the smarter buy: lower upfront cost, simpler installation and proven reliability. We size every tank to your household’s busiest hour.
Installations start at $2,500, and a like-for-like replacement includes removal of the old tank and the permit. Most are finished in a single visit, and we’ll tell you honestly if tankless would serve you better.

A leaking tank, a cold shower or water that won’t hold its temperature deserves a proper diagnosis. We test each component before recommending a fix, on tank and tankless, gas and electric, from every major brand.
Most repairs run $165 to $1,200 and are finished in a single visit, because our trucks carry the most common OEM parts. Every job starts with a free estimate.

Houston’s water is treated for safety but not for quality. Chloramine, sediment, hard water minerals and, in some areas, PFAS pass through city treatment and into your home every day.
A whole-house system intercepts them at the main water line. We test your water first, then install the system it needs, usually in 2 to 4 hours.

Every installer has a favorite system to sell, and very few start by asking how your family actually uses hot water. We install tank and tankless every day, so we start with how your family uses hot water and what your gas line and venting can support.
Tank installations start at $2,500 and tankless at $4,200, with the City of Houston permit and code upgrades included. You see both prices before you decide.

Leaking, rusting or past its prime? Call before noon and we can usually have hot water running again by evening, anywhere from Katy to Kingwood.
Replacements start at $2,500 installed, with haul-away, the City of Houston permit and code upgrades included. If a $165 repair is the better answer, we’ll tell you.

Explore the manufacturers we work with, then ask which options fit your household and existing setup. Equipment choice starts with your home’s hot water needs.
How many fixtures run together? What fuel supply and venting are already in place? We’ll help you compare equipment around those details, including whether a tank or tankless system makes sense for you.


Hot Water Guys was founded by Tom Massimin and Kenny Browning. Water heating is our specialty, with more than 20 years of experience serving Greater Houston.
We work with both tanks and tankless systems. That means helping you weigh your household’s demand, your current plumbing, and your budget—not assuming one type fits every home.
From the first phone estimate to the final system walkthrough, our job is to make the next step understandable.

Kenny BrowningCo-founder
Great service. Very responsive and helpful.
Very efficient. Good job.
We start with an estimate over the phone. A site visit confirms the work and final quote, then we arrange the installation date with you.
Tell us what’s happening: your current water heater, the problem you’ve noticed, or the upgrade you have in mind. We’ll start with an estimate over the phone.
Unsure whether you need a repair or replacement? That’s a good place to begin.

We’ll schedule a site visit, review the existing equipment and installation needs, and answer your questions. The final quote reflects the work your home actually needs.
Capacity, connections, venting, and permit requirements all belong in that conversation.

Choose your installation date. We’ll remove the old unit, set up the new water heater, and walk you through the system.
For a standard tank replacement, our published guide allows 2–4 hours; a more involved tankless conversion can take 6–8 hours. We’ll discuss your job before scheduling.
Water heater installation, repair, and maintenance across Greater Houston. From Houston and its nearby communities to The Woodlands, Fort Bend, and the coast, find the local service page for your home.
Some areas are subject to an additional travel fee.
Call to confirm coverage for your address.
SERVING Greater Houston
Close to home, across the metro. We serve Houston, Bellaire, Spring, Cypress, Tomball, and Jersey Village, plus Katy, Sugar Land, Richmond, Missouri City, and other listed communities.
North of Houston, our directory includes The Woodlands, Conroe, Magnolia, Montgomery, Willis, and Splendora. You’ll also find linked service information for Galveston, Brazoria, Waller, Brookshire, Liberty, and Cleveland.

Ready to talk about your home?Call to confirm your address and any travel fee, or send us a service request.
Your water heater is part of a whole system. The best next step starts with how your home uses hot water.
A tank stores a supply of hot water. A tankless heater heats water as it flows through the unit. The choice depends on your budget, available space, fuel supply, and how many fixtures may run together.
For a larger home, capacity and simultaneous demand matter more than a blanket recommendation. We install both types and can explain the changes each would require.
A leak, error code, or change in temperature is a reason to investigate. The age and condition of the system, the cause of the problem, and the repair needed help shape the decision.
Start with a diagnosis. If replacement is the better next step, discuss equipment size, installation work, and the final quote before scheduling.
Minerals can build up inside water heating equipment. Our tankless maintenance includes descaling, cleaning air filters, and inspecting components such as the heat exchanger.
Discuss a service schedule for your system and water conditions. Considering treatment throughout the home? Explore our whole-house filtration service, too.
Use these published Houston ranges as a starting point. Your final quote reflects the equipment and the work your home needs.
Like-for-like tank replacement
$2,500 – $4,500High-efficiency tankless installation
$4,200 – $8,000Published planning ranges for different project scopes. The site visit confirms your final quote.
Unit capacity, permit fees, and any venting upgrades can affect the price. Replacing a similar tank and converting to tankless may involve different work, so start with the existing setup and your household’s demand.
A standard tank replacement typically takes 2–4 hours; a more involved tankless conversion can take 6–8 hours. We’ll discuss your installation before choosing a date.
Our process begins with an estimate over the phone, followed by a site visit and final quote. You can review the plan before scheduling the work.
Our published planning ranges are $2,500–$4,500 for like-for-like tank replacement and $4,200–$8,000 for tankless equipment and installation. These cover different project scopes. The final quote depends on the selected model, site conditions, and required work.
Start with a phone estimate, then confirm the details during a site visit.
Need a repair, planning a replacement, or comparing options? Call Hot Water Guys or send a request through our contact page. For installation, we’ll start with a phone estimate and confirm the final quote at a site visit.