Navien · Rinnai · Rheem · On-Demand Hot Water
Tankless Water Heater Installation in Kissimmee, FL
Never run out of hot water again. We install, replace, and service tankless water heaters throughout Kissimmee and Osceola County — with permits pulled and manufacturer warranties honored.
⚡ Up to 40% Energy Savings
📋 Permit Included
⚠️ Signs Your Tank Water Heater Is Failing
- Running out of hot water before showers are done
- Rumbling or popping noises from the tank
- Rusty or discolored hot water
- Tank is 10 or more years old
- Visible corrosion or rust around the base
- Water pooling under the unit
- Unexplained spike in your electric or gas bill
- Pilot light keeps going out (gas heaters)
Why Kissimmee Homeowners Are Switching to Tankless
A traditional tank water heater keeps 40–80 gallons of water hot 24 hours a day whether you use it or not. In Kissimmee’s climate, where ground temperatures are warmer year-round, tank heaters still cycle constantly to maintain temperature — and most are sized for peak demand rather than typical daily use, meaning you’re paying to heat water you never use.
Tankless units heat water only when you turn on the tap. A properly sized gas tankless heater can cut water heating costs by 30–40% compared to a standard tank. For vacation rental properties and short-term rentals along US-192, the improvement is even more pronounced: multiple guests running showers simultaneously never exhaust the supply, and the unit sits idle — using zero energy — between guest stays.
Valmont Build & Mechanical installs Navien and Rinnai tankless systems as our primary brands — both are built specifically for Florida’s hard water and humidity conditions. We size every unit to your home’s actual demand, pull the required Osceola County permit, and handle the gas line or electrical upgrade if needed.
Tank vs. Tankless: Side-by-Side Comparison
Here is how conventional tank water heaters compare to modern tankless units for a typical Kissimmee home.
Brands We Install
🔥 Navien NPE Series
Our most-installed brand for Kissimmee homes. Navien’s condensing technology extracts nearly all heat from combustion — efficiency ratings up to 0.97 UEF. Built-in recirculation pump option is ideal for larger homes where hot water takes time to reach far fixtures.
⚡ Rinnai RUR / V Series
Rinnai’s V Series is an excellent value for standard homes; the RUR condensing series competes with Navien at the top end. Rinnai has one of the largest service networks in Central Florida, which matters for long-term parts availability.
🔒 Rheem Performance Platinum
Rheem tankless units are a strong option for electric conversions and smaller homes. Their EcoNet Wi-Fi control lets you monitor usage and adjust temperature remotely — popular with vacation rental owners who want remote management capability.
Which brand is right for your home? We recommend based on your gas line size, the number of bathrooms and fixtures running simultaneously, whether you have a recirculation loop, and your budget. We do not push a brand because of margin — we recommend what performs best in Kissimmee’s specific water chemistry and climate conditions.
What’s Included in Every Valmont Tankless Installation
🔧 Load Calculation & Sizing
We calculate your peak simultaneous demand — showers, dishwasher, laundry — and size the unit correctly. An undersized tankless heater is one of the most common installation mistakes we fix for customers who hired non-specialists.
📄 Osceola County Permit
Every tankless installation requires a plumbing permit and, for gas units, a mechanical permit. Both are included in our quote. The signed inspection record protects you on insurance claims and at resale.
📈 Gas Line Evaluation
Tankless heaters demand higher BTU capacity than tank heaters. We inspect your existing gas line and meter, and upsize the supply line if needed. This is non-negotiable for safe, code-compliant operation.
🔒 Proper Venting
Condensing tankless units use PVC venting; non-condensing units require stainless flue pipe. We install the correct vent type for your unit and route it per manufacturer spec — improper venting is a safety issue and voids warranties.
📘 Manufacturer Warranty Registration
We register the unit in your name with the manufacturer at job completion. Navien and Rinnai require installation by a licensed contractor for the full warranty to apply. We provide you the registration confirmation in writing.
🛑 Old Unit Haul-Away
We disconnect, drain, and remove your existing tank or tankless unit at no extra charge on standard replacements. Your utility closet or garage is clean when we leave.
Our Installation Process
Most tankless installations in Kissimmee are completed in one day. Replacements of existing tankless units are typically done in four to six hours.
Tankless Water Heater Cost in Kissimmee
Cost depends on the unit, your home’s gas line capacity, existing venting, and whether we’re replacing a tank or an older tankless. Here is what most Kissimmee homeowners pay for a complete supply-and-install.
All quotes include the unit, all labor, permits, and haul-away of the old heater. Call (407) 881-2944 for a no-pressure written estimate at your home.
🏠 Serving Kissimmee & Osceola County Homeowners
We install tankless water heaters throughout Osceola County and southern Orange County: Kissimmee, St. Cloud, Narcoossee, Celebration, Windsor Hills, Reunion Resort, Champions Gate, Buena Ventura Lakes, Poinciana, Hunters Creek, and the Four Corners area.
Vacation rental and investment property owners: tankless heaters are one of the highest-ROI upgrades for short-term rentals. No cold-shower complaints, lower utility bills between stays, and a longer lifespan than any tank. We work with property managers throughout the US-192 corridor and coordinate installations around guest bookings.
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David did amazing job today at reasonable prices .he responded all my texts right away .he was on time like he said and fix everything what's need to be done .we found our plumber and will be using him again.thanks david
Monika Miller
June 19, 2024Great business. Super customer support. Showed up on time. Worked quietly and efficently. Highly recommend Sonik Services.
James Garrett
July 2, 2024Excelente equipo de trabajo en plomeria , responsable , cumplidos , trabajo limpio , recomendados 100%
Kids Zone Learning Academy
September 16, 2024 -
David did an excellent job in our plumbing isssues and he is very professional with great communication skills
Shane Varghese
July 22, 2024David did an excellent job of vinyl pan replacement at my customers house. It was the first time I hired his services and I will definitely call him for new work. Thanks a lot David!
Daniel Alves
May 31, 2024Awesome service quick and cheap. David is awesome
raul horruitiner
July 8, 2024 -
We had a backup of our main line on a Saturday (talk about an emergency situation), with waste backing up into our first floor shower. The team at Sonik were the most responsive, willing and able to help us out! I would definitely recommend them, they are professional, friendly and reasonable. No hesitation calling them back for any future plumbing needs.
Kel H
May 15, 2024David is quick, professional, and reasonably priced. He answered all of our questions and was willing to give an upfront price for installing a new water heater. I highly recommend using him.
Grace De Salvo
June 14, 2024Very professional and did excellent work, even followed up the next day.
Diane Hamburger
May 1, 2024
Tankless Water Heater FAQs
Tankless Installation Service Areas
We install and service tankless water heaters throughout Osceola County and surrounding Central Florida communities.
St. Cloud
Celebration
Reunion Resort
Champions Gate
Poinciana
Windsor Hills
Hunters Creek
Four Corners
Narcoossee
ZIP Codes: 34741, 34742, 34743, 34744, 34746, 34747, 34769, 34771, and surrounding areas.
Get a Free Tankless Water Heater Estimate
We will assess your home, recommend the right unit, and give you a written itemized quote — no pressure, no obligation. Most estimates are completed same visit.
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We had a backup of our main line on a Saturday (talk about an emergency situation), with waste backing up into our first floor shower. The team at Sonik were the most responsive, willing and able to help us out! I would definitely recommend them, they are professional, friendly and reasonable. No hesitation calling them back for any future plumbing needs.
May 15, 2024David did amazing job today at reasonable prices .he responded all my texts right away .he was on time like he said and fix everything what's need to be done .we found our plumber and will be using him again.thanks david
June 19, 2024David did amazing job working with my plumber issue. First he came to my house for free estimate then he gave me a price for the job. He didn’t give me a bad impressions coz he price the job and not like other companies they charge too expensive. The price is good for me and he did great job and finished it on time. I would rate him 5/5 and 100% that i will recommend him to my friends and family.
Jm Madrinan
June 2, 2024 -
Awesome service quick and cheap. David is awesome
July 8, 2024Excelente equipo de trabajo en plomeria , responsable , cumplidos , trabajo limpio , recomendados 100%
September 16, 2024Pleasantly surprised a well-mannered young man arrived on time for my toilet repair. He was fast & articulate. Good job !!👍 Johnnie & Tanya Meola
Ruth Chang
June 7, 2024 -
David is quick, professional, and reasonably priced. He answered all of our questions and was willing to give an upfront price for installing a new water heater. I highly recommend using him.
June 14, 2024Great company! David was awesome! He was very professional and responsive. I had a plumbing issue on Saturday morning and was hard to find somebody to go out over the weekend. I contacted him, in an hour he was out at the site and fixing the issue! Very impressed with the service I received!
Sandi Ghobrial
July 1, 2024Very professional and did excellent work, even followed up the next day.
May 1, 2024
Valmont Build & Mechanical Group
Tankless Water Heater Installation — Kissimmee, FL
License #CFC1434208