Tankless Water Heater Installation in Longmont, CO
Say goodbye to cold showers in Longmont, CO. Our experienced team at GFR Plumbing specializes in tankless water heater installation, offering a modern solution for your hot water needs.
- Same-Day Estimates Offered
- Gas Line Upgrades Handled
- Descaling Valves Installed
- Quick, Efficient Installation
Switch to Tankless Hot Water in Longmont, CO.
Reach out to GFR Plumbing today for a free consultation and discover the benefits of a new tankless system.
Expert Tankless Water Heater Installation for Longmont, CO Families
GFR Plumbing focuses on professional tankless water heater installation for homeowners across Longmont, CO. We help you move from traditional tank-style heaters to modern, energy-efficient tankless units that provide hot water whenever you need it.
Our expertise includes:
- Gas line upsizing and meter capacity checks for high BTU demand
- Isolation valve kits and scale filters for hard water protection
- Accurate sizing and model selection for your home.

Additional Plumbing Installation Services in Longmont, CO
We install water heaters, pumps, lines, and fixtures across Longmont, CO with precision workmanship that meets every local code.

Customers
Why Choose GFR Plumbing for Tankless Water Heater Installation in Longmont, CO?
A tankless water heater only performs if it is sized, vented and supplied correctly. We do the math on flow rate, temperature rise and gas load before recommending a model.
- Scale Protection, Isolation valves and scale filters guard the heat exchanger from hard water.
- Endless Hot Water, Never run out of hot water again, even with multiple showers or appliances running at once.
- Space Saving, These compact units free up valuable floor space, often installed on a wall or in a small utility closet.
Citywide Coverage
No matter where your home is in Longmont, we can plan a tankless install that fits your layout and gas service. We also handle conversions from attic tanks to wall-mounted units.
Experienced Team
Our plumbers are trained on major tankless brands and understand how each handles venting, condensate and gas pressure. They configure settings and recirculation options on site.
Safety-First Approach
Tankless units must be vented correctly to remove combustion gases safely, and we follow manufacturer clearance and termination requirements. Condensing units get a proper condensate drain and neutralizer when required.
Trusted Certified Longmont Plumbing Services Professionals
At GFR Plumbing, we take pride in providing licensed, certified plumbing services throughout Longmont, CO. Backed by leading industry credentials, our experienced plumbers combine technical skill with genuine customer care. Whether it is repair, installation, or maintenance, we follow strict safety and quality standards to deliver long-lasting results you can trust.
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PHCC Plumbing Contractor Recognition
Better Business Bureau (BBB) Accreditation
Angi Certified Pro
ISO 9001 Quality Management CertificationReliable Tankless Water Heater Installation Services in Longmont, CO
Tankless Water Heater Relocation in Longmont
Sometimes the ideal spot for a tankless water heater is not where your old tank was located. For homeowners in Longmont looking to free up space or improve access, GFR Plumbing offers professional tankless water heater relocation. This can involve rerouting gas or water lines and possibly electrical work, all handled with precision and to local codes by our experienced team.

Upgrading from Tank to Tankless in Longmont, CO
Making the switch from a traditional tank water heater to a tankless system involves more than just swapping units. It often requires changes to gas lines, electrical wiring and venting. GFR Plumbing manages all aspects of this conversion, making sure all upgrades meet current codes and your new tankless unit performs at its best, giving you a modern hot water solution in Longmont, CO.
Commercial Tankless Water Heater Services in Longmont, CO
Businesses in Longmont benefit from the continuous hot water supply and compact design of commercial tankless water heaters. From restaurants to hair salons, we install heavy-duty systems designed to meet high-demand commercial needs. GFR Plumbing understands the requirements for commercial installations, including larger capacity units and commercial plumbing codes, so your business never runs out of hot water.
Hard Water Protection for Tankless Units in Longmont, CO
Calcium scale is the most common cause of tankless heater failure. Around Longmont, a yearly water heater flush helps clear the sediment that collects at the bottom of the tank. Scale coats the heat exchanger, reducing efficiency and triggering error codes. We install isolation valves so the unit can be flushed with a vinegar or descaling solution once a year. A scale inhibitor cartridge or whole-home softener provides extra protection.
Rinnai Tankless Water Heater Installation in Longmont, CO
Rinnai tankless water heaters are a top choice for their reliability and long lifespan, making them a smart investment for homeowners across Longmont, CO. Our plumbers are factory-trained on Rinnai systems, delivering a clean installation that follows all manufacturer specifications. We make sure gas line sizing, venting and water connections are correct so your Rinnai unit provides endless hot water efficiently for years.
Tank to Tankless Conversions in Longmont
Converting from a tank requires more than swapping units. A 40 gallon tank heater uses roughly 40,000 BTU, while a whole-home tankless unit may need up to 199,000 BTU, so the gas line usually needs to be upsized. Venting changes from a metal flue to PVC or stainless, and the unit moves to a wall location. We remove and haul away your old tank and patch the old flue penetration.
Electric Tankless Water Heater Installation in Longmont, CO
Electric tankless water heaters are an excellent option for homes in Longmont where natural gas is not available or preferred. These units are often smaller, simpler to vent and can be installed closer to the point of use. GFR Plumbing provides expert electrical sizing to make sure your home's panel can safely support a new electric tankless unit, offering consistent hot water without the need for a gas line.

Tankless Water Heater Replacement in Longmont, CO
If your old tankless unit is failing or you are upgrading from a traditional tank, GFR Plumbing offers seamless tankless water heater replacement. We carefully remove the old unit, make any needed adjustments to plumbing and venting and install your new, more efficient model. Our goal is to make the transition as smooth as possible, keeping continuous hot water in your Longmont, CO home.
Tankless Water Heater Installation Near Me in Longmont, CO
When you search for 'tankless water heater installation near me' in Longmont, CO, GFR Plumbing is your dependable local choice. We know the local plumbing and building codes thoroughly, so every installation is done right the first time.
When you search for 'tankless water heater installation near me' in Longmont, CO, GFR Plumbing is your trusted local expert. We know the plumbing and homeowner needs throughout the area, providing prompt and personalized service right to your doorstep.
GFR Plumbing at a Glance
- Fully licensed plumbing team covering Longmont, CO
- 24/7 emergency service with same-day scheduling
- Upfront, flat-rate pricing before work begins
- 4.8-star rated by 750+ Colorado customers
Longmont Map
Longmont Information
- Population
- 98,630
- Area codes
- 303/720/970
- Service area
- Longmont and communities within 40 miles
- Nearby
- Lafayette, Boulder, Broomfield, Loveland
Incoming water temperature shapes how a tankless unit performs in Longmont, CO, and hard water makes proper installation with descaling valves essential for a long service life.
Expert Services
Trust our professionals for reliable GFR Plumbing solutions in Longmont, CO.
Our Specialized Plumbing Services in Longmont, CO
At GFR Plumbing, we provide a complete range of plumbing services across Longmont, CO. From leak detection to full system installations, our team ensures fast, precise, and affordable service for both residential and commercial properties. Explore our core services below:
How Our Tankless Water Heater Installation Process Works in Longmont, CO
Our tankless water heater installation process in Longmont is designed to be simple and efficient, from your first call to enjoying endless hot water.
Request a Quote
Contact GFR Plumbing at (720) 727-9398 to schedule a free consultation. We will discuss your hot water needs and assess your home's specific requirements for a tankless system.
On-Site Assessment
Our expert plumber will visit your Longmont home to evaluate your current setup, determine the best tankless model and provide a detailed, transparent estimate.
Professional Installation
Once approved, our certified technicians will install your new tankless water heater, making sure all gas, water and vent connections are up to code and fully functional.
Frequently Asked Questions About Tankless Water Heater Installation in Longmont
Most gas tankless installations cost $3,000 to $6,500 including the unit, labor, venting and typical gas line upgrades. Electric units can be less, though panel upgrades can add $1,000 to $3,000.
In Colorado, plumbing and often gas or electrical permits are typically required for tankless water heater installation. GFR Plumbing handles all required permit applications and makes sure your installation passes all required inspections by local authorities.
Tankless water heaters offer several key benefits: endless hot water on demand, significant energy savings from heating water only when needed, a longer lifespan (often 20+ years) and a compact, space-saving design. They also lower the risk of tank leaks and the water damage that comes with them.
A standard tankless water heater installation, replacing an existing tank, typically takes 4 to 8 hours. If extensive plumbing or gas line changes are required, it may take a full day. Our team works efficiently to restore your hot water as quickly as possible.
While it may seem appealing, tankless water heater installation is complex and should only be performed by a licensed professional. It involves gas lines, high-voltage electricity, water connections and detailed venting systems, all of which require specialized knowledge and adherence to safety codes. Incorrect installation can be dangerous and cancel warranties.
Tankless units eliminate standby heat loss, which can reduce water heating energy use. Savings vary based on household size and usage habits.
No, we strongly advise against DIY tankless water heater installation. These systems involve complex connections for gas, water and electricity, along with specific venting requirements. Improper installation can lead to safety hazards, void warranties and costly repairs. Always hire a licensed professional.
We install Rinnai, Navien, Noritz and Rheem tankless water heaters. Each brand offers different features, efficiency levels and warranties.
What People Are Saying About Our Plumbing Experts?

Daniel K.
A pipe burst at 11 pm and they actually answered. The plumber showed up within the hour, shut everything down, and had us back to normal the next morning. Could not ask for more.
Emergency Plumbing · Longmont, CO
Patricia H.
We had a slab leak that two other companies could not find. GFR Plumbing located it in under an hour, explained our options, and the price matched the quote to the dollar.
Slab Leak Repair · Boulder, CO
James P.
Our commercial plumbing system had a leak under the sink, and GFR Plumbing handled it professionally. The plumbers arrived quickly and restored everything without disruption to our customers.
Commercial Plumbing · Boulder, CO
Robert G.
The trenchless sewer replacement saved our front yard. They walked us through the camera inspection footage first so we knew exactly what we were paying for.
Sewer Line Replacement · Broomfield, CO
Laura S.
I scheduled a water heater replacement, and the team made the process smooth and affordable. The new unit works perfectly, and they cleaned up after completing the job.
Water Heater Replacement · Longmont, CO
Mark T.
When our office needed drain cleaning, GFR Plumbing provided quick, reliable service. The plumber arrived on time and made sure every drain flowed perfectly before leaving. Very satisfied.
Drain Cleaning · Longmont, CO













