Last updated: September 24, 2026
What affects the price
When you are looking at the price of a new water heater, a few main things shift the final number. The type of unit you choose—whether it is a tank model or a tankless system—is the biggest factor. You also have to consider the fuel source, like gas or electric, and the physical space where the heater sits. If your home needs new venting, updated piping, or a different hookup to meet current safety codes, that adds labor time to the project.
About this service
Navien systems rely on sophisticated sensors and flow meters to heat water on demand. When an error code appears or the unit fails to fire, a technician must calibrate the system and check for debris buildup in the heat exchanger. You should call us if your unit isn't maintaining temperature or shows a fault code. Exact pricing confirmed free on the call.
Even though it is warm outside, your water heater is still working daily. Summer is a great time to adjust your settings, as the incoming water isn't as cold, which can actually help extend the life of your unit. If you are planning a home renovation or just want to upgrade to a more efficient model, call us to talk through your options.
Frequently asked in St. Louis
How long do Navien tankless water heaters typically last in St. Louis?
Navien tankless water heaters are designed for durability, often lasting 20 years or more with consistent, professional maintenance. In St. Louis, regular flushing to address potential mineral deposits from the local water supply is crucial for extending the unit's lifespan. Proper care ensures optimal performance.
What is the average cost of installing a Navien tankless water heater?
The cost of installing a Navien tankless water heater in St. Louis can vary depending on the specific model and installation requirements. Factors such as existing plumbing, venting needs, and gas line upgrades will influence the final price. A professional assessment will provide an accurate quote.
What is the most efficient type of water heater for a St. Louis home?
Navien tankless water heaters are highly efficient, heating water on demand rather than storing it, which significantly reduces energy waste. This makes them an excellent choice for homeowners in St. Louis looking to lower their utility bills and reduce their environmental impact.
What are signs I need a new Navien tankless water heater?
Look for indicators such as inconsistent hot water temperatures, a significant drop in hot water pressure, unusual noises emanating from the unit, or visible water leaks. If your Navien is older and experiencing frequent issues, it's wise to consider a replacement. These are common signs for a professional check.
What is the most common problem with a Navien tankless water heater?
Mineral buildup from hard water is a frequent concern, especially in areas with consistent water usage. Ignition failures or issues with the electronic controls can also occur. Regular professional maintenance, including descaling, is the best way to prevent these common problems.
Is it worth it to repair a Navien tankless water heater?
Repairing a Navien tankless water heater is often a cost-effective solution, particularly for units that are not excessively old or if the problem is a common, fixable one. A qualified technician can provide an expert opinion on the viability and cost-effectiveness of repairs for your St. Louis home.
Also serving nearby: O Fallon · Springfield · Columbia · Champaign · Peoria
More on this: DOE water heating — efficiency and sizing.
Service area details
Serving all of St. Louis — population 281,754; about 4,565 residents per square mile across 61.7 sq mi.
Neighborhoods served in St. Louis: The Hill, Central West End, Tower Grove, Soulard, CWE — and every surrounding area.
Areas we serve
Browse by state, then city.
Alabama (4)
All of Alabama · Birmingham · Huntsville · Mobile · Montgomery
Alaska (1)
Arizona (9)
All of Arizona · Chandler · Gilbert · Glendale · Mesa · Peoria · Phoenix · Scottsdale · Tempe · Tucson
Arkansas (1)
California (31)
All of California · Anaheim · Bakersfield · Chula Vista · Elk Grove · Fontana · Fremont · Fresno · Garden Grove · Glendale · Huntington Beach · Lancaster · Long Beach · Los Angeles · Modesto · Moreno Valley · Oakland · Oceanside · Ontario · Oxnard · Palmdale · Rancho Cucamonga · Riverside · Sacramento · San Bernardino · San Diego · San Francisco · San Jose · Santa Ana · Santa Clarita · Santa Rosa · Stockton
Colorado (4)
All of Colorado · Aurora · Colorado Springs · Denver · Fort Collins
District of Columbia (1)
Florida (11)
All of Florida · Cape Coral · Fort Lauderdale · Hialeah · Jacksonville · Miami · Orlando · Pembroke Pines · Port St. Lucie · St. Petersburg · Tallahassee · Tampa
Georgia (3)
All of Georgia · Atlanta · Augusta-Richmond County · Columbus
Hawaii (1)
Idaho (1)
Illinois (2)
Indiana (2)
Iowa (1)
Kansas (2)
Kentucky (2)
All of Kentucky · Lexington-Fayette · Louisville/Jefferson County
Louisiana (3)
Maryland (1)
Massachusetts (2)
Michigan (2)
Minnesota (2)
Missouri (3)
Nebraska (2)
Nevada (4)
All of Nevada · Henderson · Las Vegas · North Las Vegas · Reno
New Jersey (1)
New Mexico (1)
New York (4)
All of New York · Buffalo · New York · Rochester · Yonkers
North Carolina (7)
All of North Carolina · Cary · Charlotte · Durham · Fayetteville · Greensboro · Raleigh · Winston-Salem
Ohio (4)
All of Ohio · Akron · Cleveland · Columbus · Toledo
Oklahoma (2)
Oregon (3)
All of Oregon · Eugene · Portland · Salem
Pennsylvania (2)
Rhode Island (1)
South Dakota (1)
Tennessee (6)
All of Tennessee · Chattanooga · Clarksville · Knoxville · Memphis · Murfreesboro · Nashville-Davidson metropolitan government (balance)
Texas (17)
All of Texas · Amarillo · Arlington · Austin · Brownsville · Dallas · El Paso · Fort Worth · Frisco · Garland · Grand Prairie · Houston · Irving · Laredo · Lubbock · McKinney · Plano · San Antonio
Utah (1)
Virginia (5)
All of Virginia · Chesapeake · Newport News · Norfolk · Richmond · Virginia Beach
Washington (4)
All of Washington · Seattle · Spokane · Tacoma · Vancouver
