Does my home in Lenexa need a gas line upgrade for a tankless water heater?

Many do. Standard tank water heaters use 30,000 to 40,000 BTU gas input. A residential condensing tankless unit typically requires 150,000 to 200,000 BTU. If the existing gas line to your water heater location is a standard half-inch line, it almost certainly cannot support a tankless unit at full demand without upsizing. We assess the gas supply during the pre-installation consultation and include any required line work in our quote.

Do I need to descale my tankless water heater every year?

In Johnson County water, yes. WaterOne supplies moderately hard water at roughly 7 to 9 grains per gallon. At this hardness level, annual descaling of the heat exchanger is necessary to prevent scale accumulation from degrading efficiency and eventually causing heat exchanger failure. We install flush ports on every tankless installation specifically to make annual descaling straightforward. See our tankless repair page for more on the maintenance process.

Can I convert my tank water heater location to tankless without a major renovation?

Often yes, with the understanding that gas line and venting modifications are typically required. The tankless unit is wall-mounted and does not need the floor space the tank occupied. The main variables are whether the gas line can support the higher BTU requirement and whether a suitable venting path exists for the new unit. We assess both during the pre-installation visit.

Are there tax credits or rebates available for tankless water heater installation in Kansas?

Federal tax credits for energy-efficient water heaters have been available under the Inflation Reduction Act, potentially covering up to 30% of the cost of qualifying condensing tankless units. Evergy and some other utilities periodically offer rebates on qualifying high-efficiency water heating equipment. Available programs change from year to year; ask about current incentives during your consultation.

How does tankless water heater installation connect to the rest of my plumbing?

The tankless unit replaces your existing water heater on the cold water supply and hot water distribution lines, using the same connection points. It requires its own dedicated venting (separate from the old flue in most cases) and typically a dedicated gas line. The rest of your plumbing system is unaffected. If your home has older galvanized or corroded supply lines near the water heater location, we will note that during the installation assessment.

Tankless Water Heater Installation

Tankless Water Heater Installation in Johnson County and Beyond

Get hot water when you need it without keeping a large storage tank running around the clock. A tankless water heater heats water on demand, freeing up space and eliminating standby heat loss, reducing water-heating energy consumption by 24% to 34% for most households compared to a standard tank unit. They also last significantly longer: 20 or more years with proper maintenance, compared to 8 to 12 years for a standard tank.

Lutz Plumbing, Inc. provides tankless water heater installation throughout Johnson County and the Kansas City metro, handling the process from initial consultation through completed startup and code compliance. Master plumbers handle every water heater installation, evaluating your home’s existing plumbing, gas or electrical setup, water supply, and hot water needs to determine the right system for your home.

Schedule Your Tankless Installation

Need Tankless Water Installation? Call (913) 631-2667

When to Choose a Tankless Water Heater?

A tankless water heater is a fantastic upgrade, but understanding the practical considerations helps clarify if it fits your home’s goals:

Upfront Investment vs. Long-Term Value

A tankless installation typically costs $1,500 to $3,500 more than a standard tank replacement. However, lower monthly energy bills and an extended 20-year service life deliver positive long-term value for homeowners staying in their homes.

Gas Line & Utility Requirements

High-efficiency gas tankless units require a larger, instant burst of fuel when turned on. Many older homes in Lenexa, Overland Park, and surrounding Johnson County neighborhoods have 1/2-inch gas lines that need a quick upgrade to 3/4-inch line work to support full hot water demand.

Simultaneous Demand & Peak Winter Temps

A single residential condensing tankless unit has a maximum flow rate of roughly 7 to 11 gallons per minute (GPM). In winter, local groundwater temperatures drop significantly. A properly sized unit ensures you can run a shower and a load of laundry simultaneously without experiencing a drop in hot water output or pressure.

Reclaiming Utility Space

Wall-mounted tankless units completely eliminate the floor footprint of a 40- or 50-gallon tank in your utility room, basement, or garage.

Tank vs. Tankless: A Direct Comparison

Feature	Standard Tank Water Heater	Condensing Tankless System
Expected Lifespan	8–12 Years (7–9 without maintenance)	20+ Years (with proper maintenance)
Hot Water Supply	Limited to Tank Volume (40–50 Gallons)	Continuous / Unlimited On-Demand
Annual Energy Use	Higher (20%–30% Standby Heat Loss)	Lower (Eliminates standby loss; saves ~80–150/yr)
Space Required	Large Floor Footprint	Compact, Wall-Mounted
Maintenance	Tank Flushing	Annual Heat Exchanger Descaling

Gas and Electric Tankless Water Heater Options

Both gas and electric tankless systems provide hot water on demand, but their utility requirements differ significantly:

Gas Tankless Water Heaters

Gas tankless water heaters can be a good option for homes with higher hot water demand and an appropriate gas supply. However, the gas line needs to be capable of delivering the unit’s required input.

If your existing gas line is undersized, an upgrade may be necessary. Proper venting is also required, depending on the unit and installation configuration.

Electric Tankless Water Heaters

Electric tankless water heaters do not require a gas line, but they do require adequate electrical capacity. Before installation, the home’s electrical system should be evaluated to determine whether it can support the heater’s requirements.

The right choice depends on your home’s existing utilities, hot water needs, available space, and overall installation requirements.

Converting Your Existing Tank Water Heater to Tankless

Replacing a traditional water heater with a tankless system does not require a major renovation. In most homes, your existing utility closet, basement nook, or garage location can easily be converted to accommodate a wall-mounted unit.

During our pre-installation visit, we evaluate your existing utility connections, venting paths, and water lines to determine any required modifications. Converting to tankless not only upgrades your hot water performance, but it also frees up valuable floor space previously occupied by a bulky 40- or 50-gallon tank.

Plan Your Tankless Conversion

Instant Hot Water & Local Maintenance

Recirculation Systems: No More Waiting at the Tap

A common question homeowners ask is about the brief delay while cold water standing in the pipes clears out. For larger homes with long pipe runs, we install recirculation systems (built-in or external) that keep warm water primed near your fixtures so you get hot water right away.

Water Hardness & Annual Descaling

WaterOne supplies Johnson County with moderately hard water (7 to 9 grains per gallon). Over time, dissolved minerals can build up inside the heater.

To keep your system running smoothly without hassle:

Flush Ports Included

We install isolation valves and flush ports on every unit so routine maintenance is quick and clean.

Lutz Loyalty Club

Enrolling in our maintenance program covers your annual descaling service automatically, protecting your investment for its full lifespan.

Professional Tankless Water Heater Installation

Installing a tankless unit requires specialized plumbing, gas, electrical, venting, and permitting work. Lutz Plumbing, Inc. handles the complete scope of the installation with licensed master plumbers:

Pre-installation assessment of gas line capacity, venting routes, electrical power, and water supply.
Unit selection based on your household’s peak GPM hot water demand.
Gas line sizing, modifications, and code-compliant plumbing work.
Direct-venting configuration (sealed PVC intake and exhaust).
Thermal expansion tank and condensate neutralizer installation where required by local code.
Installation of isolation valves and flush ports for future maintenance.
Full startup, system commissioning, and temperature verification.
Permit coordination with Johnson County or local city jurisdictions.

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Frequently Asked Questions

How Much Does Tankless Water Heater Installation Cost In Kansas City?

A complete tankless installation typically ranges from $2,000 to $4,500+ installed, depending on the unit type, BTU output, brand, venting complexity, and whether a gas line upgrade is required. Lutz provides a clear, written quote following an in-home assessment.

Does My Home In Lenexa Or Overland Park Need A Gas Line Upgrade?

Many do. Standard tank heaters use 30,000 to 40,000 BTU, whereas a residential condensing tankless unit requires 150,000 to 200,000 BTU. If your existing line is a standard 1/2-inch line, it usually must be upsized to 3/4-inch to handle full load demand.

How Long Does Tankless Water Heater Installation Take?

A standard replacement takes approximately 4 to 6 hours. Installations requiring major gas line upgrades, electrical work, or complex vent rerouting may take a full day.

What Brands Of Tankless Water Heaters Does Lutz Install?

We install all major residential tankless brands including Rinnai, Navien, Rheem, Bradford White, and A.O. Smith. In the Kansas City market, Rinnai and Navien are the most commonly specified condensing units. We will discuss brand and model options that fit your home’s BTU requirements, usage patterns, and budget.

Are There Tax Credits Or Rebates Available For Tankless Water Heaters In Kansas?

Federal energy-efficiency tax credits under the Inflation Reduction Act can cover up to 30% of qualifying condensing tankless installation costs. Local utilities like Evergy also periodically offer equipment rebates. We will review active incentive options during your consultation.

Can I Convert My Existing Tank Water Heater Location To Tankless?

Yes. In most cases, the existing water heater closet or space can be converted to accommodate a wall-mounted tankless unit once necessary gas line, venting, and plumbing adjustments are made.