Kansas City's #1 Rinnai Tankless Water Heater Installer
Endless hot water. Lower energy bills. 20+ year lifespan. As an Authorized Rinnai PRO listed on rinnai.us, JF Denney delivers factory-trained installation, repair, and maintenance across the KC metro — with a warranty that's only valid from an authorized dealer.
Why Homeowners Choose Rinnai Tankless Water Heaters
Rinnai is the #1 selling tankless water heater brand in North America — trusted for endless hot water, energy savings, and industry-leading durability.
Endless Hot Water
Never run out of hot water again. Rinnai tankless water heaters heat water on demand — large families, back-to-back showers, filling a soaking tub — all without waiting for a tank to refill.
Energy Savings Up to 40%
By heating water only when you need it, Rinnai tankless systems eliminate the energy wasted keeping 40-60 gallons constantly hot. ENERGY STAR certified models can save up to 40% on water heating costs compared to a traditional tank.
20+ Year Lifespan
Traditional tank water heaters last 10-15 years. Rinnai tankless units are built to last 20+ years with proper maintenance. Compact wall-mount design saves valuable floor space. SENSEI™ technology provides built-in diagnostics and recirculation capability.
Rinnai Tankless Services We Provide
From new installations to repairs and annual maintenance — JF Denney is your full-service Rinnai tankless partner.
Rinnai Tankless Installation
Professional installation of Rinnai tankless water heaters including gas line sizing, venting, and optional recirculation lines. We handle everything — gas, water, venting, electrical — in one visit. Same-day consultations available.
Tank-to-Tankless Conversion
Ready to ditch the old tank? We remove your existing water heater and install a wall-mounted Rinnai tankless system — including any gas line upgrades needed. We register your unit within 90 days for full warranty coverage.
Rinnai Tankless Repair
Error codes? No hot water? Low flow? Our factory-trained technicians diagnose and repair all Rinnai models — including legacy units. We stock common Rinnai parts for same-day repairs whenever possible.
Annual Maintenance & Descaling
Kansas City's hard water demands annual descaling to keep your tankless running efficiently and your warranty active. Our maintenance agreements include annual flushing, inspection, and filter replacement. Sign up for a maintenance plan →
How Much Can You Save Going Tankless?
A tankless water heater pays for itself through energy savings, longer lifespan, and available tax credits.
The Real Cost of Going Tankless
Yes, a tankless water heater costs more up front than a traditional tank. But when you factor in 40% lower energy bills, a 20+ year lifespan (vs 10-15 for tanks), and available tax credits — most homeowners break even within 3-5 years and save thousands over the life of the unit.
Plus: ENERGY STAR certified Rinnai tankless models may qualify for federal tax credits. Ask us about current eligibility during your free estimate.
Bills
Lifespan
Warranty
Hot Water
Savings estimates based on DOE data for ENERGY STAR certified tankless water heaters vs. standard 50-gallon tank heaters. Actual savings vary by household size, usage, and local utility rates. Contact us for a personalized estimate.
Rinnai Tankless Service Across the KC Metro
Two locations serving six counties. Same-day service available throughout the Kansas City metro.
Leavenworth County
Wyandotte County
Johnson County
Platte County, MO
Jackson County, MO
Cass County, MO
What Our Tankless Customers Say
5.0 stars across 1,076+ verified Google reviews. Here's what KC homeowners say about our tankless installations.
"We eventually went with a tankless system and couldn't be more pleased. JFDenney are always responsive to our needs and work with your busy life to minimize time needed to take off work. This alone is a service rarely seen and is another reason we are loyal customers!"
"Kyle was very attentive to providing us with multiple options available when replacing our hot water heaters. Denay and Jared were great to work with — knowledgeable in the product and trained us in the use of the system."
"Jill and Jared provided the best customer service I've had in years. Jill helped me pick the best system with no pressure, while Jared was the expert installer — so organized, neat, and even replaced some leaky fittings in the existing lines."
Why Choose JF Denney for Your Rinnai Tankless?
JF Denney has been the KC metro's trusted plumbing and water heater experts since 1952. As an Authorized Rinnai PRO listed on rinnai.us/find-pro, we combine Rinnai's industry-leading tankless technology with 70+ years of plumbing expertise that no other local installer can match.
Every Rinnai tankless we install includes proper gas line sizing, venting, and optional recirculation — registered within 90 days for full warranty activation. We also offer annual maintenance agreements to keep your system running efficiently and your warranty active.
Rinnai Warranty Protection
Rinnai offers one of the strongest warranties in the tankless industry — but only when purchased from an Authorized PRO like JF Denney.
Rinnai warranty requires product registration within 90 days of purchase to extend labor coverage to 5 years. JF Denney handles all registration on your behalf. Products purchased from unauthorized dealers or online do not carry a Rinnai warranty. Protect your investment — buy from an Authorized PRO.
Request Your Free Tankless Estimate
Fill out the form below and a JF Denney tankless specialist will contact you within one business day with a personalized estimate — including installation cost, energy savings projection, and warranty details.
Prefer to schedule directly? Book online or call 913-682-2182
Ready for Endless Hot Water?
Free estimates from KC's most experienced Authorized Rinnai PRO. Same-day consultations available. We handle gas line work, installation, registration, and maintenance — all under one roof.