33% OFFPowerful Hot Water.
Without the Tank.
Upgrade your home with the Rinnai RX199iN — a high-capacity tankless water heater delivering up to 199,000 BTU and up to 11.1 GPM.
Ships in 3–7 Business Days
- High-capacity tankless design
- Up to 11.1 GPM
- 199,000 BTU
- Secure checkout
VerifiedEndless hot water for our whole family
With three teenagers in the house, the old tank could never keep up. Since installing the RX199iN, we've run two showers and the dishwasher at the same time without a single cold surprise. Wish we'd upgraded years ago.
VerifiedCompact and surprisingly quiet
We freed up a corner of the garage by ditching the bulky tank. The unit mounted cleanly on the wall and is much quieter than I expected. The 120°F setting is perfect for our morning routine.
VerifiedSolid build and a fair price
The condensing design feels well made and the stainless steel heat exchanger gives me confidence it'll last. At $999 it was a fair deal for a 199,000 BTU unit. Professional install went smoothly.
Still Running Out of Hot Water?
Cold Showers
Traditional tank systems can run out of stored hot water during periods of high demand.
Limited Capacity
Multiple showers and appliances can compete for the available hot water.
Bulky Storage
Traditional tanks require dedicated space for a large storage tank.
There's a Better Way.
Meet the Rinnai RX199iN
High-capacity tankless water heating designed to deliver hot water on demand.
199,000
BTU
High heating capacity
11.1
GPM
High flow rate under appropriate conditions
0.98
UEF
High efficiency
Tankless
Design
Heats water on demand
Built for Real American Homes
Six reasons homeowners upgrade from a traditional tank to the RX199iN.
Endless Hot Water
Water is heated on demand rather than stored in a traditional tank.
High Output
Up to 11.1 GPM under specified conditions.
199,000 BTU
Designed for high residential hot-water demand.
Space Saving
Tankless design eliminates the need for a large storage tank.
High Efficiency
Condensing technology helps improve efficiency.
Modern Design
Compact, premium-looking equipment for modern homes.
Traditional Tank vs. Rinnai RX199iN
A straightforward look at how the two approaches differ.
Everyday Performance
Hot Water That Keeps Up With Your Home
High-capacity tankless heating for households that use hot water throughout the day.
Engineered for Modern Homeowners
Why homeowners choose an established tankless water-heater manufacturer.
Stainless steel heat exchanger · Condensing design
Engineering Focus
Rinnai is a recognized manufacturer specializing in gas water-heating equipment for residential use.
Tankless Technology
Condensing tankless design heats water as it flows, instead of maintaining a heated storage volume.
High-Capacity Performance
The RX199iN is rated up to 199,000 BTU and up to 11.1 GPM for demanding residential applications.
Built for Residential Use
Designed and specified for home installations, with efficiency rated up to 0.98 UEF.
Product Specifications
Technical details for the Rinnai RX199iN.
- Model
- RX199iN
- Fuel
- Natural Gas
- Maximum Input
- 199,000 BTU
- Maximum Flow
- Up to 11.1 GPM
- Efficiency
- Up to 0.98 UEF
- Technology
- Condensing Tankless
- Application
- Residential
Always verify local installation requirements and current manufacturer specifications before purchase.
Professional Installation Recommended
A gas tankless water heater requires correct gas supply, venting, water connections and electrical work. Have a qualified professional confirm requirements and local code compliance for your home.
Choose Your System
Select the RX199iN for your home.
Consult a Professional
Confirm gas, venting, water and electrical requirements.
Enjoy On-Demand Hot Water
Experience high-capacity tankless performance.
Upgrade Your Home's Hot Water for $999
High-capacity tankless performance for modern American homes.
Rinnai RX199iN
- Secure checkout
- Shipping information
- Customer support
- Return policy
Shipping, returns and support terms follow your store's published policies.
Secure Checkout
Encrypted payment processing at checkout.
Customer Support
Mon–Fri, 9am–6pm ET · +1 (419) 405-6809 · support@rinnaiwaterheater.shop
Product Information
Full specifications listed above.
Shipping Information
Free freight on this order within the contiguous United States. Orders typically ship within 1–2 business days.
Return Policy
Returns accepted within 30 days of delivery in original condition. Contact support@rinnaiwaterheater.shop to start a return.
Frequently Asked Questions
Product details, installation requirements and store policies.
33% OFF · Save $501
Ready for Hot Water That Keeps Up?
Upgrade to the Rinnai RX199iN and get high-capacity tankless performance for $999.