RU199IN was built to provide clear, direct, and practical advice on one of the most popular whole-home gas tankless water heaters: the Rinnai RU199iN.
We compile official manufacturer specs, installer feedback, code guidelines, and real-world owner reviews to help you make informed decisions.
Our goal is to save you time and money by answering technical sizing, gas supply, venting, and maintenance questions without the fluff.
Our Mission
We are committed to building tools that are simple, fast, and accessible to everyone. No unnecessary complexity, no hidden fees, no barriers to entry.
Our Values
- Simplicity — Great tools get out of your way.
- Transparency — No surprises, no hidden terms.
- Accessibility — Built for everyone, everywhere.
- Speed — Every millisecond matters.
Get in Touch
Want to learn more or have questions? Contact our team and we will be happy to help.