Super High Efficiency 7.5 GPM Residential 160,000 BTU Natural Gas Interior Tankless Water Heater
- Enjoy endless hot water
- Less space for heating gives you more space for living
- Professional installation recommended; please call 833-746-6210
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Product Details
About This Product
Welcome to ultimate efficiency. With technology that operates only when hot water is needed, super-efficient heating coils, no pilot light and no storage tank to heat and reheat water, you save on energy and utility costs. In fact, Rinnai Tankless Water Heaters use up to 40% less energy than a traditional tank water heater. Plus, with premium technology, increased energy efficiency, an improved Home Energy Rating System (HERS) Index Score and optimized LEED eligibility, our tankless solutions can increase your home's value. You can even qualify for energy efficiency rebates and tax credits. It's a smart investment for now and the future.
Highlights
- Save time with hot water whenever and wherever you need it, any size home, even for simultaneous uses at multiple fixtures
- Save energy and reduce utility costs by operating only when hot water is needed
- Maximum output, minimum space; suitable for installation in non-traditional spaces such as crawl spaces and attics
- Multiple venting options available including PVC/CPVC using the Ubbink concentric to twin pipe adaptor allow for an easy installation
- Automatic frost protection
- Residential warranty: limited 12-year on heat exchanger, 5-year on parts, 1-year on labor (5-year optional on labor); commercial warranty: limited 5-year on heat exchanger, 5-year on parts, 1-year on labor (2-year optional on labor)
- Rinnai is changing the language in its warranty terms and conditions found in the current User Installation manuals; The existing statement will be replaced by the following: "This Limited Warranty applies only to products that are installed in the United States and Canada. Improper installation may void this Limited Warranty; It is recommended that a trained and qualified professional who has attended a Rinnai installation training class complete your installation" All warranties (old or new manual) will be honored as written above
- You can be confident in choosing to install Rinnai tankless technology in your home; our commitment to quality has made us the #1 selling tankless water heating brand in North America; your family deserves nothing less
- Professional installation recommended; please call 833-746-6210
- Rinnai branded accessories will ensure optimal performance of your Rinnai Tankless Water Heater.
- For compatible isolation valve kit see Rinnai #MIVK-T-LW
- Click here for more information on Electronic Recycling Programs
- Return Policy
- California residentssee Prop 65 WARNINGS
Product Information
Additional Resources
Shop All RinnaiSpecifications
Dimensions: H 26 in, W 18.5 in, D 10 in
Dimensions
Product Depth (in.) | 10 in |
|---|---|
Product Height (in.) | 26 in |
Product Width (in.) | 18.5 in |
Water Connection Size (in.) | 3/4 |
Details
Application Type | Residential |
|---|---|
BTU Rating | 160000 Btu |
Efficiency Level | High |
First Hour of Delivery (gallons/hr) | 270 |
Flow Rate @ 35°F Rise (gallons/min) | 7.5 gal (US)/min |
Flow Rate @ 45° Rise (gallons/min) | 6.7 gal (US)/min |
Gas Connection Size | 3/4" MNPT |
Gas Type | Natural Gas |
Indoor/Outdoor | Indoor |
Maximum Flow Rate (gallons per minute) | 7.5 |
Number of Showers | 1-3 |
Product Weight (lb.) | 70 lb |
Required Volt Connection | 120 volt |
Returnable | 90-Day |
Total BTU (Btu) | 160000 Btu |
Uniform Energy Factor | 0.9 |
Water Heater Features | Freeze Protection, Overheat Protection, Ultra LoNox, Wall Mounted, WiFi |
Water Heater Type | Gas |
Warranty / Certifications
Certifications and Listings | CSA Listed |
|---|---|
Part Warranty | 5 Year |
Questions & Answers
Is this a non-condensing or condensing unit?
Hello AJPurnell, The RUCS65iN is a condensing unit.
does it have a drain
Hi jess, this unit does not have an internal drain but will require a condensate drain as part of the installation. This model is a condensing unit, which means it generates condensate during operation that needs to be properly drained away to prevent damage
Average cost to install a gas water heater
Hi Claude, we are unable to provide pricing as it varies depending on the region. You can always call around and see about companies that offer free in-home assessments with a quote for installation in your area.
how fast can i get hot water
Hi Many, it can vary by the distance from unit to the fixture you are using. It could take 30-60 seconds and in rare cases up to 5 minutes. However, once you get hot water it will be endless. Recirculation can almost instant hot water by allowing the unit to preheat the water utilizing the existing plumbing.
Does this need a gas regulator and if so what kind
Hi Tereasa, yes our tankless water heaters typically requires a gas regulator to ensure safe and consistent gas pressure. For this type of high-efficiency tankless water heater, a 2-stage gas regulator is often recommended, which provides a more stable pressure suitable for high-demand appliances. The required gas pressure specifications should be noted in the heater’s manual, but most natural gas units operate within a pressure range of 4–10 inches water column (WC). Always consult our product manual or a licensed professional for exact regulator type and installation guidance to ensure proper performance and safety.
Can I use the exhaust flue from the hot water tank i removed that runs up and out the roof
Hi Robert, we recommend you confirm with your installer and in our manual. Most existing venting will not be compatible with our units.
Which models can function at 8500 ft altitude?
Hi Offgrid, all our current tankless models can work at up to 10,200 ft
What is the estimated cost per year for Madison WI for this appliance?
Hi Nick the estimated cost per year for this unit is $206.
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Customer Reviews
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Customer review from avidratings.comCustomer review from avidratings.comCustomer review from avidratings.comCustomer review from avidratings.comOur chat team is available to assist with general questions, pro recommendations, warranty inquiries, Wi-Fi support, and product recommendations. You can reach us via the chat feature on rinnai.us Monday through Friday, 8 AM–8 PM EST. For licensed professionals, our technical support team is available 24/7 at 1-800-621-9419.
We appreciate your feedback and hope to provide you with the support you nee
To address your concerns, I recommend reaching out to our live chat team on the Rinnai.us portal. A REAL person can respond within minutes. They can review your case in detail, provide real-time assistance, and work to resolve this matter as quickly as possible.
Your satisfaction is very important to us, and we’re here to help ensure your unit operates as it should.
Customer review from avidratings.com
