Rinnai SE Series 6.5 GPM Indoor Condensing Tankless Water Heater – Natural Gas
Rinnai SE Series 6.5 GPM Indoor Condensing Tankless Water Heater – Natural Gas is backordered and will ship as soon as it is back in stock.
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Price Match Guarantee
Price Match Guarantee
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Please Note: Some Exclusions May Apply
Delivery and Shipping
Delivery and Shipping
Your order processing time is 1 to 2 days. Please note that the cut-off time for order placement is 6 p.m. Orders received after this time will be processed on the following business day.
Your order will arrive within 4 to 7 days on average (free shipping over $200). Shipping for orders under $200 incurs a flat fee of $15. We currently offer shipping only within the continental United States (island deliveries may incur additional costs); international shipping is not available.
Mostly all of our orders are shipped via one of our third-party freight carriers (18-wheeler). If your order has an item that is shipped on a freight carrier, you will be contacted to schedule a curbside delivery time. Please make sure to put the correct phone number at checkout.
Upon placing your order, you will receive a confirmation e-mail. This message will confirm your order has been received by our system, and your credit card was approved for purchase. We will not charge your card until the item has shipped unless it's back ordered and we need to hold an item for you.
As soon as your order is received on our end, we process it!
Rinnai SE Series 6.5 GPM Indoor Condensing Tankless Water Heater – ...
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• We Beat The Lowest Price
• Fast 4-7 Day Delivery
• Manufacturer Warranty Included
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Description
Description
Upgrade your home’s hot water system with the Rinnai SE Series 6.5 GPM Indoor Condensing Tankless Water Heater. Designed for efficiency, reliability, and convenience, this natural gas-powered unit delivers endless hot water for your household. With Wi-Fi readiness and remote diagnostics, you can monitor and control your water heater from anywhere. Perfect for homes with 2–3 bathrooms, it combines advanced technology with an energy-saving design to meet all your hot water needs.
Key Features:
- Wi-Fi Ready for remote monitoring and control
- Supports remote diagnostics and maintenance for hassle-free service
- ENERGY STAR® Certified for maximum energy efficiency
- 2x longer service life compared to standard water heaters
- Hot water capacity from 0.26 GPM to 6.5 GPM
- Powerful 130,000 BTUs for consistent heating
- Serves 2–3 bathrooms simultaneously
- Easy installation with flexible venting options
- Sleek, compact design fits indoor spaces
- Compatible with other Rinnai Tankless models as an accessory
What’s Included![]()
- Rinnai SE Series 6.5 GPM Indoor Condensing Tankless Water Heater (Natural Gas)
- Installation and venting accessories (as per model requirements)
- User manual and warranty documentation
Specifications:
| Specification | Details |
|---|---|
| Model Number | RUCS65IN |
| Fuel Type | Natural Gas |
| Hot Water Capacity | 0.26 GPM – 6.5 GPM |
| BTU Output | 130,000 BTUs |
| Uniform Energy Factor (UEF) | 0.85 |
| Indoor/Outdoor Use | Indoor |
| Vent Type | Condensing |
| Color/Finish | White |
| Dimensions (H x W x D) | 27" x 18.5" x 10.5" |
| Bathrooms Supported | 2–3 |
| Warranty | Manufacturer’s standard |
Care & Maintenance Instructions
- Regularly inspect the unit and venting for blockages or leaks
- Flush the water heater annually to remove scale buildup and maintain efficiency
- Check gas and water connections periodically for safety
- Follow manufacturer’s guidelines for installation, maintenance, and warranty compliance
Let customers speak for us
The rugged rock-like exterior blends beautifully into our deck design. The seating for six is spacious, and the 10 therapy jets deliver smooth and relaxing streams. Heats quickly and hides all the mechanicals underneath. Totally exceeded our expectations.
much better than our old open fireplace
We love it! It looks very realistic!
Love the tropical vibes it brings to my backyard. Worth every cent. Fast ship and great service.
Peaceful water sound and super easy to maintain.
Looks great in the living room. It puts out really nice flames.
This massive waterfall made our pool feel like a resort. The roar of that cascade is hypnotizing and the finish looks incredibly lifelike. We chose brown rock and it blends perfectly. Installation needed 3 people, but totally worth it.
Does exactly what it’s supposed to do.
Looks incredible in the backyard. Setup wasn’t hard
We sold our wood unit for this, and haven’t looked back. Easy pilots, no mess, looks great
This grill is a beast! Super high quality.
Works well. Sent in a timely manner. Cheapest online too!
Installation was extremely easy. Came with all the equipment needed!
We wanted something tropical, this fit perfectly!
