Rinnai SE Series 7.5 GPM Indoor Condensing Tankless Water Heater – Natural Gas
- Authorized Online Dealer
- Free Shipping (exclusions may apply)
- We Beat The Lowest Price
- Fast 4–7 Day Delivery
- Manufacturer Warranty Included
- Questions? Call Our Experts: +1 (800) 484-0224
Rinnai SE Series 7.5 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
We work very hard to ensure that we offer the absolute best prices online. If you find another online store that offers a lower price than us, let us know and we beat the price hands down. We want you to feel confident that you are getting the absolute best price for the product you are ordering.
Our 100% Price Match Guarantee has the following restrictions:
Promotions such as rebates and buy one, get one free offers are not eligible
The website can not be a discounter or auction website (ie; eBay, etc..)
The competitor must be an Authorized Retailer of the item you have purchased
The Price Match Guarantee includes will be calculated based on item price, sales tax, shipping charges
Price Matches Do Not Apply For Exchange Orders, or replacements
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 7.5 GPM Indoor Condensing Tankless Water Heater – ...
• Authorized Online Dealer
• Free Shipping + No Sales Tax (exclusions may apply)
• We Beat The Lowest Price
• Fast 4-7 Day Delivery
• Manufacturer Warranty Included
• Questions? Call Our Experts: +1 (800) 484-0224
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Description
Description
Experience endless hot water, superior efficiency, and long-lasting performance with the Rinnai SE Series 7.5 GPM Indoor Condensing Tankless Water Heater – NG. Engineered for reliability and built for modern homes, this ENERGY STAR® certified unit delivers consistent hot water for up to four bathrooms simultaneously, making it ideal for medium to large households.
With advanced Wi-Fi capability, remote diagnostics, and flexible venting options, this model ensures a hassle-free installation and user-friendly operation. Designed to last twice as long as traditional tank-style heaters, it provides exceptional value and performance while reducing energy usage.
Upgrade to a smarter, more efficient hot water solution trusted by homeowners and professionals nationwide.
Key Features:
- Endless Hot Water Supply – Supports 2–4 bathrooms simultaneously
- 7.5 GPM Flow Rate – Consistent performance even during high demand
- Wi-Fi Ready – Optional Wi-Fi module for remote control and monitoring
- Smart Diagnostics – Remote maintenance alerts for optimal performance
- ENERGY STAR® Certified – High-efficiency condensing technology
- Flexible Venting Options – Simplifies installation in most home layouts
- 160,000 BTU Heating Power – Fast and powerful water heating
- Longer Service Life – Lasts 2× longer than standard tank water heaters
- Compact Indoor Design – Saves space and fits utility closets easily
- Uniform Energy Factor (UEF) 0.90 – Helps lower monthly energy costs
What’s Included![]()
- Rinnai SE Series RUCS75iN Tankless Water Heater (Natural Gas)
- Built-in temperature control panel
- Installation manual and user documentation
- Mounting hardware
-
Warranty documentation
Specifications
| Specification | Details |
|---|---|
| Part Number | RUCS75IN |
| Fuel Type | Natural Gas |
| Color/Finish | White |
| Installation Location | Indoor |
| Unit Type | Condensing Tankless Water Heater |
| BTU Rating | 160,000 BTU |
| Hot Water Capacity Range | 0.26 – 7.5 GPM |
| Energy Efficiency | 0.90 UEF |
| Wi-Fi Capability | Yes (Wi-Fi Module Sold Separately) |
| Service Capacity | 2–4 Bathrooms |
| Vent Type | Condensing |
| Dimensions (W x H x D) | 18.5" × 27" × 10.5" |
Care & Maintenance Instructions
- Inspect and clean the air filter every 6–12 months to ensure proper airflow.
- Flush the heat exchanger annually (or as recommended) to prevent scale buildup.
- Keep ventilation areas clear to maintain efficient operation.
- Check venting and connections regularly for leaks or blockages.
- Use only approved Rinnai accessories and replacement parts for long-term reliability.
- Schedule professional servicing every 12–24 months for optimal performance.
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
This grill is a beast! Super high quality.
We sold our wood unit for this, and haven’t looked back. Easy pilots, no mess, looks great
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!
