Rinnai I-Series 120,000 BTU Combi Condensing Gas Boiler – 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 I-Series 120,000 BTU Combi Condensing Gas Boiler – 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 I-Series 120,000 BTU Combi Condensing Gas Boiler – Natural Gas
• 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
Upgrade your home’s heating and hot water performance with the Rinnai I-Series 120,000 BTU Combi Condensing Gas Boiler (Natural Gas)—a powerful, compact, and ultra-efficient solution designed for modern comfort. Engineered with advanced condensing technology, this wall-mounted combi boiler delivers exceptional 95% AFUE efficiency while providing consistent whole-home heating and up to 5.1 GPM of domestic hot water.
Built for convenience and long-term reliability, the Rinnai I-Series features user-friendly electronic controls, easy serviceability, and compatibility with indirect tanks. Whether you’re upgrading an older system or installing in new construction, this high-efficiency boiler ensures dependable performance with significantly reduced energy consumption.
Perfect for residential applications, this premium unit includes an LP conversion kit, giving homeowners flexibility during installation. Trust Rinnai’s engineering excellence for a quieter, cleaner, and more efficient home comfort system.
Key Features:
- High-Efficiency Performance: 95% AFUE for reduced energy costs.
- Dual Function: Provides home heating and domestic hot water in one compact unit.
- Wall-Mounted Space-Saving Design: Ideal for tight installation areas.
- 5.1 GPM Hot Water Flow: Reliable hot water output for daily household needs.
- Natural Gas Ready: LP conversion kit included for flexible fuel options.
- User-Friendly Electronic Controls: Simple operation and improved comfort.
- Easy Maintenance & Serviceability: Designed for streamlined access.
- Indirect Tank Compatible: Supports additional hot water storage setups.
- Quiet, Clean, and Efficient Operation: Low energy consumption and reduced emissions.
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Durable Construction: Built for long-term reliability and consistent performance.
What’s Included![]()
- Rinnai I-Series Combi Condensing Gas Boiler (120,000 BTU)
- LP Conversion Kit
- User & Installation Manuals
- Mounting Hardware
Note: Primary Secondary Heating Kit required for installation (sold separately).
Specifications
| Category | Details |
|---|---|
| Part Number | IP120199C |
| Product Type | Combi Condensing Gas Boiler |
| Fuel Type | Natural Gas (LP kit included) |
| BTU Rating | 120,000 BTU |
| AFUE Efficiency | 95% |
| Hot Water Flow Rate | 5.1 GPM |
| Boiler Type | Heat Only / Combi |
| Vent Type | Condensing |
| Control Type | Electronic / IPI |
| Color / Finish | Silver |
| Mounting Style | Wall-Mounted |
| Weight | 76 lbs |
| Dimensions (W × H × D) | 18.5" × 26.4" × 11.45" |
| Required Accessories | Primary Secondary Heating Kit (sold separately) |
Care & Maintenance Instructions
- Schedule annual professional maintenance to ensure optimal efficiency.
- Keep the boiler area clean, dry, and well-ventilated.
- Regularly inspect venting and air intake for blockages.
- Check pressure and temperature settings periodically.
- Use only approved Rinnai parts for service and replacement.
- Avoid storing chemicals or corrosive materials near the boiler.
- Flush the system as recommended to maintain maximum performance
Let customers speak for us
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Peaceful water sound and super easy to maintain.
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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!
