Rinnai I-Series 120,000 BTU Solo Heat Only Condensing Gas Boiler (i120SN) – 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 Solo Heat Only Condensing Gas Boiler (i120SN) – Natural Gas is backordered and will ship as soon as it is back in stock.
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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.
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As soon as your order is received on our end, we process it!
Rinnai I-Series 120,000 BTU Solo Heat Only Condensing Gas Boiler (i...
• 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 reliable, high-efficiency home heating with the Rinnai I-Series i120SN Solo Heat Only Condensing Gas Boiler. Designed for superior performance and energy savings, this advanced boiler delivers consistent comfort with an impressive 120,000 BTU heating capacity.
Built with Rinnai’s exclusive self-cleaning stainless-steel heat exchanger and a secondary flat plate heat exchanger, it ensures long-lasting efficiency and minimal maintenance. The compact wall-mounted design frees up valuable space while maintaining powerful whole-home heating performance.
Perfect for homeowners who value performance, energy savings, and reliability, the Rinnai I-Series i120SN is one of the most efficient condensing boilers available, achieving one of the highest AFUE ratings in the industry.
Key Features:
- High-Efficiency Heating: 120,000 BTU (35.2 kW) heating capacity for consistent, even warmth.
- Condensing Technology: Maximizes fuel efficiency and reduces energy costs.
- Stainless-Steel Heat Exchanger: Self-cleaning design enhances durability and performance.
- Compact Wall-Mount Design: Saves space compared to traditional floor-standing boilers.
- Dual Heat Exchangers: Includes a secondary flat plate exchanger for improved energy recovery.
- ENERGY STAR® Certified: Meets the highest standards for energy efficiency.
- Ultra-Low NOx Emissions: Environmentally friendly and SCAQMD approved.
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Flexible Fuel Options: Compatible with both Natural Gas and Propane (LP).
What’s Included![]()
- Rinnai I-Series i120SN Heat-Only Boiler Unit
- Wall Mounting Bracket
- User & Installation Manual
- Connection Hardware Kit
- Warranty Documentation
Specifications:
| Specification | Details |
|---|---|
| Manufacturer Model | i120SN |
| Type | Heat-Only Condensing Gas Boiler |
| Heating Capacity | 120,000 BTU / (35.2 kW) |
| Minimum Output | 15,000 BTU / (4.3 kW) |
| Fuel Type | Natural Gas (convertible to Propane) |
| Energy Efficiency | ENERGY STAR® Certified |
| Emissions | Ultra-Low NOx / SCAQMD Approved |
| Heat Exchanger Material | Stainless Steel |
| Product Width | 18.5 in / (471 mm) |
| Product Height | 26.4 in / (671 mm) |
| Product Depth | 10.9 in / (276 mm) |
| Product Weight | 62.0 lb / (28 kg) |
| Mounting Type | Wall-Mounted |
| Application | Whole-Home Central Heating |
Care & Maintenance Instructions
- Annual Inspection: Have a certified technician inspect the boiler yearly for optimal efficiency.
- Clean Air Intake & Exhaust: Keep vents clear of obstructions such as dust, debris, or ice buildup.
- Monitor Water Pressure: Maintain proper pressure levels as indicated in the user manual.
- Flush System Periodically: Helps remove any sediment and ensures smooth operation.
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Check for Leaks: Regularly inspect all visible connections and fittings.
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!
