At 4Most Energy, we proudly serve homeowners across the GTA and surrounding areas, delivering reliable heating solutions that combine efficiency, performance, and professional installation. The Rinnai I90SN Heat-Only Boiler is designed for homeowners who want dependable warmth while keeping energy costs under control.
With a heating capacity of 90,000 BTU, this unit is a smart choice for medium-sized homes with moderate heating demands. Powered by natural gas and equipped with advanced condensing technology, it captures more heat from every unit of fuel. A modulating burner automatically adjusts its output, ensuring your home stays comfortable while reducing wasted energy.
Key Benefits of the Rinnai IP090S
Heat-Only Design – Dedicated to central heating; pair with an indirect water heater for domestic hot water.
High Efficiency – Up to 95% AFUE, lowering fuel costs and emissions.
Smart Comfort – Modulating burner adapts to your home’s real-time heating needs.
Durability – Lifespan of 15–20 years with proper maintenance and professional installation.
Warranty Coverage – 12-year heat exchanger warranty, 5-year parts warranty, plus 1-year labour warranty from 4Most Energy.
 
Applications in Ontario Homes
Homes up to 3,000 sq. ft. – Ideal for small to medium-sized homes with moderate heating needs.
Versatile heating compatibility – Supports radiant in-floor heating, panel radiators, baseboard systems, or hydronic air handlers.
Best suited for suburban GTA properties requiring efficient, reliable heating without overloading the system.
 
Why Choose 4Most Energy in the GTA
When you trust 4Most Energy, you’re getting more than just a boiler—you’re investing in peace of mind:
1-year labour warranty included with every installation
Flexible financing options from 1 to 20 years
Expert installation by licensed professionals—done right the first time
Local service and support across Toronto and the surrounding areas