4Most Energy installation covers everything needed:

• Gas piping & venting

• Plumbing connections

• Drain system setup

• Electrical hookup & controls

• System commissioning

• One-year labor warranty with $most Energy

No hidden surprises — we keep it straightforward.

A professional boiler estimate from 4Most Energy will include all key cost factors:

• Cost of the boiler unit – this is often the price you see online.

• Cost of accessories (if required) – such as circulation pumps, controllers, air eliminators, or zoning controls.

• Cost of labor – this varies depending on your home’s setup, existing system, and installation complexity. Labor costs can’t be guessed without a proper review of the situation, system design, and material needs.

At 4Most Energy, there are no surprises. Our technicians carefully investigate every detail during the estimate process so you know exactly what you’re paying for.

Depending on your existing setup, some additional components may be required for optimal performance:

• New circulation pump – if the existing pump is too old or not powerful enough.

• Air eliminator – especially important in larger systems sensitive to oxygen buildup and serving multiple heating zones.

• Strainers – to prevent dirt and debris from entering the boiler, particularly in systems with cast iron radiators and black iron piping.

• Zoning controller – if your home has more than one thermostat or multiple zones that require independent temperature control.

• Automatic feeder – to keep the system filled with water if the existing feeder is outdated or not functioning properly.

Our technicians will review your system and recommend only the accessories you truly need.

4Most Energy installation covers everything needed:

• Gas piping & venting

• Plumbing connections

• Drain system setup

• Electrical hookup & controls

• System commissioning

• One-year labor warranty at 4Most Energy

No hidden surprises — we keep it straightforward.

The installation cost ranges at 4Most Energy is from $1,900 to $3,000 for the Greater Toronto Area (GTA) and surrounding regions, and includes only labor and installation materials such as piping and venting (it does not include the boiler unit or accessories). Our experts are experienced and will provide a full and precise estimate based on your system without any surprises.

Yes. 4Most Energy provides annual maintenance and repairs for Rinnai boilers, ensuring efficiency and preventing unexpected breakdowns. We also service in-floor heating, baseboard systems, and radiators.

Our professional installation with high-quality materials and workmanship is designed to maximize the lifespan of your boiler, often 15–20 years with regular maintenance. A proper installation prevents costly breakdowns during extreme Canadian winters.

How do I find the best deal on a new Rinnai boiler?

The “best deal” isn’t just about the lowest price — it’s about total value:

• See which contractors can answer all your questions and give detailed explanations about the job.

• Challenge the knowledge of the estimator. If they need to check with a colleague or manager, it may indicate they are acting as a sales person rather than a professional expert.

• Choose a licensed installer with proven experience (like 4Most Energy).

• Compare detailed quotes from at least 3 companies. Look for workmanship, warranty, and included materials — not just the boiler cost.

• Ask if the installer checks gas piping, venting, and hydronic design (these details affect long-term performance).

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Remember, a boiler is a significant investment, but going with the wrong contractor can cost thousands in repairs, services, and labor. In many cases, a poorly installed system may need a complete replacement within the first 3 years.

At 4Most Energy, we provide transparent pricing, free consultation, and no-pressure estimates. Sometimes paying a few hundred more upfront for professional installation saves thousands in future repair costs.

Both Rinnai and Navien make high-efficiency boilers, but there are key differences:

• Rinnai is known for long-term reliability, straightforward design, and strong North American support.

• Navien offers advanced features and competitive pricing but can sometimes require more maintenance.

At 4Most Energy, we’ve worked with both brands. We often recommend Rinnai for homeowners who want durability, consistent parts availability, and strong warranty support. Ultimately, the best choice depends on your home’s size, water demand, and long-term goals — which we review with you during your free consultation.

Yes. We strive to give you the best financing options with deferred payment, low-interest loans, or competitive monthly payments. Financing is subject to a credit check and may include seasonal promotions to make it easier for homeowners to invest in a high-quality boiler system