The Ultimate Guide to Rinnai Boilers

The Basics

Whether you want to warm up the entire house during winter or simply enjoy a hot shower, temperature regulation is a vital part of maintaining a comfortable home. And no one knows more about home temperature regulation than Rinnai, a company with nearly 100 years of experience working in the heating industry. With their collection of condensing boilers, Rinnai hopes to provide their customers with new levels of convenience and reliability. In this guide, we’ll go over some of the key factors you should consider when purchasing a Rinnai condensing boiler.

Boiler Types

Every boiler that Rinnai sells is guaranteed to perform at the highest quality in order to provide you with an ideal heating experience (for more information on exactly how Rinnai backs up this promise, check out their condensing boiler warranty). There are, however, a few different types of Rinnai boilers that differ based on the size of the space you want to heat, and the amount of energy you want to save in the process.

The Rinnai E Series boiler is energy efficient for smaller domestic situations.

The Rinnai E Series boiler is energy efficient for smaller domestic situations.

Q Premier Series

According to Rinnai, the Q Premier Series “uniquely meets homeowner demand for high-volume hot water and efficient home heating, all in one single, space-saving appliance.” The combination boiler and water heater stands on the floor and comes completely assembled, with a 24 gallon storage tank and an 85,000 to 130,000 BTU input, depending on the model.

Q Series

If efficiency is top priority, then you might want to consider the Rinnai Q Series. This model is compact and wall-mounted, with a maximum BTU input that ranges from 85,000 to 205,000. Additionally, the boiler is extra quiet when it operates, and is able to run off either natural gas or propane.

E Series

If you have a smaller home with 1-2 baths, then the Rinnai E Series (pictured) is the way to go. This lineup is caters to domestic situations, with a “heat only” model that just heats the home, and a “combi” option that provides hot water as well. Plus, the boiler’s integrated control system is able to track outdoor temperature and adjust flow temperature efficiently depending on the weather. With a maximum BTU input starting at 50,000, the E Series was created to use a smaller amount of power and output less harmful emissions, while still maintaining the high level of heating quality Rinnai is known for.

Boiler Accessories

In addition to their collection of condensing boilers, Rinnai offers a couple accessories to improve your experience. While sometimes not required, these parts boost performance and remove waste, and are sure to help you get the most out of your particular heating situation.

The Rinnai low-loss header kit fits beside the boiler and balances any excesses in water temperature or flow.

The Rinnai low-loss header kit fits beside the boiler and balances any excesses in water temperature or flow.

Low-Loss Header

Built to optimize both the performance and the durability of your boiler, the Rinnai low-loss header kit is a separate, space-saving unit that attaches to the boiler and maintains a consistent water flow and temperature. When the flow rate through the boiler system exceeds the maximum recommended rate, the low-loss header acts as a safeguard that balances out any irregularities by separating the primary flow pipe into two secondary flow pipes (the same works for the incoming flow of water). The kit also allows plumbers or contractors to quickly turn off the flow of water to the boiler if the system ever requires maintenance.

The good news is that the low-loss header kit is actually included when you purchase a boiler from the Q Series, the Q Premier Series, or the E Series (however, be aware that boilers in the E Series with model numbers ending in “R” require the low-loss header kit to be purchased separately).

The Rinnai condensate neutralizer kit ensures a safe water byproduct.

The Rinnai condensate neutralizer kit ensures a safe water byproduct.

Condensate Neutralizer Kit

One of the core features of Rinnai boilers is that they condense water vapor and produce excess liquid as a result. This water byproduct is highly acidic, often to the point where it can damage pipes, and select states require it to be treated and balanced out before draining into the public water system. Rinnai’s condensate neutralizer kit solves this problem by filtering condensate and neutralizing any acidity directly after it leaves the boiler. The kit uses limestone particles as a filter, and a clear plastic case allows you to easily spot when it’s time for a replacement. When purchasing a boiler, make sure to check the water safety requirements for your state to see if you need to consider a neutralizer kit.

Benefits of the Rinnai Condensing Boiler

Comfort and efficiency are key when it comes to Rinnai condensing boilers. Across the three series mentioned above, features include compact units that conserve space, weather trackers that adjust heating levels accordingly, and flexible venting options that allows for outside air intake through either a wall or a roof, depending on your particular space situation. Additionally, because these boilers are condensing, any excess water vapor produced by the system is captured and used for additional heat energy, ensuring that waste is kept to a minimum.

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