Rinnai RU98EN Review

A non-condensing tankless water heater is considered more efficient compared to the conventional tank-equipped type, but a condensing model is the most efficient of all, such as the Rinnai RU98EN. It is one of the most powerful water heaters from Rinnai categorized under Ultra series, featuring 0.95 energy factor, 9.8 GPM, and an easy-to-use temperature controller.

Main Features and Benefits

1. Condensing Water Heater – As mentioned earlier, the Rinnai RU98EN is a condensing tankless water heater, which is considered the most efficient model compared to others currently available. In a combustion process, fuel is burned thus it produces hot gases. In this case, hot gases are used for heating the water. With a non-condensing model, some of the hot gases are simply pushed through the vents to the outside, therefore wasted.

Rinnai RU98EN imageA condensing tankless water heater, such as the RU98EN, transfers the exhaust gases to heat the incoming water. In other words, energy optimization is much better.

2. Two Heat Exchangers – In order to operate as a condensing water heater, the Rinnai RU98EN uses two heat exchangers; one is made of steel, while another is made of copper. The stainless heat exchanger is used for recapturing the heat produced by the combustion process. The copper-made one uses pre-heated water to deliver optimum heating process above the gas burner. Cold water is already pre-heated before it flows through the primary burner, allowing for optimum heating process. According to the manufacturer, the RU98EN reaches energy factor of 0.95 for either natural or propane gas. [Read more...]

Rinnai V65EN Review

A truly reliable and durable tankless water heater can be difficult to find, but there is at least the promising Rinnai V65EN which offers the excellent 10-year warranty on heat exchanger, 5-year warranty on labor, and 1-year warranty on parts. This tankless water heater delivers up to 5.3 gallons of hot water per minute.

Main Features and Benefits

As mentioned earlier, the Rinnai V65EN delivers a maximum of 5.3 GPM of hot water, so it should be good enough to serve more than two bathrooms in your house in the same time. The unit is for outdoor installation only and powered by natural gas with maximum BTUs of 120,000. The overall dimension is fairly compact measuring at 14-inch W x 23-inch H x 9-inch D and it weighs 43.6 pounds. This tankless water heater is intended for residential applications and certified for installation in mobile homes also.

Rinnai V65EN imageThe V65EN uses a direct electric ignition device that requires a minimum flow rate of 0.4 GPM to light the burner. The maximum pre-set temperature range starts from 98 to 120 degree F, but you can use the provided temperature control to widen the range from to a maximum of 140 degree F.

The provided controller is the standard one, but this unit is compatible with any Rinnai digital controller which you can purchase separately. The controller also functions as error code indicator, so you can immediately figure out any possible problem and fix the issues. All error codes are listed in the user manual along with the possible remedies.

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Rinnai RL94iN Review

Tankless water heaters have become more popular nowadays as the demands for efficient home appliances are also increasing. Various brands manufactured by many different companies are competing greatly in the market. Currently, one of the best products available is the Rinnai RL94iN which brings a good range of features including ease-of-use, quiet operation, and reliable efficiency rate.


1. Maximum Capacity of 9.4 Gallons per Minute

The maximum volume possibly delivered is 9.4 gallons per minute. With such specification, Rinnai RL94iN should be adequate even when installed for multiple plumbing appliances. This water heater is indeed built to serve either residential or commercial need. Even better, the digital control allows you to set a different temperature for a different plumbing appliance. For example, you can have maximum heat for dishwasher, while you can set minimum heat for shower/bathroom at the same time.

Rinnai RL94iNThe appliance’s range of temperature starts from 98-degree F to 140 degree F. It can actually reach 185 degree F, but this will require an additional Commercial Controller that must be purchased separately. With a maximum capacity of producing 9.4 gallons per minute, it should be able to easily supply continuous hot water for your everyday activities.

2. Natural Gas

There are two types of tankless water heater based on power source, which are electric and gas. Rinnai RL94iN is powered by natural gas, so it does not contribute to your electricity bill.

The manufacturer actually provides two different variants of this tankless water heater. This appliance is available in natural gas type and liquid propane type. You should know that each product uses different power source, so it is good to check the available fuel source at your home before you decide to place an order. [Read more...]