RINNAI MC-91-S Tankless Water Heater Controller 766156002137

( Brand: Rinnai ), ( Type: Tankless Water Heater/boiler ), ( Energy Star: 5 Stars ), ( Heating System: Instantaneous ), ( Color: Silver ), ( UPC: 766156002137 )

Review RINNAI New Tankless Water Heater Controller Silver

The Rinnai MC-91-S Tankless Water Heater Controller is a state-of-the-art, intelligent device designed to optimize the performance and energy efficiency of your Rinnai tankless water heater system. This controller offers advanced features and user-friendly functionality to ensure a consistent and efficient water heating experience.

The MC-91-S controller is equipped with a high-resolution, backlit LCD display screen that provides clear and easy-to-read information on the temperature setting, water flow rate, and diagnostics. The intuitive user interface allows users to easily adjust temperature settings and monitor system performance with just a few simple button presses.

One of the standout features of this controller is its advanced modulating technology. This technology allows the controller to adjust the water heater's output in small increments based on the demand for hot water. This results in a more constant and consistent water temperature, as well as increased energy efficiency by only heating the water that is needed.

Another key feature of the MC-91-S controller is its ability to communicate with other smart home devices and systems. It is compatible with both Wi-Fi and Ethernet connections, allowing users to remotely monitor and control their water heater system using a smartphone or tablet. This level of connectivity also enables the controller to receive software updates and new features, ensuring that the system stays up-to-date and operating at peak performance.

The MC-91-S controller also includes a number of safety features to ensure the safe and reliable operation of the water heater system. These features include automatic temperature limit adjustment, overheat protection, and a freeze protection mode. In the event of a system malfunction or error, the controller will also provide clear diagnostic codes to help identify and resolve the issue.

In summary, the Rinnai MC-91-S Tankless Water Heater Controller is a must-have accessory for any Rinnai tankless water heater system. Its advanced features, user-friendly interface, and connectivity options make it an essential tool for optimizing system performance, energy efficiency, and safety. With the MC-91-S controller, users can enjoy a consistent and reliable supply of hot water, while also reducing their energy consumption and saving money on their utility bills.

Rinnai MC-91-S Tankless Water Heater Controller: Pros, Cons, and Conclusion

The Rinnai MC-91-S is a popular tankless water heater controller known for its advanced features and energy efficiency. Here are the pros and cons that may help in making an informed decision about purchasing this controller.

1. Energy Efficiency: The MC-91-S controller is designed to work with Rinnai's condensing tankless water heaters, which are highly energy-efficient, providing significant savings on energy bills.

2. Precise Temperature Control: The controller allows users to set the temperature within a range of 98 F to 140 F (32 C to 60 C), ensuring consistent water temperature throughout the household.

3. User-Friendly Interface: The controller features an intuitive, easy-to-use interface with a large LCD display, making it simple for users to navigate and adjust settings.

4. Remote Control Capability: The MC-91-S controller can be controlled remotely using the Rinnai Remote Application, allowing users to manage their water heater settings from their smartphone or tablet.

5. Compatibility with Multiple Fuels: The controller is compatible with various fuel types, including natural gas and propane, making it suitable for a wide range of households.

1. Cost: The Rinnai MC-91-S controller is a premium product, and its price tag may be higher than some other tankless water heater controllers on the market.

2. Complex Installation: Installing the MC-91-S controller may require professional assistance, as it involves working with natural gas or propane lines and electrical wiring.

3. Limited Integration with Other Home Systems: While the controller can be integrated with the Rinnai Remote Application, it may not work seamlessly with other home automation systems, such as Amazon Alexa or Google Home.

The Rinnai MC-91-S tankless water heater controller offers numerous advantages, such as energy efficiency, precise temperature control, user-friendly interface, remote control capability, and compatibility with multiple fuels. However, its high cost and complex installation process may be drawbacks for some potential buyers. Ultimately, the decision to purchase the MC-91-S controller depends on individual preferences and requirements, as well as the availability of professional installation services.

For those seeking an energy-efficient, advanced tankless water heater controller with precision temperature control, remote capabilities, and compatibility with multiple fuel types, the Rinnai MC-91-S is a solid choice. However, it is recommended to consider the cost and installation complexity before making a purchase. Alternatively, those with limited budgets or simpler heating system requirements may find other controllers more suitable for their needs.

End of article.

Details:

part #: 766156002137 prices

• $29.00-$749.95

specifications wateheat:

• brand: Rinnai
• type: Tankless Water Heater/boiler
• energy star: 5 Stars
• heating system: Instantaneous
• color: Silver
• upc: 766156002137

general wateheat:

• condition: Open box
• Heating, Cooling Air > Water Heaters > Tankless Water Heaters

seller wateheat:

• rating: 100.0%
• # reviews: 1099
• city: Mecosta, Michigan

shipping wateheat:

• transit: 3-8 Days
• service: USPS Ground Advantage
• carrier: USPS
• type: Calculated
• class: Standard
• cost: $5.31

offer wateheat:

• started: April 14, 2025
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• sold: 0

returns wateheat:

• method: Money back
• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

payments wateheat:

• wallet: Paypal
• other
• credit card: Discover

Rinnai MC-91-S Is Similar To:

• Rinnai Rl94in Tankless Water Heater Natural Gas (58.3% similar) Rinnai instant tankless water heater, model RL94IN. Turning unit off and on fixes runs fine for a while but then get code 11 again. 9 years old, runs on natural gas, for indoor use. Works but gives intermittent code 11'S. Selling as-is for parts or repair...(May 17th, 2024)
• Rinnai R75lsi R75-lsi Tankless Water Heater Natural Gas 7.5 Gpm 150 Psi Specs In Pics (50.6% similar) Has some signs of use and small surface rust on the top but overall looks good. Rinnai R75-LS tankless water heater natural gas 7.5 GM 150 psi specs in pics condition is used. See pictures for details. Comes with tankless water heater and connections seen in the pictures...(May 17th, 2024)
• Rinnai Ru160in Natural Gas Indoor Tankless Water Heater (56.3% similar) Part #: Rinnai RU160IN for sale...(May 19th, 2024)
• Rinnai Mc-91-1us-s Tankless Water Heater Controller (75.8% similar) Rinnai MC-91-1US-S tankless water heater controller used, MC911USS. Water heater control 1X4X2IN 98-140F temp range...(May 20th, 2024)
• Rinnai Dr-7738-501c Tankless Water Heater Dr-7738-501d Fan Assembly U287-1829-cw-2 (46.5% similar) Removed from working RL75I condition as pictured...(May 28th, 2024)
• Rinnai 105000260 Controller (46% similar) Compatible in. Genuine used part...(May 29th, 2024)
• Rinnai Ru199in Condensing Tankless Hot Water Heater 11 Gpm Natural Gas Indoor Instal (49.7% similar) Used side plates, some of the fasteners are broken, there minor scratches. The boiler is sold only without taps...(June 5th, 2024)
• Rinnai Reu-am1620wd-us-p V53dep Dented Outdoor Tankless Water Heater Propane Gas 120k Btu (49.4% similar) The Rinnai V53DEP is made in japan and comes with one unit quantity. The unit height is 20 inches, and the width 14 inches. It is a unit type and can be mounted out doors. This compact water heater has a connection location at the bottom and corrosion-resistant feature. The instantaneous...(June 9th, 2024)
• Rinnai Re180in Indoor Tankless Water Heater Natural Gas 180k Btu Scratch dent (52% similar) Does not ignite...(June 24th, 2024)
• Rinnai U245-865-3 Twhwor5 Hot Water Outlet With Isolation And Pressure Relief Valves (34.2% similar) With a web stone 600 wog isolation valve. The documentation provided or identification appearing upon this equipment, the equipment described and offered is in no way certified for, recommended for any specific use...(July 3rd, 2024)
• Rinnai Rucs65in 5 Gpm Residential Indoor Natural Gas Tankless Water Heater (47.6% similar) In the kit, only boiler itself on front side there are no plates, as can be seen in photo, dent scratches, and nothing is known about performance of. When turned on, it turns off after a few seconds...(July 10th, 2024)