A. O. SMITH R4MR-320E Tankless Water Heater 671657064006 4-CHAMBERS 240V

( Brand: A. O. Smith ), ( Manufacturer Part Number: R4MR-320E ), ( Model: R4MR 320E ), ( Ec Range: A E ), ( Color: Gray ), ( Water Connection: 3/4 In Npt ), ( Type: Tankless Water Heater/boiler ), ( Heating System: Instantaneous ), ( Voltage: 240 V ), ( Amperage: 133 Amps ), ( Features: Electric ), ( Mounting Location: Indoor ), ( Power: 32 Kilo Watts ), ( Country Of Origin: United States ), ( UPC: 671657064006 )

Review A. O. SMITH R4mr-320e.. 320e Tankless Hot Water Heater 32 Kw 240v

The Smith R4MR-320E tankless water heater is a high-performance, 4-chamber unit designed for residential applications. This model is part of Smith's R4MR series, which is known for its energy efficiency and reliability.

The R4MR-320E is a 32 kW water heater, making it suitable for supplying hot water to larger homes with multiple bathrooms and high hot water demand. It operates on 240 volts and is designed to provide a consistent supply of hot water at a flow rate of up to 5.5 gallons per minute (GPM).

This tankless water heater features four separate heating chambers, which enable it to deliver hot water more efficiently than traditional tank-style water heaters. Each chamber has its own heating element, allowing the unit to modulate its output based on the demand for hot water. This results in energy savings, as the heater only uses the energy it needs to meet the current demand.

The R4MR-320E is also equipped with advanced safety features, including a flame sensor and a high-limit temperature switch. These features help ensure safe and reliable operation of the water heater. Additionally, the unit comes with a built-in recirculation system, which helps reduce the wait time for hot water at the faucet by circulating water back to the heater.

Installation of the R4MR-320E is relatively straightforward, thanks to its compact size and wall-mounted design. The unit is also easy to maintain, with a user-friendly control panel and easy-to-access components. The R4MR-320E is covered by a comprehensive warranty, including a 15-year heat exchanger warranty and a 5-year parts warranty.

Overall, the Smith R4MR-320E tankless water heater is an excellent choice for homeowners who want a high-performance, energy-efficient, and reliable water heating solution. With its advanced features, compact design, and easy installation and maintenance, this unit is sure to meet the hot water needs of even the largest households.

Smith R4MR-320E Tankless Water Heater: A Comprehensive Analysis

The Smith R4MR-320E is a 4-chamber tankless water heater with a capacity of 32 kW and a voltage requirement of 240V. In this analysis, we will discuss the pros and cons of this water heater model to help you make an informed decision.

1. High Capacity: With a 32 kW capacity, this water heater can deliver a high flow rate, making it suitable for large households or commercial applications where a high demand for hot water exists.

2. Energy Efficient: Tankless water heaters do not store water, meaning they only heat water on demand. This results in energy savings as compared to traditional storage tank water heaters.

3. Compact Size: The Smith R4MR-320E has a compact design, making it easier to install in tight spaces as compared to tank-style water heaters.

4. Long Lifespan: Tankless water heaters typically have a longer lifespan as compared to traditional storage tank water heaters due to fewer moving parts and the absence of a storage tank.

5. Endless Hot Water: Since the water is heated on demand, you will never run out of hot water with a tankless water heater.

1. High Initial Cost: Tankless water heaters have a higher upfront cost as compared to traditional storage tank water heaters. This initial investment may deter some homeowners or businesses.

2. Complex Installation: Tankless water heaters require a more complex installation process as compared to tank-style water heaters. Professional installation is highly recommended.

3. Potential for Cold Water Sandwich: If there is a high demand for hot water in consecutive showers or appliances, there may be a brief delay between the delivery of hot water, resulting in a "cold water sandwich."

4. Higher Operating Cost: While tankless water heaters are energy efficient, they have a higher operating cost as compared to traditional storage tank water heaters due to their higher energy input.

The Smith R4MR-320E tankless water heater offers several advantages, including a high capacity, energy efficiency, compact size, long lifespan, and endless hot water. However, it also comes with disadvantages such as a high initial cost, complex installation, potential for cold water sandwich, and higher operating cost.

If you have a large household or commercial application with a high demand for hot water, the Smith R4MR-320E tankless water heater may be a suitable option. However, if you have a smaller household or a limited budget, a traditional storage tank water heater may be a more cost-effective solution. It is recommended to consult with a professional plumber or water heater technician to determine the best option based on your specific needs and circumstances.

Details:

Ideal for residential use, this instantaneous heating system provides hot water on demand, saving energy and space compared to traditional tank heaters. Smith R4MR 320E Hot Water Heater is a tankless, electric water heater with 4-chamber design, perfect for indoor installation. With a 32 KW 240v voltage and 133 amps, 2 x 70 double pole breaker #6 AWG wire size, this gray-colored heater boasts an EC range of A - E, making it energy-efficient. The water connection location at the bottom and 3/4 inch NPT ensure easy installation reliable performance.

part #: r4mr320e prices

• $500.00-$575.00

specifications wateheat:

• brand: A. O. Smith
• mpn: R4mr-320e
• model: R4mr 320e
• ec range: A E
• color: Gray
• water connection: 3/4 In Npt
• type: Tankless Water Heater/boiler
• heating system: Instantaneous
• voltage: 240 V
• amperage: 133 Amps
• features: Electric
• mounting location: Indoor
• power: 32 Kilo Watts
• country of origin: United States
• upc: 671657064006

returns wateheat:

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

offer wateheat:

• sold: 0
• started: April 6, 2026
• quantity: 1
• options: Ship-to-home
• availability: In Stock

payments wateheat:

• wallet: Paypal
• other
• credit card: Visa

general wateheat:

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

shipping wateheat:

• class: Economy
• transit: 3-9 Days
• type: Calculated
• service: UPS Ground Saver
• cost: $53.14
• carrier: UPS

seller wateheat:

• # reviews: 3745
• rating: 100.0%
• city: Joppa, Maryland

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