Rheem vs AO Smith Heat Pump Water Heater

Rheem vs AO Smith Heat Pump Water Heater: 7 Differences [Must Know]

Last Updated on June 12, 2023

Heat pump water heaters can significantly improve your home’s comfort and efficiency. As you want to pick a brand, Rheem and AO Smith come to your list, as they are both major contenders. Therefore, understanding their differences will help you decide.

Rheem boasts various products and extensive distribution, while AO Smith focuses on top-quality gas models and anti-scale technology. With advanced smart features, Rheem sets itself apart, but AO Smith offers excellent energy efficiency at a wallet-friendly price point.

Today we’ll compare both brands regarding product range, availability, reliability, energy efficiency, noise level, additional features, and price. By the end of this article, you’ll better understand which brand is the right fit for your needs.

Key Differences Between Rheem and AO Smith Heat Pump Water Heater

Key Differences Between Rheem and AO Smith Heat Pump Water Heater

Choosing between Rheem and AO Smith as a heat pump water heater presents an even greater challenge. To help you decide which brand to go with, here are a few key differences between these brands:

Product Range:

The range of electric and gas options for these major water heater brands is impressive, with over 300 models. Rheem offers about 42 electric tanks and tankless options. In comparison, AO Smith specializes in gas water heaters, including 208 ProLine series models & 58 Signature Series options.


Rheem water heaters are more widely distributed, and AO Smith is accessible in major centers. This means you may have difficulty finding a Rheem water heater if you live in a smaller town or rural area.


When considering the reliability of these two brands, it’s important to consider their track records.

Both Rheem and AO Smith have a reputation for producing high-quality water heaters that last for many years. These brands have been around for decades, which is a testament to their reliability and quality.

Rheem is known for producing water heaters that are durable and long-lasting. They’re also known for their availability of replacement parts, which means that if something goes wrong with your Rheem water heater, it can be fixed quickly and easily.

AO Smith is also known for producing reliable water heaters lasting many years. They’re particularly known for their tankless water heaters, which are highly efficient and reliable.

Energy Efficiency:

Regarding Rheem vs AO Smith heat pump water heaters, both brands offer energy-efficient units that meet energy efficiency standards and have low emissions.

But Rheem takes it a step further by offering EcoNet technology that allows you to control your water heater from your phone and monitor its energy usage. This level of control can help you optimize your energy usage and save even more money on your energy bills.

AO Smith also offers energy-efficient heat pump water heaters with an impressive Energy Factor (EF) rating of up to 3.45. Their models use a hybrid design that combines heat pump technology with electric elements to provide reliable and efficient hot water.

Noise Level:

The difference in noise level between Rheem and AO Smith water heaters is significant. If you’re looking for a quiet water heater, Rheem is generally quieter than AO Smith.

Rheem heat pump water heaters produce up to 65 dB, while AO Smith heat pump can produce up to 80 dB. This means that Rheem is a better choice if you’re sensitive to noise or want a water heater that won’t disturb the peace in your home. 

Additional Features:

Rheem offers mobile app control, leak detection, and smart technology. This means you can control your water heater from anywhere using your phone, and you’ll be notified if there’s a leak. With smart technology, your water heater can learn your usage patterns and adjust accordingly, leading to energy savings over time.

Alternatively, AO Smith models often come with anti-scale technologies. This is important because scale buildup can reduce the efficiency of your water heater over time. With AO Smith’s anti-scale technology, you can extend the life of your water heater and potentially save money in the long run.

Price Range:

You might be overwhelmed by these two brands’ price ranges, but don’t let that deter you from finding the perfect water heater. While Rheem heat pump water heaters are generally more expensive than AO Smith models, their advanced features may justify the higher price point.

Here are some things to consider when comparing the price range of Rheem and AO Smith heat pump water heaters:

  • Rheem water heaters tend to have a higher upfront cost, but they may save you money in the long run due to their energy efficiency and smart technology options.
  • AO Smith water heaters may be a more affordable option for those on a budget, but they may not offer the same advanced features as Rheem models.
  • Both brands offer a range of sizes and capacities to fit different household needs, so consider what size and capacity you need before deciding based on price alone.
  • It’s also important to factor in installation costs and any potential rebates or incentives for either brand in your area.

Does A.O. Smith make a good water heater?

Does A.O. Smith make a good water heater

AO Smith’s water heater has a BEE 5 Star rating for high energy efficiency, meaning it uses less energy and saves money. This makes it one of the most energy-efficient options in the market and highlights AO Smith’s commitment to the environment.

By producing eco-friendly appliances, they’re reducing their carbon footprint. Additionally, the rating ensures the water heater meets high performance and quality standards so that you can feel good about your purchase.

How long will an AO Smith water heater last?

AO Smith water heater can last up to 20 years, providing long-lasting comfort and peace of mind. That’s right, the average lifespan of a tankless AO Smith water heater is 20 years, while a tank water heater can last between 8 to 12 years.

Here are some reasons you can trust an AO Smith water heater to last:

  • Quality materials: AO Smith uses high-quality materials in their water heaters, such as stainless steel and copper, which are durable and corrosion-resistant.
  • Advanced technology: AO Smith uses advanced technology in their heaters, such as electronic controls and self-diagnostic systems, which help extend the heater’s life.
  • Regular maintenance: It can last even longer if you regularly maintain your AO Smith water heater. Regular maintenance includes flushing the tank, checking the pressure relief valve, and replacing the anode rod.

Why is my AO Smith water heater constantly running?

If your AO Smith water heater runs non-stop, it could be due to sediment buildup from minerals settling at the bottom of the tank. These minerals combine to create a sludge that can clog the heating element, preventing the water from reaching the desired temperature.

As a result, the water heater works overtime to heat the water, which can lead to increased energy bills and potential damage to the unit. It’s important to address sediment buildup in your water heater promptly.

Routine maintenance, including regularly flushing the tank, is key to preventing sediment buildup and prolonging your water heater’s lifespan.

Is Rheem a good water heater brand?

Is Rheem a good water heater brand

In recent years, Rheem has become the most trusted brand for its good heat pump water heater. They’ve received the best reviews and trust ratings among the most popular water heater brands as judged by shoppers.

With their exceptional performance and energy efficiency, Rheem water heaters have become a popular choice for homeowners. One of the reasons Rheem is a good water heater brand is its commitment to innovation and technology.

They have many models, including hybrid and tankless water heaters, that offer high energy efficiency and cost savings. Aside from that, Rheem water heaters are designed to last for a long time, which is a great investment for homeowners.

How quiet are Rheem heat pump water heaters?

Rheem Performance Platinum is the ideal water heater for a quiet and eco-friendly option. This water heater operates at a low hum, producing only 49 to 65 dB of sound, making it perfect for those sensitive to noise or living in small spaces.

You’ll be surprised at how peaceful your surroundings are with the quietest heat pump water heater available, Rheem Performance Platinum. This appliance is the best choice for homeowners who are noise sensitive, as it only produces a low hum.

With its hybrid heat pump technology, you can consume less energy than traditional water heaters.

What is the life expectancy of a Rheem heat pump water heater?

What is the life expectancy of a Rheem heat pump water heater

If you’re considering a Rheem heat pump water heater, you should know that they have a long lifespan of 15 years or more. This, of course, depends on how well you care for them. But with proper installation and regular maintenance, your Rheem heat pump can exceed its expected lifespan.

By transferring heat using refrigerant, these water heaters work all year long to keep your house warm. With proper maintenance, rheem heat pump water heaters last longer than traditional models, making them a sound investment for your home.

Choose the Best Heat Pump Water Heater: Rheem or AO Smith

Both Rheem and AO Smith offer reliable options for heat pump water heaters. However, Rheem may be worth the extra investment if you want a quieter unit and a longer lifespan.

Conversely, if energy efficiency is your top priority, AO Smith’s high star rating makes it a great choice. One anecdote to illustrate this decision-making process is the story of two neighbors.

Ultimately, it comes down to personal preferences and priorities when selecting between Rheem and AO Smith. So, take the time to consider your needs and make an informed decision.

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