Top 5 Oil Fired Hot Water Heaters of 2024: Find Your Perfect Fit!

Steve Donaldson Master HVAC technician
Steve Donaldson
Master HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

Steve Donaldson Master HVAC technician
Steve Donaldson
Master HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

Hey there! Looking for the best oil fired hot water heater? You've come to the right place. In this post, I'll be sharing the top 5 oil fired hot water heaters of 2024, so you can find the perfect fit for your needs. Whether you're looking for efficiency, durability, or affordability, we've got you covered. So, let's dive in and discover the top contenders that will keep your water nice and toasty all year round!

1
AO Smith COF-385A Water Heater
✯ In summary, a reliable choice ✯
BUY NOW Amazon.com
9.6
2
AO Smith COF-700A Tank Type Water Heater
Recommended choice
BUY NOW Amazon.com
9.6
3
AO Smith COF-315S Oil Fired Water Heater
Recommended option
BUY NOW Amazon.com
9.5
1

AO Smith COF-385A Water Heater

 in stock
Amazon.com
8.3
In summary, a reliable choice
The AO Smith COF-385A Commercial Oil Fired Tank Type Water Heater is an energy-efficient product that is easy to clean and maintain. It meets industry standards, but the limited warranty coverage and higher initial cost are drawbacks to consider.
Efficient and Reliable
  • Energy efficient
  • Easy to clean and maintain
  • Meets industry standards
Drawbacks
  • Limited warranty coverage
  • Higher initial cost

The AO Smith COF-385A Commercial Oil Fired Tank Type Water Heater is a powerful and efficient solution for your commercial water heating needs. With a 75-gallon capacity and an input of 385,000 BTU, this water heater can provide hot water quickly and reliably. It features a barometric draft regulator and a single-stage oil pump for optimal performance. The handhole cleanout makes maintenance and cleaning a breeze. This water heater meets or exceeds the thermal efficiency requirements of the U.S. Department of Energy and the current edition of ASHRAE/IESNA 90.1. With its durable construction and high-quality components, the AO Smith COF-385A is built to last.

Efficient and Reliable Performance
  • Barometric Draft Regulator
  • Single Stage Oil Pump
  • Handhole Cleanout
  • Meets or exceeds thermal efficiency standards
2

AO Smith COF-700A Tank Type Water Heater

 in stock
Amazon.com
8.2
Recommended choice
The AO Smith COF-700A Commercial Oil Fired Tank Type Water Heater is an energy-efficient and reliable option that meets industry standards. However, it may have limited availability in certain regions and a higher upfront cost compared to electric water heaters.
Advantages
  • Energy efficient
  • Reliable performance
  • Meets industry standards
Drawbacks
  • Limited availability in certain regions
  • Higher upfront cost compared to electric water heaters

The AO Smith COF-700A Commercial Oil Fired Tank Type Water Heater is a high-performance solution for commercial water heating needs. With a 69-gallon capacity and 700,000 BTU input, this water heater ensures a reliable and efficient supply of hot water. It features a barometric draft regulator, single-stage oil pump, and a handhole cleanout for easy maintenance. This water heater meets or exceeds the thermal efficiency requirements set by the U.S. Department of Energy and the ASHRAE/IESNA 90.1 standards. With its durable construction and top-notch performance, this water heater is an excellent choice for indoor installations. The product dimensions are 24.75 x 24.75 x 79.5 inches, and it comes with a limited 3-year warranty.

Efficient and reliable hot water
  • Barometric Draft Regulator
  • Single Stage Oil Pump
  • Handhole Cleanout
  • Meets or exceeds thermal efficiency standards
3

AO Smith COF-315S Oil Fired Water Heater

 in stock
Amazon.com
8.2
Recommended option
The AO Smith COF-315S Commercial Oil Fired Tank Type Water Heater is an efficient and easy to maintain product that meets industry standards. However, it may be less available in certain regions and has a higher initial cost compared to other water heaters.
Efficient and Reliable
  • Efficient operation
  • Easy maintenance
  • Meets industry standards
Performance Limitations
  • Limited availability in certain regions
  • Higher initial cost compared to some other water heaters

The AO Smith COF-315S Commercial Oil Fired Tank Type Water Heater is a reliable and efficient choice for commercial use. With a capacity of 84 gallons and an input of 315,000 BTU, this water heater is designed to meet or exceed the thermal efficiency requirements set by the U.S. Department of Energy and the current edition of ASHRAE/IESNA 90.1. It features a barometric draft regulator, single stage oil pump, and handhole cleanout for ease of maintenance. With its indoor installation and limited 3-year warranty, this water heater is a practical and durable choice for commercial applications.

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Efficient and reliable heating solution
  • Barometric Draft Regulator
  • Single Stage Oil Pump
  • Handhole Cleanout
  • Meets or exceeds thermal efficiency standards
4

Bock 72E Water Heater with Carlin EZ-2HP Burner

 out of stock
Amazon.com
7.8
Great Choice
The Bock Oil Fired Water Heater Model 72E is a reliable and efficient water heater with a high heating capacity of 199,000 BTU and a large water storage capacity of 67 gallons. It comes with a reliable Carlin EZ-2HP oil burner for optimal performance. However, it's important to note that it requires oil for operation and has a limited capacity of 67 gallons.
Advantages of Bock 72E Water Heater
  • High heating capacity
  • Large water storage capacity
  • Comes with a reliable oil burner
Shortcomings
  • Limited capacity (67 gallon)
  • Requires oil for operation

The Bock Oil Fired Water Heater Model 72E is a high-performance water heater that combines efficiency and durability. With a capacity of 67 gallons, this water heater is perfect for providing hot water to a large household or commercial space. The Carlin EZ-2HP Oil Burner, with a rating of 199,000 BTU, ensures that the water heats up quickly and efficiently. The motor voltage of 115V guarantees reliable operation, while the pump pressure of 150PSI ensures a steady flow of hot water. This new-open box water heater is a reliable and cost-effective solution for your hot water needs.

Top-notch performance and efficiency
  • Model 72E
  • 67 Gallon Water Heater
  • Carlin EZ-2HP Oil Burner included
  • 199,000 BTU
  • New-Open Box
5

AO Smith COF-700S Oil Fired Water Heater

 in stock
Amazon.com
7.7
Conclusion: Reliable and efficient
The AO Smith COF-700S Commercial Oil Fired Tank Type Water Heater is a reliable and efficient option for those in need of a commercial water heater. With features like a barometric draft regulator, single stage oil pump, and handhole cleanout, it offers convenience and performance. However, it may have limited availability in certain regions and a higher initial cost compared to electric water heaters.
Efficient and Reliable
  • Barometric Draft Regulator
  • Single Stage Oil Pump
  • Handhole Cleanout
Drawbacks
  • Limited availability in certain regions
  • Higher initial cost compared to electric water heaters

The AO Smith COF-700S Commercial Oil Fired Tank Type Water Heater is a powerful and efficient solution for commercial water heating needs. With a 69-gallon capacity and an input of 700,000 BTU, it provides ample hot water for various applications. Equipped with a barometric draft regulator and a single-stage oil pump, this water heater ensures optimal performance and reliability. The handhole cleanout feature allows for easy maintenance and cleaning. Meeting or exceeding the thermal efficiency standards set by the U.S. Department of Energy and ASHRAE/IESNA 90.1, this water heater is designed to deliver exceptional energy efficiency. Manufactured by Century Electric/AO Smith Motors Co, it comes with a limited 3-year warranty for added peace of mind. With its indoor installation style and dimensions of 24.75 x 24.75 x 79.75 inches, this water heater is suitable for various commercial settings.

Powerful and efficient heating solution
  • Barometric Draft Regulator
  • Single Stage Oil Pump
  • Handhole Cleanout
  • Meets or exceeds thermal efficiency standards

The Top Oil Boilers for Efficient Home Heating

Affordable Efficiency: Finding the Perfect Price for Your Oil Fired Hot Water Heater

  • Budget range (under $1,000): These are typically basic models with lower capacity and fewer advanced features. They are suitable for small households or those on a tight budget
  • Mid-range ($1,000 – $2,000): In this price range, you can find hot water heaters with larger capacities, better energy efficiency, and more advanced features like digital controls and programmable timers. These models are ideal for average-sized households looking for a balance between cost and performance
  • High-end ($2,000 and above): The high-end price range offers top-of-the-line oil fired hot water heaters with larger capacities, excellent energy efficiency ratings, and advanced features like smart controls and self-cleaning mechanisms. These models are perfect for larger households or those who prioritize energy savings and convenience
  • Custom or specialty models: Some manufacturers offer custom or specialty oil fired hot water heaters for specific needs or applications. These models usually come at a higher price point and may require additional installation or customization costs
  • It's important to note that prices may vary depending on factors such as brand reputation, warranty coverage, installation requirements, and geographic location. It's advisable to research and compare different models and brands to find the best combination of price, features, and reliability for your specific requirements
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Choosing the Perfect Oil Fired Hot Water Heater

  • Efficiency: One of the most crucial aspects to consider is the efficiency rating of the hot water heater. Look for models that have a high energy efficiency rating, as this will determine how effectively it converts oil into heat. An efficient hot water heater will not only save you money on fuel costs but also help reduce your environmental impact
  • Tank Size: The size of the tank is another important factor to consider. Determine your household's hot water needs and ensure that the tank size is adequate to meet your requirements. If you have a larger family or a high demand for hot water, you may need a larger tank capacity to ensure a sufficient supply
  • Durability and Warranty: It's essential to choose a hot water heater that is built to last. Look for models made from high-quality materials that are resistant to corrosion and have a long lifespan. Additionally, check the warranty offered by the manufacturer. A good warranty will provide you with peace of mind and protection in case of any issues that may arise

Step-by-step guide to efficiently operating your oil fired hot water heater

  • Familiarize yourself with the user manual: Start by reading the user manual provided with the oil fired hot water heater. This will give you a good understanding of its features, functions, and recommended maintenance procedures
  • Check the fuel supply: Before using the oil fired hot water heater, ensure that it is connected to a reliable fuel supply. Check the oil tank level and make sure it is adequately filled. If not, contact your oil supplier for a refill
  • Adjust the temperature settings: Most oil fired hot water heaters have adjustable temperature settings. Set the temperature to your desired level using the control panel or thermostat. It is recommended to keep the temperature at around 120 degrees Fahrenheit for optimal energy efficiency and safety
  • Remember, if you have any specific questions or concerns, it is always a good idea to consult with a professional plumber or technician who can provide you with personalized advice and guidance. Stay safe and enjoy the benefits of your oil fired hot water heater!

Frequently Asked Questions about Choosing the Best Oil Fired Hot Water Heater

How can I ensure the optimal performance and efficiency of my oil-fired hot water heater?

To ensure optimal performance and efficiency of your oil-fired hot water heater, there are a few key steps you can take:

  1. Regular maintenance: Schedule annual professional maintenance for your hot water heater. This will include cleaning the burners, inspecting the system, and checking for any potential issues. Regular maintenance helps keep your heater running efficiently and extends its lifespan.
  2. Keep the area around the heater clear: Make sure there is enough space around your hot water heater for proper ventilation. Clear away any clutter or obstructions that could obstruct airflow and cause the heater to work harder than necessary.
  3. Insulate hot water pipes: Insulating the hot water pipes connected to your heater can help minimize heat loss and improve efficiency. This ensures that hot water reaches your faucets faster and reduces the need for the heater to run for extended periods.
  4. Set the temperature appropriately: Find the ideal temperature setting for your hot water needs. Typically, a temperature of around 120 degrees Fahrenheit (49 degrees Celsius) is recommended for most households. This prevents excessive energy consumption while still providing sufficient hot water.
  5. Inspect the fuel supply: Regularly check your oil tank to ensure an adequate fuel supply. Running out of oil can cause damage to the heater and disrupt its performance. If you notice any leaks or issues, contact a professional for assistance.
  6. Consider upgrading to a newer model: If your current oil-fired hot water heater is old and inefficient, upgrading to a newer model may be a wise investment. Newer models often come with improved efficiency ratings and advanced features that can help reduce energy consumption and save you money in the long run.
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What are the signs that indicate it's time to replace an oil-fired hot water heater?

Sure! There are several signs that indicate it's time to replace an oil-fired hot water heater. Here are a few key signs to look out for:

  1. Age: The average lifespan of an oil-fired hot water heater is around 10 to 15 years. If your unit is approaching or has exceeded this range, it may be time to consider a replacement.
  2. Rust or corrosion: Check for any signs of rust or corrosion on the tank or its components. This could indicate that the unit is deteriorating and may soon start leaking.
  3. Leaks: If you notice water pooling around the base of your hot water heater, it's a clear indication of a leak. Leaks can occur due to cracks in the tank or faulty valves, and often warrant a replacement.
  4. Inefficient performance: If your hot water heater is no longer providing consistent hot water or takes longer to heat up, it may be a sign of internal issues. This could be due to sediment buildup, a malfunctioning thermostat, or other mechanical problems.
  5. Strange noises: Unusual banging, popping, or rumbling sounds coming from the hot water heater can indicate sediment buildup or a failing heating element. If these noises persist, it's advisable to have a professional inspect the unit.
  6. High energy bills: An old or malfunctioning hot water heater can be less energy-efficient, resulting in higher utility bills. If you notice a significant increase in your energy costs without any other clear explanation, it may be time to replace the unit.
Steve Donaldson Master HVAC technician
Steve DonaldsonMaster HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

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14 Comments
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  1. Thank you! I’m glad you found the roundup helpful. The AO Smith COF-385A is definitely a great choice, especially if you’re looking for a more affordable option. Let us know if you have any other questions!

  2. I noticed that all the options listed are from AO Smith. Are there any other brands you would recommend? I’m interested in exploring different options before making a decision.

    • That’s a great question! While AO Smith is known for its quality oil fired hot water heaters, there are certainly other brands worth considering. Some popular alternatives include Rheem, Bradford White, and Burnham. Feel free to check them out and see if any of their models suit your needs!

  3. I would love to know more about the energy efficiency of these water heaters. Are there any specific models that stand out in terms of energy savings?

    • Energy efficiency is definitely an important factor to consider when choosing an oil fired hot water heater. Among the models listed, the AO Smith COF-385A and COF-700A are known for their high energy efficiency ratings. They have features such as advanced insulation and efficient combustion systems that help reduce fuel consumption. If energy savings are a priority for you, these models are worth considering!

  4. This is a great roundup, but I was wondering if there have been any updates to the article since it was published. It’s always good to have the most up-to-date information.

    • Thank you for your feedback! We constantly strive to provide the most accurate and up-to-date information. Since this article was published, there haven’t been any major updates. However, we’ll keep an eye out for any new releases or noteworthy developments in the oil fired hot water heater market and update the article accordingly.

  5. Great roundup! I’ve been looking for a new oil fired hot water heater and this list is really helpful. I think I’ll go with the AO Smith COF-385A since it seems to have good reviews and is more affordable than the COF-700A. Thanks for the recommendations!

  6. Could you provide some tips on maintenance for oil fired hot water heaters? I want to make sure I take proper care of my investment to ensure it lasts as long as possible.

    • Absolutely! Proper maintenance is essential for the longevity and performance of your oil fired hot water heater. Some tips include regular inspection of the burner, cleaning or replacing the oil filter, checking for leaks, and flushing the tank periodically to remove sediment buildup. It’s also recommended to have a professional service the heater annually. Let us know if you need more detailed instructions!

  7. I recently installed the AO Smith COF-700S in my home and it has been fantastic so far! The water heats up quickly and I haven’t experienced any issues. Definitely a reliable choice.

    • That’s wonderful to hear! The AO Smith COF-700S is indeed a reliable and efficient oil fired hot water heater. It’s great that it’s working well for you and providing quick hot water. If you have any further feedback or questions, feel free to reach out. Enjoy your hot showers!

  8. The prices of these water heaters seem quite high. Are there any affordable options available? I’m on a tight budget.

    • I understand your concern about pricing. While some of the models listed may have higher price points, there are more affordable options available as well. You might consider looking into the AO Smith COF-315S or the Bock 72E with Carlin EZ-2HP Burner. These models offer good performance at a relatively lower cost. Make sure to compare the features and specifications to find the best fit for your budget!

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