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Best 400K Btu Pool Heater (2024 Update)

If you’re looking for a pool heater that can provide you with a comfortable and enjoyable swimming experience, then a 400,000 BTU heater might be just what you need. But before you rush out to purchase the first thing you see, there are a few factors you should consider to ensure you get the best value for your money.

Firstly, you need to assess the size of your pool. A 400k BTU heater is best suited for large pools, and it may not be necessary for smaller ones. Secondly, you need to think about the fuel source for the heater. You can choose between natural gas, propane, or electric heaters. Each fuel source has its advantages and disadvantages, so you should consider your individual needs before making a decision.

So, what are the benefits of investing in a 400k BTU pool heater? Do you want to extend your pool season into the cooler months? Are you looking for a reliable heating option that quickly heats up your pool? Are you tired of constantly shivering when you take a dip? These are just a few questions you should ask yourself before deciding if a 400k BTU pool heater is the right choice for you.

Overall, a 400k BTU pool heater can be an excellent investment for those with large pools who wish to extend their swimming season. Be sure to assess your individual needs and consider all of your options before making a decision. With the right research and considerations, you can find the perfect pool heater that provides a comfortable swimming environment.

10 Best 400K Btu Pool Heater

# Product Image Product Name Product Notes Check Price
1
Ideal for heating in-ground pools and spas with propane as the fuel source.
2
This product is ideal for heating in-ground pools and spas with natural gas.
3
Ideal for efficiently heating large outdoor pools using propane fuel with digital ignition control system.
4
Ideal for heating mid-to-large sized swimming pools, spas, bathtubs, and in-ground or above-ground pools wired to three-phase 40A GFCI.
5
This product is ideal for heating large natural gas-powered swimming pools quickly and efficiently.
6
This product is ideal for heating swimming pools, spa pools, and bathtubs up to 40,000 gallons.
7
The product is ideal for heating small to medium-sized swimming pools with propane gas.
8
This product is ideal for heating outdoor swimming pools that run on natural gas.
9
The product is ideal for heating outdoor pools and maintaining a comfortable swimming temperature.
10
The product is ideal for heating large swimming pools using natural gas as a fuel source.
Ideal for heating in-ground pools and spas with propane as the fuel source.
This product is ideal for heating in-ground pools and spas with natural gas.
Ideal for efficiently heating large outdoor pools using propane fuel with digital ignition control system.
Ideal for heating mid-to-large sized swimming pools, spas, bathtubs, and in-ground or above-ground pools wired to three-phase 40A GFCI.
This product is ideal for heating large natural gas-powered swimming pools quickly and efficiently.
This product is ideal for heating swimming pools, spa pools, and bathtubs up to 40,000 gallons.
The product is ideal for heating small to medium-sized swimming pools with propane gas.
This product is ideal for heating outdoor swimming pools that run on natural gas.
The product is ideal for heating outdoor pools and maintaining a comfortable swimming temperature.
The product is ideal for heating large swimming pools using natural gas as a fuel source.

1. Hayward Propane Pool Heater – 400k Btu

The Hayward Universal H-Series 400,000 BTU Propane Heater is the perfect choice for in-ground pools and spas with a surface area of up to 1,200 square feet, where natural gas is available. Its low environmental impact makes it an ideal option for pools and spas located in areas where low-NOx emissions are required.

This premium propane heater delivers superior heating performance that ensures years of reliable and long-lasting comfort for pool and spa owners. With exceptional protection against corrosion and premature failure caused by unbalanced water chemistry, the Universal H-Series boasts of excellent durability and longevity.

The efficient and industry-leading design of the Hayward Universal H-Series 400,000 BTU Propane Heater reduces circulation pump run time, providing energy savings to pool and spa owners. This efficient design ensures that pool and spa owners can enjoy the benefits of a warm and comfortable pool or spa, without worrying about high energy bills.

The intuitive front control panel of the Hayward Universal H-Series 400,000 BTU Propane Heater provides easy operation, service, and maintenance. This easy-to-use feature ensures that pool and spa owners can easily control and maintain their heater, without any hassle.

2. Hayward Universal Gas Pool Heater – 400k Btu

The Hayward Universal H-Series 400,000 BTU Natural Gas Heater is the perfect solution for in-ground pools and spas that require a surface area of up to 1,200 ft. and have natural gas available. It is also a great choice for those looking for low-NOx emissions in their pools and spas.

This premium heater delivers fast and reliable heating performance for long-lasting comfort. It is built to last and boasts exceptional corrosion protection, preventing premature failure caused by unbalanced water chemistry.

The energy-efficient design of the Universal H-Series reduces circulation pump run time, providing energy savings that make it an economical choice for pool and spa owners.

The front control panel of this heater is intuitive and easy to use, making operation and maintenance a breeze. This high-quality heater is built to provide years of exceptional performance and comfort.

3. Raypak 406,000 Btu Digital Electronic Ignition Propane Pool Heater

Introducing the 406,000 BTU Propane Digital Pool and Spa Heater – the perfect addition to your outdoor oasis! This high-quality pool and spa heater is designed to provide you with the ultimate control and convenience.

With its microprocessor-controlled thermostat, you can set the temperature precisely to your liking and then forget about it. The heater will maintain the perfect temperature without any need for intervention on your part.

The cabinet and internals of this heater are made from non-corrosive, rust-resistant materials that are built to last. Features such as PolyTuf powder coating, polymer headers, and an all copper-fin-tube heat exchanger ensure that this heater will stand up to even the harshest outdoor conditions.

In addition, the heater features a stainless steel tube sheet, 2 inch CPVC water connections, burner tray and fire tile. These high-quality components work together to provide you with a reliable and efficient heating solution for your pool or spa.

4. Heatmaster Pro For Large Pools And Spas

Looking for a reliable and efficient heating system for your pool or hot tub? Look no further than this 24KW pool heater from Coasts. With a powerful 85,000 BTU/hr output, this heater is capable of maintaining a comfortable temperature range of 71.6 °F to 122 °F (22 °C to 50 °C) in coastal climates.

This heater is suitable for use in a variety of pool sizes, including in-ground pools up to 20,000 gallons and 200 square feet, and above-ground pools up to 27 feet round or 18 feet by 33 feet oval. Whether you're located in Long Island, NY or Corpus Christi, TX, this heater is designed to meet your needs. Not sure if this model is right for your pool or hot tub? Simply send Coasts your zip code and pool size, and they'll help you find the right product for your needs.

Coasts is a trusted name in pool heaters, and this model is no exception. It's designed, engineered, manufactured, and serviced by Coasts, ensuring that you're getting a high-quality product that's built to last. Plus, this heater is suitable for use with all types of hot tubs, above-ground pools, and in-ground swimming pools.

This heater is wired to three-phase 40A GFCI, and uses American voltage of 60 HZ. Use it with your water pump for optimal performance. Don't let chilly water keep you out of your pool or hot tub any longer – invest in a Coasts pool heater today!

5. Raypak 406,000 Btu Digital Electronic Ignition Natural Gas Pool Heater

This heater is designed to thrive in diverse weather conditions, making it an ideal solution for environments that demand efficiency, convenience, and versatility. Its intermittent spark ignition pilot safety controls ensure that the pilot only comes on when there is a demand for heat, maximizing energy savings.

Constructed from cutting-edge materials, this heater is engineered to dissipate heat quickly, even after being turned off. This unique feature eliminates the need for expensive metal heat sinks when installing the heater.

With a model number of P-R406A-EN-C and part number 009219, this heater is a top-of-the-line solution that is guaranteed to meet all your expectations. It's worth noting that this item cannot be shipped to the state of California.

6. Triple-Phase Pool & Spa Heater

The pool heater by Coasts is a top-of-the-line product that boasts an impressive 220,000 BTU/hr in coastal climates, making it a reliable choice for maintaining the perfect temperature for your pool. It can handle a wide range of temperatures from 71.6°F to 122°F (22°C to 50°C). The heater is suitable for in-ground pools up to 40,000 gallons and 300 sq. ft. or above-ground pools that are 27' round or 18' x 33' oval in size, spanning across Long Island, NY to Corpus Christi, TX.

If you are unsure about the suitability or performance rating of the heater for your area, you can send your zip code and pool size to the manufacturer, and they will help you size it appropriately. The heater is designed, engineered, manufactured, and serviced by Coasts, ensuring that you are getting a high-quality product that is reliable and efficient.

In addition to its use for pools, the heater is also suitable for hot tubs and can be used with both above-ground and in-ground swimming pools. It has a voltage of 54KW and runs on 60 Hz American Voltage. The heater is wired to a three-phase 40A GFCI and can be used with a water pump, making it a versatile and user-friendly option for pool owners.

7. Raypak 014786-156a Propane Gas Pool Heater 150k Btu For 0-1999ft Elevation

The 014786 model number P-R156A-EP-C in black color is a highly efficient and sophisticated product that is designed to meet your needs. With its sleek and elegant appearance, this product is perfect for those who are looking for both style and functionality.

The product is incredibly easy to use and user-friendly, making it an ideal option for individuals of all ages. The black color of this product is not only trendy but also versatile, making it a great addition to any setting.

The 014786 model number P-R156A-EP-C is designed with high-quality materials that ensure durability and longevity. The product is built to last and withstand even the toughest of conditions.

In terms of specifications, the product measures [insert measurements here]. Its [insert other parameter] ensures that you get the best performance out of the product.

8. Raypak 406,000 Btu Digital Natural Gas Pool Heater With Cupro Nickel Ray-014941

The 014941 gas pool and spa heater is a top-of-the-line heating solution that is designed to provide the perfect temperature for your pool or spa at all times. With a model number of P-R406A-EN-X, this heater is crafted from high-quality cupro-nickel, which ensures that it lasts for years without any corrosion or rust.

One of the standout features of this heater is its pagoda design, which ensures that it stays active and functional even in harsh weather conditions. This is a great benefit for those who live in areas where the weather can be unpredictable and extreme. Regardless of the weather outside, this heater will continue to work efficiently and effectively.

The 014941 gas pool and spa heater is also equipped with a microprocessor controlled thermostat, which allows for precise temperature control. This means that you can easily set the temperature of your pool or spa to your desired level and rest assured that it will remain at that temperature until you decide to change it.

In terms of specifications, the 014941 gas pool and spa heater has a part number of 014941 and a model number of P-R406A-EN-X. It is also crafted from cupro-nickel, which is a high-quality material that is built to last. The pagoda design ensures that it can withstand harsh weather conditions, and the microprocessor controlled thermostat allows for precise temperature control.

9. Hayward W3h135fdp H-Series Pool Heater, Beige

Looking for a reliable and efficient heat exchanger for your pool? Look no further than this top-of-the-line product. This heat exchanger is built to last, with a durable cupro nickel construction that ensures it will withstand the test of time.

Not only is this heat exchanger built to last, but it also boasts industry-leading hydraulic performance, with a faster speed-to-heat capability than other models on the market. This means that you'll be able to enjoy your pool sooner, without having to wait for the water to warm up.

The electronic panel on this heat exchanger is intuitive and easy to operate, making it simple to adjust the temperature to your desired level. And with the exclusive "Totally Managed" cupro nickel heat exchanger water flow, you can be sure that your pool water is being heated efficiently and effectively.

Another great feature of this heat exchanger is its low NOx emissions, which meet clean air quality standards. This means that you can enjoy your pool without worrying about harming the environment.

10. Mastertemp Pool Heaters 400k Btu – Natural Gas

Looking for a reliable and efficient heating system that can withstand the test of time? Look no further than this top-of-the-line product.

Crafted with a tough, rust-proof exterior, this heating system is built to last. No need to worry about wear and tear, as this product is designed to withstand even the harshest of weather conditions.

Thanks to its premix combustion technology, this heating system is able to warm up quickly and efficiently. Say goodbye to long wait times and hello to instant warmth.

Safety is always a top priority, which is why this heating system comes equipped with built-in safety features to ensure system protection. You can rest easy knowing that your family and home are always safe.

The controls on this heating system are rotatable, easy-to-use, and intuitive. No need to fumble around with confusing buttons or knobs; this product is designed to be user-friendly.

And the best part? This heating system is certified for both outdoor and indoor installation, giving you the flexibility to choose the perfect location for your needs. With its impressive parameters and specifications, this product is an excellent choice for anyone looking for a reliable and efficient heating system.

Best 400K Btu Pool Heater FAQs

Are there any safety concerns with using a 400k BTU pool heater?

Yes, there are safety concerns with using a 400k BTU pool heater. The primary concern is the risk of fire or explosion due to the high heat output. It is important to ensure that the heater is installed and operated correctly, and that all safety features are in place and functioning properly. This includes proper ventilation to prevent the buildup of carbon monoxide and other toxic gases, as well as regular maintenance to ensure that the heater is operating efficiently and safely. It is also important to follow all manufacturer guidelines and local building codes when installing or using a pool heater. Additionally, it is recommended to have a professional inspect and service the heater regularly to ensure it is operating safely and efficiently.

Can a 400k BTU pool heater be used for a commercial pool?

The answer to this question would depend on the size of the commercial pool in question. A 400k BTU pool heater is capable of heating a residential pool up to approximately 40,000 gallons in size. However, commercial pools are typically much larger than residential pools and may require a higher BTU output to effectively heat the water.

The size of the pool heater needed for a commercial pool will depend on several factors, including the size of the pool, the desired temperature increase, the climate in which the pool is located, and other factors that may affect the heating efficiency of the pool heater.

It is recommended that individuals consult with a licensed pool contractor or heating professional to determine the appropriate size and type of pool heater needed for a commercial pool. They can assess the specific needs of the pool and recommend a pool heater that is capable of meeting those needs efficiently and effectively.

How does a 400k BTU pool heater compare to a smaller or larger model?

When it comes to pool heaters, the size of the heater is directly related to its heating capacity. A 400k BTU pool heater is a larger model which can heat up a larger pool than a smaller heater.

A smaller pool heater with a lower BTU output, such as a 100k or 200k model, may be sufficient for a smaller pool or a pool in a warmer climate. However, a larger pool or a pool in a cooler climate may require a 400k BTU heater for optimal heating.

On the other hand, a larger pool heater with a higher BTU output, such as a 500k or 600k model, may be overkill for most pools and could end up costing more money in terms of upfront cost and energy consumption.

Overall, the size of the pool heater should be determined by the size of the pool and the climate in which it is located. A 400k BTU pool heater is a good choice for larger pools or those located in cooler climates, but it may not be necessary for smaller pools or those in warmer climates.

How long does it take for a 400k BTU pool heater to heat up a pool?

The time it takes for a 400k BTU pool heater to heat up a pool depends on several factors. The size of the pool, the starting temperature of the water, and the desired temperature are all important variables. As a general rule, a 400k BTU pool heater can heat up a standard-sized swimming pool (approximately 20,000 gallons) by about 1 degree Fahrenheit per hour. So, if you want to raise the temperature of your pool from 70°F to 80°F, it would take approximately 10 hours to do so. However, if your pool is larger or colder, it may take longer to heat up. It's also worth noting that using a pool cover can help to retain heat and reduce the amount of time it takes to warm up the water.

How much does it cost to install a 400k BTU pool heater?

The cost of installing a 400k BTU pool heater can vary depending on various factors such as location, brand, and additional installation charges. On average, a 400k BTU pool heater can cost anywhere from $2,500 to $6,000. However, this cost does not include the additional expenses that may be incurred such as permits, electrical work, and gas line installation. It is always recommended to contact a licensed pool heater installer to get an accurate estimate that includes all the necessary installation charges. Additionally, it is important to research and compare different brands and models to ensure you are getting the best value for your money. Investing in a high-quality pool heater can provide significant cost savings in the long run by reducing energy costs and extending the lifespan of your pool equipment.

Is it necessary to have a professional install a 400k BTU pool heater?

Yes, it is highly recommended to have a professional install a 400k BTU pool heater. This is because pool heaters require specific knowledge and expertise to install properly. A professional installer will have the necessary training and experience to ensure that the heater is installed correctly and safely.

Additionally, a professional installer can help you select the right size and type of heater for your pool, as well as provide guidance on proper maintenance and care. They can also ensure that the heater is installed in compliance with local building codes and regulations.

Attempting to install a 400k BTU pool heater on your own can be dangerous and may result in damage to your pool or equipment. It is always best to hire a professional to ensure that your pool heater is installed correctly and functions properly.

What are the top-rated 400k BTU pool heaters on the market?

There are several top-rated 400k BTU pool heaters available on the market. One of the most popular options is the Pentair 460805 MasterTemp. This heater is known for its high efficiency, easy-to-use digital controls, and reliable performance. Another popular option is the Hayward H400FDN Universal H-Series. This heater features a cupro nickel heat exchanger for added durability and resistance to corrosion, as well as a digital LED control panel for easy operation. The Jandy JXi 400N is also a highly rated option, with its compact size, energy-efficient design, and advanced digital control system. Other top-rated 400k BTU pool heaters include the Raypak 406A, Sta-Rite SR400HD, and Rheem P-M406A-EP-C. When choosing a pool heater, it's important to consider factors such as energy efficiency, durability, ease of use, and overall performance to find the best option for your specific needs and budget.

What is the lifespan of a 400k BTU pool heater?

The lifespan of a 400k BTU pool heater can vary depending on a number of factors, including the quality of the unit, how often it is used, how well it is maintained, and the local climate. Generally speaking, a well-maintained pool heater can last anywhere from 5-15 years, with some units lasting even longer. However, it's important to note that as a pool heater ages, it may become less efficient and require more frequent repairs. To maximize the lifespan of your pool heater, it's important to have it serviced regularly by a qualified professional, and to follow the manufacturer's recommended maintenance schedule. Additionally, you may want to consider investing in a high-quality unit from a reputable manufacturer, as these tend to be more durable and reliable than cheaper, lower-quality models.

What is the most energy-efficient 400k BTU pool heater?

When it comes to choosing an energy-efficient 400k BTU pool heater, there are a few options available in the market. One of the most efficient options is the Pentair MasterTemp 400 pool heater, which boasts an impressive 84% thermal efficiency rating. It uses a digital temperature controller to help maintain the desired temperature, and its compact design makes it easy to install and operate.

Another option to consider is the Jandy Pro Series JXi 400 pool heater, which has a 83% thermal efficiency rating. It uses a copper heat exchanger to conduct heat efficiently, and its compact design makes it easy to install and maintain.

Lastly, the Hayward H400FDN pool heater is also a great option, with an 84% thermal efficiency rating. It features a forced-draft combustion system that allows for high performance and low emissions, and its corrosion-resistant heat exchanger ensures long-lasting durability.

Ultimately, the choice of the most energy-efficient 400k BTU pool heater will depend on your specific needs and preferences. It's important to do your research and consult with a professional before making a purchase.

What type of fuel does a 400k BTU pool heater use?

A 400k BTU pool heater typically uses natural gas or propane as its fuel source. Both natural gas and propane are commonly used for heating swimming pools because they are efficient and cost-effective. Natural gas is a popular choice for pool heaters because it is readily available in many areas and is generally less expensive than propane. Propane is often used in areas where natural gas is not available or where it is more expensive. Both fuels burn cleanly and efficiently, producing heat that can quickly warm up a large pool. It's important to note that the type of fuel used by a pool heater will depend on the specific model and manufacturer, so it's always a good idea to check with the manufacturer's specifications and recommendations before purchasing a pool heater.