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Best 400k Btu Natural Gas Pool Heater | Top 3 in 2024

With the pandemic setting in and people left with no other option than being locked inside their homes, a massive surge in spending quality pool time with family and friends came as no big a surprise. Since a lot of people showed keen interest in pools, the demand for pool heaters came in naturally. All in all, the last year and a half has been great for the pool industry. With our life still stuck in the midst of the pandemic and struggling to return to normal, the number of people relying on pools for relaxation and quality time is increasing exponentially. This leaves us with a prominent question – which pool heater to rely on? Now that you are here – your answer is just a read away.

Here, we have listed top 3 40000 BTU pool heaters after thorough research. These pool heaters rely on natural gas and are designed to deliver nothing but the best. Keep reading to learn about them in detail. Further, choosing one among them that best fits your requirements wouldn’t be difficult at all.

Hayward H400FDN Universal H-Series 400,000 BTU Pool and Spa Heater

 

Installation – Hayward H400FDN Universal H-Series 400,000 BTU Pool and Spa Heater requires just the front panel to get done with the installation. This throws light on how easy the whole installation process is. 

Flexibility – This pool heater from Hayward is flexible to the extent that it can easily adapt to both – new as well as existing pools and spas. So, you do not have to worry about the pool heater being the right match for your pool or not as long it is Hayward H400FDN by your side.

Hydraulic Performance – By virtue of the Patent Pending polymer header design and bypass valve design, the user can stay assured of a top-notch hydraulic performance.

Environmental friendly – Yet another remarkable feature of Hayward H400FDN Universal H-Series 400,000 BTU Pool and Spa Heater is that it is environmental friendly. Wondering how? Well, it is because this pool heater meets the NOx Emission standards set by the California South Coast Quality Air Management Commission for 2001 and the Texas Natural Resource Conservation Commission Code. With its Low NOx Emissions, the heater has made it into the list of environment friendly pool heaters.

Heat exchanger – You are definitely not compromising on the heating performance delivered, for this heater comes with a standard cupro nickel heat exchanger that promises value and reliability, both.

Energy efficient – The design of this pool heater is such that it reduces the circulation pump run time. This further paves the way for energy savings. You do not have to shell out heavy amounts to pay your bills when relying on Hayward H400FDN Universal H-Series 400,000 BTU Pool and Spa Heater.

Control panel – It comes with an easy to read LED control panel. Here, you get information pertaining to the temperature as well as the diagnostics for quick identification of those components that require immediate servicing. 

Pros & Cons

Pros
  • Flexible installation
  • Reliable
  • Energy efficient
  • Comes with an easy to read LED control panel
  • Superior hydraulic performance
Cons
  • A few users complained of the exchanger developing holes after considerable usage.
  • The customer support is not satisfactory.

Jandy Pro Series JXi 400K BTU Low-NOx Natural Gas Swimming Pool and Spa Heater – JXI400N

Design – This pool heater boasts of a lightweight design. This being light in weight, it doesn’t pose any problem as far as the portability is concerned. In addition to this, its compact design throws light on smaller footprint requirement.

Installation – Installing this pool heater is easier than one can imagine. The 180° rotatable top feature ensures that you do not have to deal with the hassle of rotating headers.

Thermal efficiency – Jandy Pro Series JXi 400K BTU Low-NOx Natural Gas Swimming Pool and Spa Heater – JXI400N boasts of 84% thermal efficiency rating.

Heat exchanger design – The entire heat exchanger design of this pool heater is worth a mention. The Copper fin heat exchanger tubes make is easier than ever for efficient heat transfer. The burner is made of stainless steel and talks volume about the robustness. Here, you get a blower-driven gas and air mixture that promises reliability and the inclusion of hot surface ignitor calls for consistent start – ups.

Control panel – Jandy Pro Series JXi 400K BTU Low-NOx Natural Gas Swimming Pool and Spa Heater – JXI400N comes with a digital control panel that is absolutely easy to operate. Here, one can go about controlling the temperature and also have access to the diagnostics with run-time and cycle meter, without any difficulty whatsoever.

Replacement – This pool heater grabs attention for yet another aspect – the replacement. Here, the 3-port header not only makes room for an easy plumbing but also acts as a drop-in replacement of MasterTemp, Max-E-Therm, and Jandy Pro Series pool heaters.

Warranty – Jandy Pro Series JXi 400K BTU Low-NOx Natural Gas Swimming Pool and Spa Heater – JXI400N has a warranty of a year.

Pros & Cons

Pros
  • It supports sidewall ventilation
  • The thermal regulator valve ensures a reliable, balanced flow and temperature control.
  • The components are corrosion resistant.
  • Easy to operate digital control panel
  • Robust heat exchanger design
  • Eco-friendly
  • Lightweight
  • Thermal efficient
Cons
  • Minor leaks after a few years
  • No labor warranty

Pentair 460737 MasterTemp 400K BTU Propane Gas High Performance Eco-Friendly Heater

Design – Pentair 460737 MasterTemp 400K BTU Propane Gas High Performance Eco-Friendly Heater boasts of a compact design that not only makes it easy to carry it from one place to another but also requires less space to store.

Fast heating – With this pool heater, you no longer have to wait for hours to heat up the water. The pre-mixed system with a highly efficient air and gas mixture ensures that the pool is heated up in no time.

Energy efficient – This being an energy efficient pool heater ensures that you do not spend much on the electricity bills.

Noise levels – Pentair 460737 MasterTemp 400K BTU Propane Gas High Performance Eco-Friendly Heater is engineered in a manner that the operation is utterly smooth and quiet thereby enabling you and everyone around can work without getting disturbed.

Control panel – The digital control panel does not pose any problem while operating. Anyone can do it without any difficulty. The display is easy-to-view and rotates as well, thus throwing light on how user-friendly the device is.

Safety – This is where Pentair 460737 MasterTemp 400K BTU Propane Gas High Performance Eco-Friendly Heater needs a special mention. It comes with a water pressure switch that senses the pump is running in order to prevent overheating

Eco-friendly – With low NOx emissions, this pool heater is certified as environment friendly device.

Pros & Cons

Pros
  • Digital, easy-to-view and operate display.
  • The unit prevents over heating issues.
  • Eco-friendly
  • Smooth and quiet operation
  • Energy efficient
  • Fast heating
  • Compact design
Cons
  • The plastic housing could be a problem.

Technical Specifications

ParameterHayward H400FDN Universal H-Series 400,000 BTU Pool and Spa HeaterJandy Pro Series JXi 400K BTU Low-NOx Natural Gas Swimming Pool and Spa Heater - JXI400NPentair 460737 MasterTemp 400K BTU Propane Gas High Performance Eco-Friendly Heater
BrandHaywardJandyPentair
ManufacturerHaywardJandyPentair
Model numberH400FDNJXi400N460737
Dimensions37 x 24 x 29.5 inches40 x 24 x 28.5 inches36 x 25 x 30 inches
Weight197 pounds151 pounds128 pounds
ColorGrey and blackGrey and blackWhite
Installation requiredYesYesYes
Fuel TypeNatural gasNatural gasNatural gas
Ignition TypeElectricalElectricalElectrical
BTU Rating4,00,0004,00,0004,00,000
Heat ExchangerCopper fin heat exchangerCopper fin heat exchangerCopper fin heat exchanger
Pool TypeIn-groundIn-groundIn-ground
Control panelDigitalDigitalDigital
Pool Gallons (approx)400004000040000
BurnersStainless steelStainless steelStainless steel
Corrosion and rust resistantYesYesYes
Energy efficientYesYesYes
DisplayLEDLCDLCD
Environment friendlyYesYesYes
CertificationsLow NOx CertifiedLow NOx CertifiedLow NOx Certified
Warranty1 year2 year2 years limited warranty
PriceUnder $5000Under $3000Under $3001

Conclusion

All these models are a perfect blend of convenience, reliability and efficiency that you would want in a pool heater. They make sure that your pool is heated up faster so that you do not have to wait for long. In addition to all these, they are loaded with features – on the basis of which they make it into the list of to 3 40000 BTU pool heaters. High performance is assured in each of the three pool heaters. Go ahead! Pick the one that meets your requirements.

Frequently asked questions

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