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48 Best 400k btu pool heaters in 2021: According to Experts.

You could get any random 400k btu pool heaters, but if you’re looking for expert advice on choosing the best one for your needs then you’ve arrived at the right place.

It doesn’t matter what your 400k btu pool heaters needs are or what your budget is, because I’ve done an in-depth analysis to include the best-rated options suitable for diversified usage needs and different budget ranges.

To make this list, I’ve spent 59 hours researching 400k btu pool heaters from the best brands such as: Pentair, Hayward, Puri Tech.

Note: Make sure that option you’re choosing has all the features you need. Afterall, is there any point in purchasing something that’s not usable?

48 Best 400k btu pool heaters in 2021: After 59 Hours of Research

To make this list an unbiased resource for choosing the best 400k btu pool heaters, I contacted 14 experts and discussed various aspects to consider. After a huge discussion, I went across customer reviews, researched the reputed brands, and a lot of other things. Because my aim is to recommend products that are highly value for your money.

1. Hayward W3H400FDN Universal H-Series 400,000 BTU Natural Gas Pool and Spa Heater for In-Ground Pools and Spas -Patio, Lawn & Garden

By Hayward

  • EASY-TO-USE: Intuitive front control panel provides easy operation, service and maintenance.
  • where natural gas is available
  • Its low environmental impact makes it ideal for pools and spas located where low-NOx emissions are required.
  • CORROSION PROTECTION: The Universal H-Series boasts exceptional protection against corrosion and premature failure caused by unbalanced water chemistry.
  • PREMIUM PERFORMANCE: The Hayward Universal H-Series 400,000 BTU Natural Gas Heater delivers fast premium heating performance for years of reliable, long-lasting comfort.
  • BEST FOR: In-ground pools and spas with a surface area up to 1,200 ft
  • ENERGY SAVINGS: The efficient, industry-leading design reduces circulation pump run time to provide energy savings.

2. Raypak 406,000 BTU Digital Electronic Ignition Natural Gas Pool Heater -Patio, Lawn & Garden

By Raypak

  • LCD digital display provides accurate temperature
  • Monitors operational status as well as service diagnostics
  • High-wind resistance
  • Model Number: P-R406A-EN-C
  • Part Number: 009219

3. Hayward W3H400FDP Universal H-Series 400,000 BTU Pool and Spa Heater, Propane -Patio, Lawn & Garden

By Hayward

  • BEST FOR: In-ground pools and spas with a surface area up to 1,200 ft
  • ENERGY SAVINGS: The efficient, industry-leading design reduces circulation pump run time to provide energy savings.
  • CORROSION PROTECTION: The Universal H-Series boasts exceptional protection against corrosion and premature failure caused by unbalanced water chemistry.
  • EASY-TO-USE: Intuitive front control panel provides easy operation, service and maintenance.
  • Its low environmental impact makes it ideal for pools and spas located where low-NOx emissions are required.
  • PREMIUM PERFORMANCE: The Hayward Universal H-Series 400,000 BTU Propane Heater delivers premium heating performance for years of reliable, long-lasting comfort.
  • where natural gas is available

4. Raypak 406,000 BTU Digital Electronic Ignition Propane Pool Heater -Patio, Lawn & Garden

By Raypak

  • Features PolyTuf powder coating, polymer headers, and an all copper-fin-tube heat exchanger
  • 406,000 BTU propane digital pool and spa heater
  • Also features a stainless steel tube sheet, 2 inch CPVC water connections, burner tray and fire tile
  • Cabinet and the internals are non-corrosive and rust resistant
  • Microprocessor-controlled thermostat can be set precisely to your liking , set it and forget it

5. Pentair EC462025 MasterTemp 125 125,000 BTU Compact Energy Efficient Swimming Pool and Spa Natural Gas Heater for Small Pools Up to 15,000 Gallons -Patio, Lawn & Garden

By Pentair

  • SPECIFICATIONS: Voltage: 120/240V; Intake/discharge plumbing: 1.5-inch; 0.75-inch gas line up to 50 feet from source (not included); Dimensions (L x W x H): 31.5 x 21 x 23 inches; Weight: 80 pounds
  • THOUGHTFUL, USER-FRIENDLY DESIGN:: Rotating digital display allows for any installation rotation and is easy to read; User-friendly indicator lights allow for simple system operation and monitoring; Corrosion and UV-resistant housing deliver durable, lasting use
  • COMPACT AND EFFICIENT: Compact design with 82-percent efficiency as compared to larger pool heaters; Quiet operation makes sure not to impose on leisure pool time
  • SAFETY FEATURES: Water pressure and stack flue sensor for overheat prevention, auto shut-off when the temperature exceeds factory limits, and manual shut-off for servicing; Certified for Low NOx emissions
  • GREAT FOR SMALLER POOLS: Natural gas heater boasts 125,000 BTUs, designed for smaller bodies of water up to 15,000 gallons

6. EcoSmart SMART POOL 27 Electric Tankless Pool Heater, 27kW, 240 Volt, 112.5 Amps with Self Modulating Technology -Pool Heaters

By Ecosmart US

  • Flow Activation
  • Eco smart Pool Heaters are compact and easy to install for a new or existing pool
  • Can be used as an alternative to or booster to heat pump.
  • Activation Flow – 12 +/- 2 GPM
  • Compatible with Eco smart Remote Control
  • wattage: 27000.0
  • Set your temperature digitally to increments of 1-Degree
  • Set it and forget it.

7. Hayward IDXL2ICB1931 Integrated Control Board Replacement for Hayward H-Series Low Nox and Hot Tub Heater -Patio, Lawn & Garden

By Hayward

  • Integrated control board replacement
  • New part incorporated on all IDL Heaters built after 9/20/04
  • Fits hayward universal h-series low nox induced draft heater models h250idl2, h350idl2, h400idl2
  • Also fits hayward universal h-series low nox induced draft heater
  • Weighs 18-1/2-pound

8. Raypak B-R266A-EP-X 266K BTU Natural Gas #59 ASME Cupro Nickel Commercial Pool Heater 017420 -Patio, Lawn & Garden

By Raypak

  • Digital display screen
  • Electronic ignition
  • Part Number: 017420
  • ASME rated for commercial swimming pools and spas
  • Model Number: B-R266A-EP-X

9. SunHeater Pool Heating System Two 2’ x 20’ Panels – Solar Heater for Inground and Aboveground Made of Durable Polypropylene, Raises Temperature, 6-10°F, S240U -Patio, Lawn & Garden

By SunHeater

  • It’s an efficient and cost-effective method to heat your pool.
  • SOLAR POOL HEATER – The SunHeater Solar Pool Heating System allows you to capture free heat from the sun’s rays to effectively raise your pool water temperature
  • This system can raise the water temperature 6-10 degrees F and extend your pool season by weeks!
  • EASY TO INSTALL – This pool solar heater uses your existing filtration system and has 4 end caps, 2 elbows for flex hose connection, 6 stainless steel hose clamps, 1 roll of Teflon tape, and rubber connector hoses.
  • It’s a universal system that works for pools up to 31’ round or 18’ x 36’.
  • DIMENSIONS – The SunHeater Solar Pool Heater includes two 2’ x 20’ panels, made of durable polypropylene
  • It offers rigid flexibility, allowing panels to expand and contract with changing temps, giving it the strength needed to last.
  • TUBE ON WEB DESIGN – The tube-web-tube design allows the SunHeater to capture the most sun possible, maximizing square footage
  • EXTENDS POOL SEASON – Your pool’s pump pushes the water through the panel’s many tubes where it’s warmed by the sun and then returned into the pool

10. Intex Solar Heater Mat for Above Ground Swimming Pool, 47in X 47in -Patio, Lawn & Garden

By Intex

  • Eco-friendly solar technology increases temperature of the pool water by approx
  • 3 ~ 5 DegreeC (5 ~ 9 DegreeF) depending on weather condition.
  • Bypass valve
  • 1 ¼” (32mm) hose attachment points, includes 1 adaptor A and 1 adaptor B for 1 ½” hose connection.
  • Suitable for above ground pools up to 8000 gal (30,280L)
  • 1m sq (11ft sq) surface to absorb sun’s rays.
  • Includes: 0.5m (1 1/4″ / 32mm diameter) connecting hose
  • Dimensions: 1.2m X 1.2 m / 47 1/4in; X 47 1/4in.
  • Simple hook up, compatible with filter pump up to 1/2 hp or pump flow rate < 2500 gal/hr (9463 L/hr).

11. Pentair 460735 MasterTemp 300K BTU Propane Gas High Performance Eco-Friendly Heater -Patio, Lawn & Garden

By Pentair

  • MasterTemp is certified for low NOx emission and outperforms industry standards; Measures 36-inch length by 30-inch height by 25-inch width
  • Manual gas shut-off when service is required
  • 300K BTU propane gas high performance heater
  • Best-in-class energy efficiency
  • Heats up fast so no long waits before enjoying your pool or spa

12. SunHeater S120U Universal Solar Pool Heater 2 by 20-Feet, Black -Patio, Lawn & Garden

By SunHeater

  • Simple DIY installation; for in ground or above ground pools
  • Uses existing pool pump
  • Installs on roof, rack, ground or fence
  • Additional kits or plumbing may be required.
  • Patented web design for maximum exposure to sun’s rays
  • Raises pool water temperature 6-10 degrees F

13. SunHeater Aboveground Pool Heating System, Includes Two 2’ x 20’ Panels (80 sq. ft.) – Solar Heater Made of Durable Polypropylene, Raises Temperature Up to 15°F – S421P, Black -Patio, Lawn & Garden

By SunHeater

  • TUBE-ON-WEB DESIGN – The tube-on-web design allows Sunheater to capture the most sun possible, maximizing square footage
  • EXTENDS POOL SEASON – Your pool’s pump pushes the water through the panel’s many tubes where it’s warmed by the sun and then returned to the pool
  • ft) and is perfect for heating aboveground pools that measure up to 31’ round or 18’ x 36’ oval.
  • This system can raise the water temperature up to 15°F and extend your pool season by weeks!
  • DIMENSIONS – This Sunheater Solar Pool Heater System includes two 2’ x 20’ panels (80 sq
  • EASY TO INSTALL – This solar pool heater uses your existing filtration system & comes with the necessary plumbing fixtures to connect to a rigid wall aboveground pool using flex hoses (hard plumb installations will require additional parts not included).
  • It offers rigid flexibility, allowing panels to expand and contract with changing temps, giving it the strength needed to last.
  • SOLAR POOL HEATER – The Sunheater Solar Pool Heating System allows you to capture free heat from the sun’s rays to effectively raise your pool water temperature
  • It’s an efficient and cost-effective method to heat your aboveground pool.

14. Raypak 406,000 Btu Digital Natural Gas Pool Heater with Cupro Nickel Ray-014941 -Patio, Lawn & Garden

By Raypak

  • Part Number: 014941
  • Cupro-nickel gas pool and spa heater
  • Microprocessor controlled thermostat
  • Model Number: P-R406A-EN-X
  • Pagoda design ensures heater stays active in harsh weather conditions

15. Hayward W3HP21404T HeatPro 140,000 BTU Pool Heat Pump for In-Ground Pools -Patio, Lawn & Garden

By Hayward

  • ECONOMICAL HEATING: Using the surrounding air to heat the pool, HeatPro is more economical than propane, natural gas and electric heaters for maintaining the ideal water temperature.
  • UV-resistant body panels are impervious to corrosion and deterioration
  • Non-corrosive design makes it durable for coastal climates.
  • CORROSION RESISTANT: Titanium heat exchanger ensures maximum heat transfer and provides excellent salt water and chemical corrosion resistance
  • BEST FOR: In-ground pools that are used regularly and benefit from maintaining an ideal consistent temperature
  • TRUSTED BRAND: With over 80 years of experience, Hayward is an industry leader in manufacturing advanced pool equipment.
  • UNPARALLELED DURABILITY: Ultra Gold corrosion-resistant technology provides unparalleled durability, even in harsh coastal environments.

16. VINGLI Solar Pool Heater Above Ground Domed Solar Powered Swimming Pool Heater Contour Pool Heating Coil -Patio, Lawn & Garden

By VINGLI

  • Dome Design & Heat QuicklyIf you want to heat the water quikly, please remove the cover
  • The hose mounts are easy to use
  • Easy to Install This solar pool heater install was fairly easy
  • More important, the heater hose are solid and don’t leak.
  • It is eco-friendly
  • Heat Well & Eco-friendly VINGLI solar heater can keeping the water warm quickly and longer if you use three or more our heater linked together in the same time
  • Note: Water pump pressure does not exceed 0.8, air pressure 35PSI
  • This solar powered heater protective cover to go over the coil for extra protection and to keep it clear from debris
  • It has 2 foldable legs on the bottom so that you can prop it up to align the coil with the sun for maximum efficiency, and it is also easy to store if you don’t use it
  • Hassle Free Warranty- VINGLI pool solar heater offer you 1-year warranty, 100% money back guarantee, and 24-hours friendly customer service
  • Please contact us send you additional soft hose if you need
  • Space Saving & Compact – The compact design and small footprint of the swimming pool solar heater really easy to store
  • Any problem please contact us without hesitation

17. Pentair 42002-0024S Stack Flue Sensor Replacement Pool and Spa Heater Electrical Systems -Patio, Lawn & Garden

By Pentair

  • Fits Pentair MasterTemp pool and spa heater electrical systems
  • Measures 6-inch length by 6-inch height by 6-inch width
  • Stack flue sensor replacement
  • Also fits Pentair Sta-Rite Max-E-Therm pool and spa heater electrical systems model SR200, SR333, SR400

18. Pentair 42002-0007S Control Board Kit Replacement NA and LP Series Pool/Spa Heater Electrical Systems -Patio, Lawn & Garden

By Pentair

  • Also fits Pentair Sta-Rite Max-E-Therm NA and LP-Series pool and spa heater electrical systems
  • Fits Pentair MasterTemp NA and LP Series Pool and Spa Heater Electrical Systems
  • Measures 6-inch length by 6-inch height by 6-inch width
  • Control board kit replacement

19. Smart Pool S601 Pool Solar Heaters, Pack of 1, Black -Patio, Lawn & Garden

By SmartPool

  • Solar heater features 80 square feet of solar panels
  • Direct Flow System – One Header Hole for Each Heating Tube
  • Raises Pool Water Temperature 6-10°F (4-6°C)
  • Installation kit required (Sold Separately)
  • Keep your pool warm with a polypropylene heat collector
  • Pool accessory is perfect for heating any in-ground swimming pool
  • Panel array measures 4 feet wide x 20 feet long

20. Raypak 206,000 BTU Natural Gas Millivolt Pool Heater -Patio, Lawn & Garden

By Raypak

  • High-wind resistance
  • Corrosion-resistant headers
  • Model Number: P-R206A-MN-C
  • PVC plumbing directly to the heater
  • Part Number: 009192

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21. Pentair SuperFlo VS Variable Speed Pool Pump, 342001 -Patio, Lawn & Garden

By Pentair

  • For most installations, it is recommended installing a valve on both the pump suction and return lines so that the pump can be isolated during routine maintenance
  • Your purchase includes One Pentair SuperFlo VS Variable Speed Pool Pump
  • Variable speed technology costs significantly less to operate
  • Savings based on variable speed pump compared to a single-speed pump running 12 hours per day at an average of $0.16 per kWh in a 20, 000 gallon
  • Variable speed pump with 115-230V and 50/60 Hz single phase capability
  • Ideal for standard pools requiring up to 1.5 HP pump
  • See exact dimensions in product pictures

22. Amazon Basics Outdoor Patio Heater with Wheels, Propane 46,000 BTU, Commercial & Residential – Havana Bronze -Patio, Lawn & Garden

By Amazon Basics

  • Outdoor gas heater with 46,000 BTUs, providing heat up to a 9-foot radius
  • Ideal for commercial cafes and restaurants or residential patios
  • Piezo ignition system for easy push-button start ups; requires 20lb Liquid Propane Gas tank (not included); chain to help secure LPG tank provided.
  • Measures approximately 18 by 89 inches (LxH); weighs 38 pounds
  • Backed by an Amazon Basics 1-year limited warranty
  • Safety auto shut-off tilt valve; waterbox for adding weight to the base; wheel assembly included for easy mobility
  • Secure the patio heater when not in use to avoid any potential damage to the patio heater
  • Made with aluminum, sturdy plastic, and rugged steel with a durable powder-coated finish that stands up to outdoor elements

24. Goplus Solar Dome Swimming Pool Heater Above Ground, Pool Solar Heater, Sun Heater -Patio, Lawn & Garden

By Goplus

  • ️ A protective cover is included to protect the dome when not in use
  • ️ Space saving and aesthetically pleasing when compared to solar panels
  • ️ Extend your swimming season with warm water and heat your pool to a warm, comfortable temperature
  • ️ Heat your pool in the environmentally friendly way, No electricity or gas connections
  • ️ Solar powered swimming pool heater, Connects to 1.5 inch hoses

25. Beluga Pool Solutions 1652 Solar Heating Device for Swimming Pool, Blue -Patio, Lawn & Garden

By Beluga Pool Solutions

  • Designed to work with in-ground or permanent above ground pools
  • Can be used with soft sided temporary pools with adapter (sold separately)
  • Heat your pool with a garden hose
  • Save hundreds on your energy bill
  • Easily connects to a standard 1 1/2″ return fitting
  • Increase the comfort and extend the swimming season of your pool.Economical alternative to gas or electric heating

26. FlowXtreme NS1002 Flat-Panel Pool Solar Heater, Black -Patio, Lawn & Garden

By FlowXtreme

  • This new design increases heating capacity by 40% per cycle.
  • Easy to install – standard, 1.25 – 1.5-in fittings provide compatibility with most above ground pools
  • Solar rays are magnified within the streamlined housing, heating up your pool water.
  • 1 Year Warranty – your product comes with a one Year manufacturer Warranty
  • State-of-the-art – an innovative, flat-panel structure lowers the amount of time it takes to heat your pool
  • Dimensions: 41.4-in L x 28.8-In w x 20.5-in H
  • Ignition Type-No Ignition System
  • Your item will arrive damage free with all necessary parts and accessories.
  • POWERED BY SUNLIGHT – The FlowXtreme Solar Dome Heater uses nature’s most powerful source of warmth
  • Simply attach to your filter & pump system and let the warm water flow!

27. Pentair 77707-0253 Combustion Air Blower Replacement Kit Pool and Spa Natural Gas Heater -Patio, Lawn & Garden

By Pentair

  • Includes single volt blower adapter
  • Combustion air blower replacement kit
  • Also fits Pentair Sta-Rite Max-E-Therm pool and spa natural gas heater model 400NA
  • Fits Pentair MasterTemp pool and spa natural gas heater model 400NA
  • Measures 12-inch length by 12-inch width by 12-inch height

28. Hayward FDXLBRN1930 FD Burner Replacement Kit for Hayward Universal H-Series Low Nox Pool Heater -Patio, Lawn & Garden

By Hayward

  • Fd burner kit
  • Weight 8.6 pounds
  • Also fits hayward universal h-series low nox pool heater models h300fdn, h300fdp, h350fdn, h350fdp, h400fdn, h400fdp
  • Fits hayward universal h-series low nox pool heater models h150fdn, h150fdp, h200fdn, h200fdp, h250fdn, h250fdp

29. American Standard 9075120 Safe-T Heater, 7.50 x 4.81 x 3.56 Inches, Black -Tools & Home Improvement

By American Standard

  • Designed for use with American Standard whirlpool bathtubs
  • 1500 watt and includes overheat protection
  • Quick connect Safe-T Heater connection system – whirlpool only
  • Helps maintain a consistent water temperature
  • Easy to install

30. GAME 4721-BB SolarPRO Curve Solar Pool Heater, Made for Intex & Bestway Above-Ground and Inground Pools, Includes Intex Adapters, 2 Hoses & Clamps -Patio, Lawn & Garden

By GAME

  • THE PERFECT GRADUAL HEATER: This solar pool heater is not intended to be a miracle-cure heater
  • It’s designed to extend your pool season by gradually increasing the water temperature by a few degrees
  • SOLAR POOL HEATER: The GAME SolarPRO Curve Solar Pool Heater has been designed for above-ground and most inground pools
  • It increases the pool temperature by 5 degrees in 4 days (for an 8,000-gallon pool).
  • ADJUSTABLE LEGS: This solar heater is compatible with Intex, Bestways, and most above and inground pools
  • DURABLE CONSTRUCTION: We’ve designed this above-ground solar pool heater with high-quality materials that will hold up against frequent exposure to the sun and outdoor elements.
  • UNIQUE CURVED SHAPE: The GAME solar pool heater has been engineered with a unique curved shape that maximizes heat collection
  • The adjustable and foldable legs allow the heater to be set for maximum exposure to the sun, along with a clear cover that locks in heat.
  • The treaded ports have been added for versatile plumbing options.
  • Maximum heat output with space saving footprint

31. Hayward GL-235 AquaSolar Pool Solar Temperature Controller -Patio, Lawn & Garden

By Hayward

  • LED indicators show status of system operations
  • Automatic switching (selectable) from solar pool heating to nocturnal pool cooling
  • Automatically maximizes solar heat collection
  • Precise, easy-to-read, calibrated temperature setting
  • Electronics in UV-protected locking weatherproof enclosure

32. Raypak 105,000 BTU Swimming Pool and Spa Heater – Propane -Patio, Lawn & Garden

By Raypak

  • Standard 120v 3-prong power cord or can be easily converted to 220v
  • Simple analog thermostat dial for accurate pool and spa temperature setting
  • Gas connection is 1/2″ NPT and measures 4 5/8″ off the ground level
  • Designed for easy installation on above ground pools, smaller in-ground pools, and spas
  • Unit measures 27.5″ H x 12″ wide X 24″ Deep

33. Pentair 011028 IntelliFlo VS Pool Pump, Almond -Patio, Lawn & Garden

By Pentair

  • 8-Programmable speed settings and built in timer
  • Intuitive, easy to use menu structure for programming and monitoring
  • Interfaces perfectly with Pentair automation systems that give you the convenience of Mobile device control
  • Totally enclosed fan cooled design for quiet operation and long life, top-mounted field wiring compartment makes access and installation easier
  • Control keypad can be rotated for convenient orientation on the pump or wall mounted with relocation kit

34. Hayward FDXLCNK0001 NA to LP Conversion Replacement Kit for Hayward Universal H-Series Low Nox Pool Heater -Patio, Lawn & Garden

By Hayward

  • Also fits hayward universal h-series low nox pool heater models h300fdn, h300fdp, h350fdn, h350fdp, h400fdn, h400fdp
  • Na to lp conversion kit
  • Weight 24.4 pounds
  • Fits hayward universal h-series low nox pool heater models h150fdn, h150fdp, h200fdn, h200fdp, h250fdn, h250fdp

35. Stiebel Eltron Tankless Water Heater – Tempra 15 Trend – Electric, On Demand Hot Water, Eco, White -Tools & Home Improvement

By Stiebel Eltron

  • Eco friendly unit saves energy with auto-modulation
  • Check our guides below to compare features of our various Trend and Plus models, each available in different kW levels
  • Digital temperature display is easy to read, while the interior solid copper heating system does all the power work
  • CONTINOUS FLOW – Hot showers will never be interrupted again
  • Our 7-Year Leakage and 3-Year Parts Warranties are included with purchase
  • Enjoy continuous, on-demand hot water with an unlimited supply, when you want it without wasting any energy when not needed
  • TEMPRA 15 TREND – This specific model is 14.4kW, 240V, requires a min recommended electric service of 100 A, and offers an output water temperature of 68° to 140°F
  • WARRANTIES INCLUDED – Stiebel Eltron’s top-rated electric tankless water heaters perform with the highest standards for comfort and reliability
  • SILENT OPERATION – One electronic switch will activate the hot water heater and it’s noise free while in use
  • SPACE & ENERGY SAVER – Its small, sleek white design saves space yet still provides endless hot water for your whole house, and no venting is required

36. ShineUs Bezel and Keypad Assembly Replacement Compatible with Hayward IDXL2BKP1930 Fit for Select H-Series Heater & H250IDL1,H300IDPL1,H400IDPL2. -Patio, Lawn & Garden

By ShineUs

  • Fit For Hayward H Series Low Nox Induced Draft Heaters from 2005 to present
  • Fits the following models only: H250IDL1, H250IDL2, H250IDPL1, H250IDPL2 H300IDL1, H300IDL2, H300IDPL1, H300IDPL2 H400IDL1, H400IDPL1, H400IDPL2
  • Bezel and keypad assembly replacement

37. Hydro Quip Hotspring Replacement Heater Assembly 1.0/4.OKW 120/240 Volt -Patio, Lawn & Garden

By Hydro Quip

  • Hotspring, Limelight, Tiger River 4kw replacement heater
  • Includes the needed pressure switch jumper

38. Raypak Digital Low NOx Natural Gas 399000 BTU Pool Heater 9243 -Patio, Lawn & Garden

By Ray Pak

  • Monitors operational status as well as service diagnostics
  • Compatible with most major swimming pool control and remote systems on the market today
  • LCD digital display provides accurate temperature
  • PVC plumbing directly to the heater
  • Low NOx 399,000 BTU Natural Gas Pool Heater

39. R0456500 Replacement for Zodiac Temperature Sensor 12 Month Warranty -Patio, Lawn & Garden

By Wholesale Sensors

  • 12-month manufacturers warranty
  • Perfect replacement for R0456500
  • Made in USA
  • Original Sensor Manufacturer

40. Puri Tech Quiet Heat 112,000BTU Pool Heat Pump with Savings Optimizer -Patio, Lawn & Garden

By Puri Tech

  • Simple and easy to use control panels include lockout security and an automation friendly system.
  • QZ Quiet Technology for quiet operation.
  • Ideal for pools up to 28,000 gallons
  • Durable weatherproof cabinet made for long-lasting use.
  • Savings Optimizer saves up to $2,000 a year, extends the life of the pump, and reduces the noise of the system.

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41. Dormont Ultra-flow Gas Appliance Connector Kit (0145881) 41-4142KIT-24BX – 1 In. OD (3/4 In. ID) 3/4 In. MIP X 3/4 In. FIP X 24 In. Length Gray PVC Coated -Tools & Home Improvement

By Dormont

  • 100% Factory leak tested
  • Indoor or Outdoor Use
  • 290,900 BTU
  • BAA Compliant
  • Designed for: High BTU applications such as; Commercial hot water heaters, Outdoor back-up generators, Tankless water heaters, Commercial Furnace or Bolier
  • MIP (Tapped 1/2 In
  • FIP) – 90-4042- (1) – 3/4 In.ID Flare X 3/4 In
  • 304 Stainless Steel flexible tubing with plated steel end fittings
  • Included Adapters – 90-4041-(1) – 3/4 In.ID Flare X 3/4 In
  • CSA Approved

42. Poolmaster 59026 Heater Slim Line Above-Ground Solar Power Swimming Pool Water Heat, 43” Long x 27” Wide, Black -Patio, Lawn & Garden

By Poolmaster

  • Power Source Type: Solar Powered
  • Model Number: 59026
  • Country Of Origin: China
  • Item Package Dimension: 5.01″ L x 2.63″ W x 2.63″ H

43. Raypak Kit Header Baffle 006826F -Patio, Lawn & Garden

By Raypak

  • Catalog Part Number: 6234-132
  • Raypak Inc
  • Part Number: 006826F

44. Puri Tech Quiet Heat 127,000BTU Pool Heat Pump with Optimizer -Patio, Lawn & Garden

By Puri Tech

  • Ideal for pools up to 35,000 gallons
  • Durable weatherproof cabinet made for long-lasting use
  • Simple and easy to use control panels include lockout security and an automation friendly system.
  • Savings Optimizer saves up to $2,000 a year, extends the life of the pump, and reduces the noise of the system.
  • QZ Quiet Technology for quiet operation

45. Zodiac R0455600 Blower Assembly with Gasket Replacement for Zodiac Jandy LXi Low NOx Pool and Spa Heaters -Patio, Lawn & Garden

By Zodiac

  • Include gaskets
  • Blower assembly replacement
  • Fits Zodiac Jandy LXi Low NOx pool and spa heater models 250, 300, 400

46. Hayward DF010 Commercial pH and ORP Sensors Digital Flow Meter -Pool Heat Pumps

By Hayward

  • Made in United States
  • Package width :17.018 cm
  • Package length :22.098 cm
  • Package height :9.398 cm

47. Hayward W3HP21104T HeatPro 110,000 BTU Pool Heat Pump for In-Ground Pools -Patio, Lawn & Garden

By Hayward

  • ECONOMICAL HEATING: Using the surrounding air to heat the pool, HeatPro is more economical than propane, natural gas and electric heaters for maintaining the ideal water temperature.
  • CORROSION RESISTANT: Titanium heat exchanger ensures maximum heat transfer and provides excellent salt water and chemical corrosion resistance
  • BEST FOR: In-ground pools that are used regularly and benefit from maintaining an ideal consistent temperature
  • Non-corrosive design makes it durable for coastal climates.
  • TRUSTED BRAND: With over 80 years of experience, Hayward is an industry leader in manufacturing advanced pool equipment.
  • UNPARALLELED DURABILITY: Ultra Gold corrosion-resistant technology provides unparalleled durability, even in harsh coastal environments.
  • UV-resistant body panels are impervious to corrosion and deterioration

48. Enersol 1′ x 8′ Solar Pool Heater w/Hardware -Patio, Lawn & Garden

By Enersol

  • NOTE: Installation kit required for every panel purchased after the 1st one.

Best Brands

Buying a product from a reputable manufacturer that provides high brand value is one of the most essential things. Based on my research, here are the top brands that make the best 400k btu pool heaters.

  • Hayward
  • Raypak
  • Pentair
  • Ecosmart US
  • SunHeater
  • Intex
  • VINGLI
  • SmartPool
  • Amazon Basics
  • Goplus

The Buyer’s Guide

Although the aim of this list is to help you choose the best option for your needs. This guide shall help you make an informed purchase decision. Here are the few things to consider when choosing a 400k btu pool heaters.

1. Features

There’s no point in purchasing a 400k btu pool heaters that doesn’t solve your usage needs. Sometimes, even the best option wouldn’t have all the options you’d need. That’s why list down all your feature requirements and make sure that the option you’ve chosen comes with all of them.

2. Budget

Budget plays an important role, if it wasn’t for the budget, wouldn’t everyone purchase the most expensive option? However, before you decide the budget, I’d recommend you to make a list of features you’d need. In case a feature you need the most isn’t available in your budget range, then there’s no point in buying it, is there?

My advice is to make sure that the product has all the features you need then decide the budget. If a product you’ve chosen isn’t having all the features you need, then you should consider increasing your budget.

3. Value For Money

There are times when you shall come across various 400k btu pool heaters that shall have all the features you need. However, the price difference shall exist. In a situation like this, it is recommended to value each feature and make sure that you’re not overpaying for a feature you wouldn’t use.

4. Brand, Customer Support, & Warranty

Purchasing a product from a reputed brand is very important. Not only does it guarantee high-quality build, but you also get much better customer support.

You should also make sure that it has a decent warranty, it is really helpful in case a product breaks down due to manufacturing defects. Also, repairs during warranty are generally free of cost (depends on service terms).

5. Individual Product Reviews

You don’t have to watch individual reviews of each 400k btu pool heaters in this list. However, pick 2-3 options that have all the technical aspects according to your usage needs. Once you’re ready with it, go to YouTube/Amazon and look at video/customer reviews to make sure that the existing buyers are satisfied with the product.

The FAQs

Which is the best 400k btu pool heaters?

According to my research, the Pentair 460735 MasterTemp 300K BTU Propane Gas High Performance Eco-Friendly Heater is the best option.

Is Pentair a reliable brand?

It’s one of the best brands, not only does it make the top-rated 400k btu pool heaters, but it also is known for its exceptional service.

Which is the cheapest yet powerful 400k btu pool heaters?

According to me, the Raypak 406,000 Btu Digital Natural Gas Pool Heater with Cupro Nickel Ray-014941 is one of the cheapest options available and yet has all the features.

Are there deals going on?

A few of the options in our article are currently available for a discounted price. However, check out the product listing to find more information.

What brands should I consider when purchasing?

Based on my research, these are the top 5 brands: Pentair, Hayward, Puri Tech, Hayward, and Puri Tech.

Should I buy it online or go to an offline store?

Shopping online comes with a few advantages such as discounted pricing, quick delivery at home. However, if you’re in a hurry or can find the product for a cheaper price in the offline market, consider visiting the offline store.

The Verdict

Choosing the right product isn’t easy and for many of them it could be a time consuming task. However, with this guide, my aim is to help you guys find the perfect 400k btu pool heaters for your needs.

I’ve done a huge research to ensure that options I’ve listed are among the best. Like mentioned above, I also interviewed many experts to make sure that the enlisted models are high quality.

I hope that you’re able to find the right 400k btu pool heaters for your usage. If you are still struggling to find one, feel free to comment below or contact me.