Best 4000 Btu Pool Heater 2023 - Top 10 Picks

This is the ultimate buyer's guide to finding the right 4000 btu pool heater to suit your needs. We review the 10 best 4000 btu pool heater on the market so you know that your next decision will be a smart one!

When you're trying to select the good 4000 btu pool heater, there are a lot of factors to consider. This page has everything you need to know in one place.

This guide will help you avoid the pitfalls that come with researching 4000 btu pool heater.

You don't have to try out every 4000 btu pool heater to find one that meets your needs. After extensive research and hours of in-person tests, we've found the best 4000 btu pool heater to be Raypak 014951 Digital Cupro-Nickel Propane 240,000 BTU Pool Heater. There are a lot of sub-par products out there, but this product is one of the highest quality you'll find. Next best option is Hayward W3H400FDN Universal H-Series 400,000 BTU Natural Gas Pool and Spa Heater for In-Ground Pools and Spas.

Choosing the 4000 btu pool heater can be a daunting task, especially if you're doing it for the first time. Here's what we recommend based on our extensive research. We've compiled a list of the highest rated 4000 btu pool heater. The following products are some of the best you can get right now.

List of Top 10 4000 Btu Pool Heater

Review of Best 4000 Btu Pool Heater

1. Raypak 014951 Digital Cupro-Nickel Propane 240,000 BTU Pool Heater

  • Cupro-nickel gas pool and spa heater
  • Pagoda design ensures heater stays active in harsh weather conditions
  • Microprocessor controlled thermostat
  • Digital display
  • On-board self diagnostics

2. Hayward W3H400FDN Universal H-Series 400,000 BTU Natural Gas Pool and Spa Heater for In-Ground Pools and Spas

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

3. VEVOR Electric Pool Heater 11KW 240V Swimming Pool Electric Heater Water Bath Heater Electric Digital fit for Thermostat, fit for Max 1981 Gallon Pool Equipment,Note:You Must Wire This Item Yourself

  • Superior Heater: Power: 11KW, Input Voltage: AC 240V 50/60HZ; Current: 50A; Product Size(L × W × H): 18.7 × 3.9 × 14 inch (475 × 100 × 355 mm). This swimming pool thermostat adopts advanced aluminum-plating zinc plates, effectively avoiding the hurt of exposure to the sun. The liner tank uses 304 stainless steel to feature durable and sturdy performance.
  • Adjustable Temperature: It is convenient for you to observe the change of temperature on the LCD at any time, and you can adjust the setting value easily through the touching screen. The electric SPA heater will automatically control the temperature ranged from 71.6 °F-122 °F (22 °C-50 °C). With the smart temperature sensor, the heating system is always under control and keeps non-fluctuation of the temperature.
  • Intelligent Self-test: The intelligent self-checking function not only can detect automatically to reach the set temperature, but also supervises the operational status of the heater in case of water absence. If the heater has the risk of high temperature, the heating system will stop working. This humanized design helps to keep you secure when you use the machine.
  • Ease To Assemble: The pool thermostat is not complicated to install. We provide you a detailed installation manual and 2 of 1.96inch (50mm) interfaces. Please distinguish the inlet pipe and the outlet pipe during your installation. It is recommended that you connect the water heater with a pump of at least 1.5HP (1.1KW) power.The diameter of the water pipe you use should be 1.5in(38mm) for a smooth flowing.
  • Wide Application: This high-quality electric pool water heater is commonly used indoors and outdoors, especially for swimming pools, SPA pools, and bathtubs. The digital heating system maintains a constant and comfortable temperature. For a better heating effect, you are suggested to use this water heater for a maximum of 1981 Gallon (7.5 CBM) pool equipment. Please do not use the heater in saltwater, acidic water, or alkaline water. Note: Cable wire without plug.

4. EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

  • Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature
  • Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x 3.75 inches
  • Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.
  • EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution

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

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

7. CMQ 30000 Btu/Hr Upgrade Portable SPA Water Bath Heater Thermostat Electric Pool Water Heater for Above Ground Inground Pool Hot Tub, Swimming Pool Thermostat Heater Pump

  • 316# stainless steel, Best in its class
  • 2.37000 Btu/Hr heating capacity,11KW
  • 3.Suitable for pools up to 5000 gallons in coastal climates
  • 4.Suitable for ALL Hot Tubs,Above Ground Inground Pool Swimming Pool.
  • 5.240 Volts 50A - 60 HZ American Voltage.Use With Water Pump.

8. 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

  • GREAT FOR SMALLER POOLS: Natural gas heater boasts 125,000 BTUs, designed for smaller bodies of water up to 15,000 gallons
  • 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
  • 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
  • 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
  • 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

9. Pentair EC462025 MasterTemp 125 125,000 BTU Compact Energy Efficient Swimming Pool and Spa Propane Gas Heater for Small Pools Up to 15,000 Gallons

  • GREAT FOR SMALLER POOLS: Propane heater boasts 125,000 BTUs, designed for smaller bodies of water up to 15,000 gallons
  • 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
  • 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
  • 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
  • SPECIFICATIONS: Voltage: 120/240V; Intake/discharge plumbing: 1.5-inch; Dimensions (L x W x H): 31.5 x 21 x 23 inches; Weight: 80 pounds

10. Hayward W3H400FDP Universal H-Series 400,000 BTU Propane Pool and Spa Heater for In-Ground Pools and Spas

  • BEST FOR: In-ground pools and spas with a surface area up to 1,200 ft. where natural gas is available. 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.
  • CORROSION PROTECTION: The Universal H-Series boasts exceptional protection against corrosion and premature failure caused by unbalanced water chemistry.
  • ENERGY SAVINGS: The efficient, industry-leading design reduces circulation pump run time to provide energy savings.
  • EASY-TO-USE: Intuitive front control panel provides easy operation, service and maintenance.

Last update on 2023-03-22 / Affiliate links / Images from Amazon Product Advertising API

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