Best 4000 Btu Pool Heater 2021 - 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 best4000 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 EcoSmart SMART POOL 27 Electric Tankless Pool Heater, 27kW, 240 Volt, 112.5 Amps with Self Modulating Technology. 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. 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.

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. 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

4. Raypak 014784 PR156AENC 150000 BTU Natural Gas Heater

  • Part Number: 014784
  • Model Number: P-R156A-EN-C
  • Perfect choice for above-ground pools and spas
  • Extend your swim season, open your pool earlier and close it later
  • Extend your swim season, open your pool earlier and close it later

5. Hayward W3H400FDP Universal H-Series 400,000 BTU Pool and Spa Heater, Propane

  • 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.

6. FibroPool FH055 In Ground Swimming Pool Heater

  • 100% Titanium heat exchanger
  • Quick disconnect piping, 1 1/2" pvc and 17 Amps power-220 volts
  • Digital display and controller
  • 16" x 40" footprint, slim fit
  • US Department of Energy top Energy Efficient System, 25 cents per hour

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

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

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. EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology

  • The product is highly durable
  • The product is easy to use
  • Manufactured in China
  • Amperage (amps): 75. Activation flow: 0. 3 GPM. Flow Rate @ 35 F Rise (gallons/min): 3. 51 gal (US)/min
  • The product works and is compatible with 2 X 40 AMP (DP) breakers and 2 X 8 AWG wire

10. Sun Joe SPX3000 2030 Max PSI 1.76 GPM 14.5-Amp Electric High Pressure Washer, Cleans Cars/Fences/Patios

  • Questions, Text 563563 to chat directly with a Sun Joe expert
  • POWERFUL: 14.5-Amp/1800-watt motor generates up to 2030 PSI (at initial discharge per CSA internal pressure testing) and 1.76 GPM (with nozzle open at minimum pressure) of water flow
  • VERSATILE: Tackle a variety of cleaning tasks: homes, buildings, RV’s, cars, trucks, boats, decks, driveways, patios, lawn equipment, and more. With two 0.9 L onboard detergent tanks, removable tanks carry and store different types of detergent to simultaneously tackle different cleaning projects.
  • TSS (Total Stop System): Automatically shuts off pump when trigger is not engaged to save energy and prolong pump life.
  • Max PSI at initial discharge per CSA internal pressure testing. Max GPM with nozzle open at minimum pressure.

Last update on 2021-12-03 / Affiliate links / Images from Amazon Product Advertising API

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