Best 400000 Btu Heater 2023 - Top 10 Picks

This is the ultimate buyer's guide to finding the right 400000 btu heater to suit your needs. We review the 10 best 400000 btu heater on the market so you know that your next decision will be a smart one!

When you're trying to select the good 400000 btu 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 400000 btu heater.

You don't have to try out every 400000 btu heater to find one that meets your needs. After extensive research and hours of in-person tests, we've found the best 400000 btu heater to be Dyna Glo, KFA400DGD, 400,000 BTU Kerosene Forced Air Heater with Thermostat. 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 W3H400FDP Universal H-Series 400,000 BTU Pool and Spa Heater, Propane.

Choosing the 400000 btu 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 400000 btu heater. The following products are some of the best you can get right now.

List of Top 10 400000 Btu Heater

Review of Best 400000 Btu Heater

1. Dyna Glo, KFA400DGD, 400,000 BTU Kerosene Forced Air Heater with Thermostat

  • 400,000 BTU
  • Heats up to 8,500-sq ft
  • Comfort control thermostat
  • Built in digital display
  • Dual source power cord

2. 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.

3. 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.

4. Mr. Heater 250,000-400,000 BTU Forced Air Propane Heater with QBT, Regular, Multicolored

  • 250000 - 400000 BTU per hour
  • For use with propane gas.
  • Heats up to 10,000 square feet
  • Operates up to 17 hours on 2-100 lb. propane tanks - low setting.
  • Rugged; durable; steel construction; Heavy duty high output fan

5. Hayward FDXLHXA1250 Heat Exchanger Assembly Replacement for Hayward H250FD Universal H-Series Low Nox Pool Heater

  • Heat exchanger assembly
  • Fits hayward universal h-series low nox pool heater model h250fd
  • Weight 48.5 pounds. Low NOx Emissions - Meets Clean Air Quality Standards
  • 2 inch x 2 1/2 inch CPVC Union Plumbing Connections

6. 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

7. Raypak Digital Low NOx Natural Gas 399000 BTU Pool Heater 009243

  • Part Number: 009243
  • Model Number: P-R407AL-EN-C
  • LCD digital display provides accurate temperature
  • Monitors operational status as well as service diagnostics
  • High-wind resistance

8. Dr Infrared Heater DR-PS11524 Salamander, PS11524, Yellow

  • Clean, instant, odor-free heat
  • 240 volt, single Phase, 15000 watt
  • Heavy-duty steel Frame; safety guards on both INTAKE and output ends
  • Adjustable thermostat with temperature range from 40 - 100 degree; hardwiring required
  • Heater comes with cart for convenient portability

9. 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

10. 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

Last update on 2022-11-19 / Affiliate links / Images from Amazon Product Advertising API

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