Shop
  • Deals
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.
TermsPrivacy
BrowseBrowse deal.ai
Deal.ai › Raypak
Raypak
Raypak 406A 399,000 BTU Natural Gas Pool Heater

Raypak 406A 399,000 BTU Natural Gas Pool Heater

Best price now

$4,426.00at The Home DepotObserved at 2:37 PM

Compared across 3 stores. Prices are checked against each store and labelled with when.

Visit The Home Depot

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

Our take on the Raypak 406A 399,000 BTU Natural Gas Pool Heater

The Raypak 406A is a 399,000 BTU natural gas pool and spa heater with a digital control board and 82% thermal efficiency. It is a Category I vent unit that needs a natural draft flue, so it suits outdoor or well-vented installations rather than tight indoor spaces. At $4,426 at The Home Depot as of November 7, 2026, it is the best new price among the four stores that list it.

Best forLarge in-ground pools up to about 1,800 gallons per hour of heat demandOwners replacing an existing natural gas heater with a 2-inch plumbing setupOutdoor equipment pads with room for a 9-inch draft hoodPool and spa combos that need fast heat-up
Pros
  • 399,000 BTU input heats large pools quickly
  • 82% thermal efficiency is solid for a natural draft gas heater
  • Digital display and control board simplify temperature setting
  • Polymer headers resist corrosion better than older brass units
  • Widely supported by pool technicians, with parts easy to find
Cons
  • Category I venting limits placement and needs a proper draft hood
  • Natural gas only; no propane or electric option on this model
  • Needs a 3/4-inch gas line and adequate supply pressure
  • Large footprint at 28 x 29 x 38 inches
  • Installation and gas work add significant cost beyond the unit

Raypak 406A 399,000 BTU Natural Gas Pool Heater prices at every store

  • Lowe'sNew

    In stock

    $4,426.00Free shippingObserved at 2:36 PM
    Visit Lowe's
  • The Home DepotNew

    Availability unknown

    $4,426.00Free shippingObserved at 2:37 PM
    Visit The Home Depot
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $4,426.00Free shippingObserved at 2:36 PM
    Visit Amazon

Also available at

  • eBayCheck price at eBay

Store links may earn us a commission. Some prices via Klarna.

Raypak 406A 399,000 BTU Natural Gas Pool Heater price history

Lowest price we've seen: $4,426.00 on Nov 7 at The Home Depot. Tracked across 3 stores since Nov 7.

What reviewers say

Owners of the Raypak 406A series generally report reliable heating and quick temperature recovery for large pools. Complaints center on installation requirements and the occasional control board or sensor failure.

What people mention
  • Heating speedPraisedOwners say it brings a large pool up to temperature quickly.
  • ReliabilityMixedMany units run for years, but some owners report control board or sensor failures.
  • InstallationCriticisedBuyers say proper gas line sizing and Category I venting make install costly and fussy.
  • BuildPraisedThe cabinet and polymer headers are described as holding up well outdoors.
  • ControlsPraisedThe digital display is called simple to set and read.

About the Raypak 406A 399,000 BTU Natural Gas Pool Heater

This state-of-the-art Raypak Digital Gas Pool and Spa Heater features breakthrough technology designed specifically with pool and spa owners in mind. Built for endurance and efficiency, this heater will keep your pool or spa at the perfect temperature year-round. Please download and read product brochure and Instructions/Assembly before your heater is delivered.

Specifications

Input Rate
399 MBTU/hSource
Thermal Efficiency
82%Source
Energy Type
GasSource
Venting
Category ISource

Questions and answers

Is the Raypak 406A worth it?
For a large pool with natural gas available, yes. It heats fast and costs less than many comparable 400,000 BTU heaters. Factor in installation and gas line work.
What size pool will 399,000 BTU heat?
Roughly 1,500 to 2,000 square feet of pool surface in a moderate climate. Larger or windy pools will heat more slowly.
Does it work with propane?
No. This model is natural gas only. Raypak sells separate propane models, and converting requires an approved kit and orifices.
What venting does it need?
Category I venting with a 9-inch flue and a natural draft hood. It is meant for outdoor or properly vented indoor installations.
What is in the box?
The heater itself with the digital control board. Gas piping, venting, and the 2-inch water connections are supplied at installation.
When is it cheapest?
Pool heater prices tend to dip in late fall and winter, outside swim season. The best new price was $4,426 at The Home Depot as of November 7, 2026.
Where is the Raypak 406A 399,000 BTU Natural Gas Pool Heater cheapest?
At The Home Depot, for $4,426.00, as of our latest check.
Where can I buy the Raypak 406A 399,000 BTU Natural Gas Pool Heater?
4 stores we checked sell it, including The Home Depot, Lowe's, Amazon, eBay.

Shoppers also compared

  • F
    FibroPool FH255 Swimming Pool Heat Pump 55,000 BTU
    FibroPool FH255 Swimming Pool Heat Pump 55,000 BTU
  • P
    Pentair MasterTemp Pool Heater 461061
    Pentair MasterTemp Pool Heater 461061
  • P
    Pentair 460958 UltraTemp 140 H/C Pool & Spa Heat Pump
    Pentair 460958 UltraTemp 140 H/C Pool & Spa Heat Pump
  • H
    Hayward W3HP21404T HeatPro 140,000 BTU Pool Heat Pump
    Hayward W3HP21404T HeatPro 140,000 BTU Pool Heat Pump
  • J
    Jandy JXi 400,000 BTU Natural Gas Pool Heater
    Jandy JXi 400,000 BTU Natural Gas Pool Heater
  • H
    Hayward H-Series 250K BTU
    Hayward H-Series 250K BTU
  • F
    FICISOG Above Ground Inverter Pool Heater Electric
    FICISOG Above Ground Inverter Pool Heater Electric
  • R
    Raypak 266,000 BTU Digital Electronic Ignition
    Raypak 266,000 BTU Digital Electronic Ignition

Compare the Raypak 406A 399,000 BTU Natural Gas Pool Heater

  • Raypak 406A 399,000 BTU Natural Gas Pool Heater vs FibroPool FH255 Swimming Pool Heat Pump 55,000 BTU
  • Raypak 406A 399,000 BTU Natural Gas Pool Heater vs Pentair MasterTemp Pool Heater 461061

Stores we've priced the Raypak 406A 399,000 BTU Natural Gas Pool Heater at

  • Home Depot deals and prices
  • Lowe's deals and prices

More from Raypak

  • R
    Raypak Digital Natural Gas Pool Heater 009216
    Raypak Digital Natural Gas Pool Heater 009216
  • R
    Raypak Avia Pool Heater
    Raypak Avia Pool Heater
All Raypak deals and products →
Voltage
120/240VACSource
Phase
1-PhaseSource
Max Water Flow
100 GPMSource
Water Connection
2 inchSource
Gas Connection
0.75 inchSource
Dimensions
28 x 29 x 38 inchesSource
Flue Diameter
9 inchSource
BTU Input
399000Source