Raypak P-R406A-EN-C Digital Electronic Ignition Natural Gas Heater 406,000 BTU | 009219

Raypak Digital 406K BTU Natural Gas Pool Heater - Copper - P-R406A-EN-C | 009219

ProTek Shield™ Technology

Microprocessor-Controlled Thermostat

Smart Pool & Remote Compatible

Price

$4,200.00

The Raypak P-R406A-EN-C is the most powerful model in the Raypak residential lineup, designed to provide lightning-fast heat-up times for even the largest inground pools and luxury spa combinations. With a massive 406,000 BTU output, this heater is the gold standard for homeowners who want their pool ready at a moment's notice, regardless of how large the body of water is or how cold the air gets.

The 009219 model combines commercial-grade heating capacity with a sophisticated digital control system, making it the premier choice for large-scale residential projects and high-end backyard retreats.

Features

Unrivaled Heating Speed: With 406,000 BTUs of raw heating power, this unit can raise pool temperatures significantly faster than smaller models, making it the ideal choice for "weekend warriors" or those with large, attached spas that need to be hot in minutes.

Microprocessor-Controlled Thermostat: The intuitive digital display allows you to set your pool and spa temperatures independently to within one degree. The system also features constant self-diagnostics to alert you to any operational issues, ensuring the heater is always running at peak performance.

Reliable Electronic Ignition: Features a robust "spark-to-pilot" ignition system that only lights when there is a call for heat. This eliminates the need for a standing pilot light, saving on gas costs and preventing the flame from blowing out in high-wind conditions.

Standard Copper Heat Exchanger: Built with high-quality integral copper fin tubes, this heat exchanger provides maximum heat transfer and efficiency. The single-piece header design ensures smooth water flow and minimizes the risk of internal leaks.

PolyFlo Integrated Bypass: Raypak’s patented bypass design balances the water flow through the heat exchanger automatically. This prevents condensation and scale buildup, protecting the heater's internal components from premature wear and maintaining 82% thermal efficiency.

ProTek Shield Technology: Includes a specialized, replaceable module designed to protect the heat exchanger from the damaging effects of galvanic corrosion (electrolysis), which is a leading cause of heater failure in modern chemically treated pools.

Non-Corrosive Cabinet Construction: The heater is housed in a polyester-coated, galvanized steel cabinet that is built to resist rust, UV fading, and harsh weather. Its wind-resistant design ensures the burner stays functional even in difficult outdoor environments.

Specs


Heat Output	406,000 BTU
Fuel Type	Natural Gas
Heat Exchanger	Copper (Standard Durability)
Ignition Type	Digital Electronic (Spark-to-Pilot)
Water Connection	2" CPVC Unions
Elevation Rating	0 – 2,000 Feet (High-Altitude models available)
Efficiency Rating	82%
Model Number	P-R406A-EN-C / 009219

Notes

Professional Setup Required: Due to its high BTU rating, this heater requires precise gas line sizing (typically 1.25" to 1.5" depending on the distance from the meter) and proper venting. It must be installed by a licensed HVAC or pool professional to ensure safety and to validate the manufacturer's warranty.

Raypak Digital Heater Highlights

Heat Exchanger

Our Digital Gas Pool and Spa Heater includes various application options based on fin tube materials including: copper and cupronickel, both available as ASME1.

Digital Controls

Equipped with an intelligent control system that can easily be tied into an existing remote system, our heater also features a microprocessor-controlled thermostat for setting the perfect temperature for your pool or spa.

Flexible Installation

Whether upgrading your existing system or adding a new pool or spa to your home, the Raypak Digital Gas Pool and Spa Heater offers you flexible installation solutions.

Bonus: The self-adjusting burner compensates for gas pressure fluctuations, ensuring that the heater will always burn clean and safe.

Manuals & Documents

Raypak Owner's Manual

Raypak Digital Heater Brochure

Raypak Digital Heater Reference Guide

Raypak Warranty Info

What will it cost to heat your pool?

Fuel and electricity prices vary a lot by region, so put in your own rate from your last bill and get a number that's actually yours.

1 · Your pool

Pool size

Water now 68°F

Temperature you want 84°F

You need to raise the water 16 degrees

2 · Your heater & rate

Heater type

Fuel Set at the factory — you buy the version matching the fuel you have.

Heater size Figured at 82% efficiency, the rating on Raypak Digital heaters.

Cost per therm Use the all-in rate from your gas bill, including delivery charges.

And what about month to month?

Warming the pool up is a one-off. Most of what you'll actually spend is holding that temperature — replacing the heat your pool loses to the air, day and night.

Average outdoor temperature 65°F

Day and night averaged together, for the month you're picturing.

With a solar cover

Per month

$0.00

—

Per month — no cover

$0.00

—

Keeping a solar cover on saves roughly $0.00 a month here — most of a heated pool's heat leaves by evaporation off an open surface, so a cover is the cheapest thing you can do to bring this figure down.

Warm-up figures are the physics with no heat loss. Your pool loses heat to evaporation, wind and cool air the whole time the heater runs, so those numbers are a floor, not a forecast. The real-world line adds a typical 25–50%.

Monthly figures are an estimate, and a rough one. They assume you hold your target around the clock for 30 days. Real heat loss swings a long way with wind, humidity and how much sun your pool gets — an exposed, windy yard can run well above these numbers and a sheltered sunny one below. Treat them as a ballpark for comparing options, not a quote.

Warm-up uses gallons × 8.34 × degrees of rise. Monthly uses an estimated heat loss across your pool's surface area against the temperature difference with the air, at 82% thermal efficiency for gas. Pool presets assume 4 ft of water in a 52" wall and 3.5 ft in a 48" wall. Estimates only. Not sure of your pool volume or which heater fits? Get in touch.