Raypak Avia 400K BTU Propane Pool Heater - NiTek Heat Exchanger - P-R404A-EP-N | 18039

Wi-Fi Remote Controlled

Ni-Tek™ Heat Exchanger

Fully Serviceable

Price

$4,200.00

The Raypak AVIA 400 is a complete reimagining of pool heating technology, designed to provide massive thermal power in a compact, tech-forward package. Delivering a 399,000 BTU output, this liquid propane unit is engineered for rapid heat-up times for the largest residential pools and oversized spa combinations in areas where natural gas is unavailable.

The 018039 model features a reliable standard copper heat exchanger, providing consistent, everyday performance. Combined with integrated Wi-Fi and the ability to control your entire equipment pad from a smartphone, the AVIA is the ultimate premium heating solution for rural estates and off-grid properties.

Features

Integrated Smart Automation: The AVIA features built-in Wi-Fi and the Raymote Mobile App. Not only can you control your pool temperature from anywhere in the world, but the AVIA can also manage your pool pump and lights, acting as a sophisticated automation hub for your backyard.

Maximum Propane Heating Power: With a 399,000 BTU rating, this is the highest-capacity model in the AVIA series. It is designed for near-instant heat on demand, making it the perfect choice for heating large attached spas in minutes, even in cold climates.

Standard Copper Heat Exchanger: Built with high-quality integral copper fin tubes, this heat exchanger provides maximum heat transfer and 84% thermal efficiency, ensuring lower operating costs over the lifespan of the heater.

ProTek Shield Module: Features a specialized, replaceable module that protects the heat exchanger from the damaging effects of galvanic corrosion (electrolysis), providing an essential layer of defense for your equipment.

Compact and Lightweight Design: Despite its massive power, the AVIA weighs under 140 lbs and features a small, square footprint. It is roughly half the weight of traditional 400K BTU heaters, making it easy to install on tight equipment pads.

Intelligent Flow Monitoring: The AVIA is the only heater in its class with a built-in Protection Mode that monitors water flow. If it detects a flow issue that could lead to overheating, it will alert you via the app to prevent damage before it occurs.

High-Resolution Touchscreen: Features a large, intuitive digital interface that is easy to use even with wet fingers. The swing-out control box provides simple service access to all internal components, reducing maintenance time.

Specs


Heat Output	399,000 BTU
Fuel Type	Liquid Propane (LP)
Heat Exchanger	Copper (Standard Durability)
Header Material	Glass-Reinforced Polymer
Ignition Type	Direct Spark Ignition
Connectivity	Integrated Wi-Fi / Raymote App
Efficiency Rating	84%
Model Number	P-R404A-EP-C / 018039

Notes

Professional Setup Required: Due to its high BTU rating, this propane heater requires specific gas line sizing and a high-capacity propane tank with the correct regulator configuration. It must be installed by a licensed HVAC or pool professional to ensure safety, proper operation, and to validate the manufacturer's warranty.

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.