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RAYPAK AVIA 404A 018051 LOW NOX PROPANE POOL & SPA HEATER – 399K BTU, POLYMER HEADERS, NITEK HEAT EXCHANGER
Model Number: P-R404A-EP-N
Heating Capacity: 399,000 BTU
Fuel Type: Propane (LP)
Heat Exchanger: NiTek (Titanium-Fortified) Fin Tube
Header Material: Glass-Reinforced Polymer
Ignition Type: Digital Direct Spark Ignition (Wi-Fi Enabled)
Elevation Rating: 0–4,500 Feet
The Raypak 018051 AVIA HD P-R404A-EP-N Propane Pool & Spa Heater upgrades Raypak's AVIA platform with a NiTek heat exchanger for extra protection in demanding water chemistry environments, delivering a 399,000 BTU input for large pools that need fast recovery. Built-in Wi-Fi and onboard digital controls give owners full remote access via the Raymote app, and the unit is rated for elevations up to 4,500 feet. The NiTek exchanger is designed to hold up to saltwater systems and challenging water balance better than standard copper construction.
Even with its high 399,000 BTU output, the AVIA HD installs on a standard 2' x 2' equipment pad and can be rotated on three sides for flexible pad placement. The straight-tube heat exchanger design keeps the unit highly serviceable, and the included ProTek Shield replaceable module adds another layer of protection against galvanic corrosion over the life of the heater.
Digital direct spark ignition eliminates the standing pilot, cutting standby propane use and improving safety. The heater is SCAQMD Low NOx certified, California Title 24 compliant, and design-certified to ANSI Z21.56 / CSA 4.7, the current national standard for gas-fired pool and spa heaters.
Key Features
- 399,000 BTU with upgraded NiTek heat exchanger
- Enhanced protection for saltwater and difficult water chemistry
- Built-in Wi-Fi with Raymote app control — no separate control panel required
- ProTek Shield replaceable corrosion-protection module
- Digital direct spark ignition, no standing pilot
- Installs on a standard 2' x 2' equipment pad
- Rotatable water and gas connections on three sides
- Stainless steel combustion chamber
- 84% thermal efficiency rating
- SCAQMD Low NOx certified
- California Title 24 compliant
- Smart scheduling and remote diagnostics via mobile app
- Compatible with most pool automation systems
Specifications
| Specification | Details |
|---|---|
| Brand | Raypak |
| Model | P-R404A-EP-N (AVIA HD) |
| Part Number / SKU | 018051 |
| Fuel Type | Propane (LP) |
| BTU Input | 399,000 BTU |
| Heat Exchanger | NiTek (Titanium-Fortified) Fin Tube |
| Header Material | Glass-Reinforced Polymer |
| Ignition | Digital Direct Spark, Wi-Fi Enabled |
| Controls | Integrated Digital Control with Raymote App |
| Certification | ANSI Z21.56 / CSA 4.7, SCAQMD Low NOx, Title 24 |
| Elevation Rating | 0–4,500 Feet |
| Voltage | 120/240 VAC, 1-Phase, 60Hz |
| Water Connections | 2" (Max Flow 100 GPM) |
| Warranty | 2 Years Parts & Labor |
What's Included
- Raypak AVIA HD P-R404A-EP-N pool & spa heater
- Built-in Wi-Fi module for Raymote app control
- ProTek Shield corrosion-protection module
- Owner's manual and installation guide
- Manufacturer's limited warranty registration
With a NiTek heat exchanger built for the toughest water conditions and Wi-Fi convenience baked in, the AVIA HD 404A is a trusted upgrade pick for saltwater pools and high-capacity residential replacements.
Learn more at https://www.raypak.com/products/pool-and-spa/residential-pool-and-spa-heaters/avia-with-nitek-pool-and-spa-heater/
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