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Product Overview

The Raypak P-R404A-EP-C Low NOx AVIA Propane Gas Heater | 018039 is a high-performance digital propane pool and spa heater designed for fast, efficient residential pool heating. With 399,000 BTU / 399.0 MBTU/h heating performance, this heater is built for medium to large pools, spas, and pool/spa combination systems that need strong heat-up capability.

This AVIA model features propane gas operation, electronic ignition, polymer headers, a copper heat exchanger, built-in Wi-Fi, and Raymote app compatibility. The smart AVIA platform allows users to monitor and control heater operation from a compatible mobile device, receive service alerts, and manage temperature scheduling.

The compact design fits on a standard 2 ft x 2 ft equipment pad, while the Low NOx certified burner system and 84% efficiency rating make it a strong modern heater choice for propane pool heating applications. Raypak lists the AVIA 404A platform with 399 MBTU/h input, 84% thermal efficiency, 120/240VAC single-phase power, and 100 GPM maximum water flow.

Ideal For

• Residential inground pools
• Pool and spa combination systems
• Propane / LP gas pool heating systems
• Medium to large pool heating applications
• 399K / 400K BTU heater replacement applications
• Customers wanting built-in Wi-Fi control
• Raymote app-connected pool systems
• Low NOx heater installations
• Equipment pads with compact space requirements
• Outdoor residential pool equipment installations
• Professional pool heater installations

Key Features

• 399,000 BTU heating performance — provides fast heat-up capability for properly sized pools and spas.
• Propane gas operation — designed for compatible liquid propane / LP gas equipment pads.
• Low NOx certified — engineered for cleaner combustion and reduced emissions.
• Electronic ignition — starts the heater without a standing pilot light.
• Built-in Wi-Fi — allows smart connection, remote access, and real-time service alerts.
• Raymote app compatibility — lets users control pool temperature and heater settings from a compatible mobile device.
• Smart ecosystem manager — can support management of heater, pump, water feature, and scheduling functions when configured properly.
• Copper heat exchanger — provides efficient heat transfer for standard residential pool and spa applications.
• Polymer headers — corrosion-resistant header design for pool water environments.
• ProTek Shield protection — helps protect the heat exchanger from corrosion and extend heater life.
• 84% efficiency rating — supports efficient gas heater operation.
• Compact 2 ft x 2 ft pad footprint — fits many standard pool equipment pad layouts.
• 0–4,500 ft elevation reference — listed for standard propane AVIA installation applications where approved.

Benefits

The Raypak AVIA 018039 gives pool owners strong propane heating performance with modern smart control. Its 399K BTU output helps warm pool and spa water quickly, while the built-in Wi-Fi and Raymote app make it easy to monitor and control heating from a phone or compatible device.

The AVIA system can help automate pool temperature control, provide real-time service alerts, and simplify heater operation. Its compact cabinet makes it easier to place on many equipment pads, and the copper exchanger with polymer headers provides dependable performance in properly maintained pool water.

For pool professionals, the P-R404A-EP-C offers a modern Raypak heater platform with Low NOx performance, digital control, built-in connectivity, and a service-friendly residential heater design.

Specifications

Included Components

• 1 × Raypak P-R404A-EP-C AVIA propane gas pool and spa heater
• Integrated digital smart control system
• Built-in Wi-Fi connectivity hardware
• Electronic ignition system
• Copper heat exchanger
• Polymer header assembly
• ProTek Shield module
• Manufacturer-supplied installation documentation

Propane gas line, gas shutoff valve, regulator if required, electrical wiring, bonding materials, venting components, plumbing valves, unions, check valves, pressure relief valve if required by local code, equipment pad materials, automation wiring, and installation labor are sold separately unless specifically included by the supplier.

Compatibility Notes

The Raypak 018039 is designed for compatible propane gas pool and spa heating systems requiring a 399K / 400K BTU-class digital Low NOx heater.

Common application references include:

• Residential inground pools
• Pool and spa combination systems
• Propane / LP gas equipment pads
• 399K / 400K BTU heater replacement applications
• Low NOx heater applications
• Raymote app-connected heater systems
• Outdoor heater installations with proper clearances
• 0–4,500 ft elevation installations where approved

Always confirm fuel type, BTU requirement, elevation range, gas line sizing, regulator requirements, electrical service, water flow, venting needs, installation location, Wi-Fi availability, and local code requirements before ordering.

Installation Notes

This heater must be installed by a qualified pool professional, licensed gas technician, or licensed contractor as required by local code. Proper installation requires correct propane gas supply sizing, gas pressure verification, electrical wiring, bonding, grounding, water flow verification, plumbing layout, combustion air, and venting where required.

Before installation, confirm the site uses propane / LP gas and that the gas supply can support a 399,000 BTU heater. Confirm that the installation elevation, equipment pad clearance, water flow, and venting conditions meet manufacturer requirements.

Water chemistry must be maintained within recommended ranges to protect the copper heat exchanger and preserve heater performance. Improper water balance, poor flow, incorrect gas pressure, restricted venting, or improper installation can damage the heater and may void warranty coverage.

Customer-Facing Q&A

Q: What is the Raypak 018039?
A: It is a Raypak P-R404A-EP-C AVIA digital propane pool and spa heater rated at 399,000 BTU.

Q: What is the SKU?
A: The SKU is 018039.

Q: What is the UPC / barcode?
A: The UPC / barcode is 840891047308.

Q: What fuel type does this heater use?
A: This model uses propane gas / LP gas.

Q: Is this a natural gas heater?
A: No. This is the propane model. Natural gas versions use different part numbers.

Q: How many BTUs is this heater?
A: This heater is rated at 399,000 BTU, also listed as 399.0 MBTU/h.

Q: Does this heater have built-in Wi-Fi?
A: Yes. The AVIA platform includes built-in Wi-Fi for connected control and service alerts.

Q: Does it work with the Raymote app?
A: Yes. This heater is designed for Raymote app control when connected and configured properly.

Q: What heat exchanger does this model use?
A: This model uses a copper heat exchanger.

Q: What header material does it use?
A: This model uses polymer headers.

Q: Is this Low NOx certified?
A: Yes. This heater is listed as Low NOx certified.

Q: What is the efficiency rating?
A: This AVIA heater is commonly listed with an 84% efficiency rating.

Q: What elevation range is this model listed for?
A: This listing references 0–4,500 ft elevation compatibility. Always confirm suitability for the installation location before ordering.

Q: Should this heater be professionally installed?
A: Yes. Professional installation is strongly recommended because this heater requires proper gas, electrical, plumbing, venting, bonding, and safety setup.