018045 | Raypak Avia HD 404 Low Nox Pool And Spa Heater with NiTek

The Raypak Avia HD 404 Low NOx Pool and Spa Heater (Model 018045) is a high-performance natural gas unit engineered for efficient heating in both residential and commercial pool systems. With a 399,000 BTU/h input and 84% thermal efficiency, it delivers consistent and rapid water heating. Its advanced NiTek heat exchanger technology offers 300% greater erosion resistance than copper and 200% more than cupronickel, ensuring long-term durability. Designed for flexible installation, the unit is compatible with both indoor and outdoor setups and Category I & III venting. Wi-Fi integration via Raymote™ allows remote control and monitoring, while its 135 lb frame supports flows up to 125 GPM on standard 120/240VAC power.

Raypak Avia HD 404A Low Nox Features

Industry-First Technology

Managing your pool heater has never been easier or smarter. AVIA is built with an innovative Wi-Fi enabled control system that allows you to manage your pool heater with one accessory through the Raymote app – so no need for a separate control panel to manage your pool heater. 

With Raypak’s industry-first technology, NiTek, this AVIA HD is 300% more erosion resistant than copper, and 200% more than cupronickel.

Specifications

• 900% more nickel
  Compared to cupronickel in critical surfaces
• Longevity
  NiTek reduces more than 50% scale formation
• Max Efficiency
  NiTek Produces up to 2% more thermal efficiency than cupronickel, and the same thermal efficiency as copper
• Superior Strength
  300% more erosion resistant than copper
  200% more than cupronickel

Key Features

• Smart Automation
  Smart pool control automation system built right into the heater.
• Smart Scheduling
  AVIA heats and learns the size of your pool.
• Smart Ecosystem Manager
  Manage your heater, pump or water feature.
• Integrated Wi-Fi
  Smart connection for real-time service alerts.
• ProTek Shield™
  Protects the heat exchanger from corrosion.

 

• Raymote™ Temperature & Heater Control
  On-the-go control of your pool temperature.
• Small & Easy to Install
  AVIA weighs 135 pounds.
• Installation Versatility
  Can be rotated on 3 sides with flexible connections.
• Serviceability
  Most serviceable heat exchanger in the market.
• Efficiency
  84% efficiency rating and is low NOx certified.

Highlights

• High Output Efficiency: 399,000 BTU/h input and 84% efficiency for reliable heating performance
  
• Durable NiTek Exchanger: Outperforms copper and cupronickel with superior erosion resistance
  
• Smart Wi-Fi Control: Raymote™ system enables remote access and operation
  
• Flexible Installation Options: Supports indoor/outdoor use with compatible venting systems
  
• Strong Flow Support: Handles up to 125 GPM, ideal for a variety of pool and spa setups

Additional Info

Raypak Avia HD 404 Low NOx Pool and Spa Heater | Model 018045

The OEM Raypak Avia HD 404 is a powerful natural gas pool and spa heater designed for residential and commercial applications. It delivers 399,000 BTU/h of heating capacity at 84% thermal efficiency and features NiTek™ technology, Wi-Fi-enabled Raymote™ controls, and versatile installation options.

High-Efficiency Heating Performance

399,000 BTU/h Heating Power

Delivers fast and consistent water temperature control for pools and spas of all sizes.

84% Thermal Efficiency

Ensures optimal energy use, reducing operational costs while maintaining effective heat output.

Certified Low NOx Emissions

Environmentally responsible design meets air quality standards for low nitrogen oxide output.

NiTek™ Heat Exchanger Technology

300% More Erosion Resistance Than Copper

Provides exceptional durability for longer service life under demanding water conditions.

200% More Resistant Than Cupronickel

Built for corrosion-heavy environments, including saltwater and chemically treated pools.

50% Less Scale Formation

Minimizes internal buildup, preserving heating efficiency and lowering maintenance needs.

900% More Nickel on Critical Surfaces

Enhances structural strength and thermal performance under high-stress conditions.

Integrated Wi-Fi with Raymote™ Control

Remote Temperature and System Management

Control temperature and monitor heater status from any mobile device using the Raymote™ app.

Real-Time Service Alerts

Get instant notifications and diagnostics for easy service and upkeep.

Unified Smart Pool Control

Manage heater, pump, and other water features from one centralized app interface.

Flexible Installation and Compact Design

Indoor and Outdoor Compatible

Designed for flexible installations with both Category I and III venting options.

Lightweight and Easy to Handle

Weighing under 135 lbs., it simplifies transportation and setup.

Three-Side Rotatable Configuration

Supports multiple plumbing and wiring arrangements, ideal for custom installations.

ProTek Shield™ Internal Corrosion Protection

Long-Term Defense Against Corrosive Elements

Guards against chemical and saltwater damage to extend heat exchanger life.

Increased Longevity and Reliability

Helps maintain peak performance with reduced wear and lower service demands.

Key Product Highlights

Specifications and Features

• 399,000 BTU/h input (natural gas)

• 84% thermal efficiency

• NiTek™ heat exchanger for extended durability

• 50% less scale, 900% more nickel in core areas

• Certified low NOx emissions

• Integrated Raymote™ Wi-Fi control

• Lightweight: approx. 135 lbs.

• Compatible with up to 100 GPM flow

• Indoor/outdoor installation with rotatable design

Smarter, Stronger, and More Efficient Pool Heating

With cutting-edge technology, premium materials, and built-in smart controls, the Raypak Avia HD 404 delivers unmatched heating performance and longevity for pool and spa systems of any size.