Product Overview

The Jandy JXiQ400NK is a 400K BTU natural gas pool and spa heater designed for fast heat-up, efficient operation, and modern equipment pad performance. This model includes VersaFlo integrated bypass technology and a copper heat exchanger, making it a strong option for residential pool and spa systems that need powerful heating with smart flow management.

The JXiQ platform is built for installation ease, compact equipment pads, and convenient operation. It also supports modern Jandy automation features when paired with compatible AquaLink / iAquaLink systems.

Ideal For

Large residential in-ground pools, pool and spa combinations, natural gas equipment pad installations, and customers replacing a compatible 400K BTU natural gas heater.

Key Features

• 400K BTU natural gas pool and spa heater
• VersaFlo integrated bypass technology
• Copper heat exchanger
• Compact JXiQ heater design
• SMART sensor technology for performance monitoring
• Automation-ready with compatible Jandy AquaLink / iAquaLink systems
• Digital user interface for heater control and diagnostics
• Low NOx emissions design
• Designed for pool and spa heating applications
• Professional installation strongly recommended

Benefits

The Jandy JXiQ400NK provides high-output heating for larger pools and pool/spa combinations. The 400K BTU rating helps deliver fast heat-up times, while the VersaFlo integrated bypass helps improve hydraulic efficiency by managing water flow through the heater.

The copper heat exchanger provides effective heat transfer for standard pool water applications, and the compact heater design helps simplify installation on crowded equipment pads. When connected to compatible Jandy automation, users can control heater operation through AquaLink / iAquaLink systems.

Specifications

Confirm Before Ordering

Please confirm fuel type, BTU size, gas line sizing, electrical requirements, plumbing configuration, venting requirements, automation compatibility, and local code requirements before ordering. This model is natural gas and is not the propane version.

Professional installation by a qualified pool heater technician or licensed gas professional is strongly recommended. Warranty coverage may depend on proper installation, documentation, and Jandy / Fluidra warranty requirements.

Customer-Facing Q&A

Is the JXIQ400NK natural gas or propane?
The JXIQ400NK is the natural gas version.

How many BTUs is this heater?
This model is rated at 400K BTU.

Does this model include VersaFlo?
Yes. This model includes VersaFlo integrated bypass technology.

What heat exchanger does this heater use?
This listing is for the copper heat exchanger version.

Can this heater be used for both pools and spas?
Yes. The Jandy JXiQ400NK is designed for pool and spa heating applications.

Can it connect to Jandy automation?
Yes. The JXiQ heater platform is automation-ready with compatible Jandy AquaLink / iAquaLink systems.

Does this require professional installation?
Yes. Gas pool heaters should be installed by a qualified pool professional or licensed gas technician.