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Jandy JXiQ Natural Gas Heater, Versaflo, 400K BTU, Copper Exchanger | JXIQ400NK
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
| Specification | Details |
|---|---|
| Brand | Jandy |
| Series | JXiQ |
| Product Type | Pool & Spa Gas Heater |
| Model / SKU | JXIQ400NK |
| Heating Capacity | 400K BTU |
| Fuel Type | Natural Gas |
| Heat Exchanger | Copper |
| Bypass Feature | VersaFlo Integrated Bypass |
| Emissions | Low NOx |
| Application | Pool and Spa |
| Automation Compatibility | Compatible with select Jandy AquaLink / iAquaLink systems |
| Control Type | Digital Interface |
| Electrical | 115V / 230V auto-sensing |
| Water Connection | 2" |
| Product Weight | 126 lbs |
| Barcode / UPC | 052337290845 |
| Dimensions (Shipping) | 39.8 x 23.3 x 28.5 in. |
Warranty & Compatibility
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
Q: Is the JXIQ400NK natural gas or propane?
A: The JXIQ400NK is the natural gas version.
Q: How many BTUs is this heater?
A: This model is rated at 400K BTU.
Q: Does this model include VersaFlo?
A: Yes. This model includes VersaFlo integrated bypass technology.
Q: What heat exchanger does this heater use?
A: This listing is for the copper heat exchanger version.
Q: Can this heater be used for both pools and spas?
A: Yes. The Jandy JXiQ400NK is designed for pool and spa heating applications.
Q: Can it connect to Jandy automation?
A: Yes. The JXiQ heater platform is automation-ready with compatible Jandy AquaLink / iAquaLink systems.
Q: Does this require professional installation?
A: Yes. Gas pool heaters should be installed by a qualified pool professional or licensed gas technician.
Manuals & Sell Sheets
Manufacturer reference documents for this equipment family. Confirm your exact model and production revision before use.
Jandy JXiQ Natural Gas Heater, Versaflo, 400K BTU, Copper Exchanger | JXIQ400NK
$3,799.00
$4,498.00you save $699.00
Oversized item: $350 flat-rate freight shipping, added at checkout. Free shipping on orders over $50 does not apply to this item. Questions? Call or text 725-205-1783.
Fast Shipping
Most in-stock orders ship same day · Order by 2pm PT · Free over $50
Shipping calculated at checkout.
| Specification | Details |
|---|---|
| Brand | Jandy |
| Series | JXiQ |
| Product Type | Pool & Spa Gas Heater |
| Model / SKU | JXIQ400NK |
| Heating Capacity | 400K BTU |
| Fuel Type | Natural Gas |
| Heat Exchanger | Copper |
| Bypass Feature | VersaFlo Integrated Bypass |
| Emissions | Low NOx |
| Application | Pool and Spa |
| Automation Compatibility | Compatible with select Jandy AquaLink / iAquaLink systems |
| Control Type | Digital Interface |
| Electrical | 115V / 230V auto-sensing |
| Water Connection | 2" |
| Product Weight | 126 lbs |
| Barcode / UPC | 052337290845 |
| Dimensions (Shipping) | 39.8 x 23.3 x 28.5 in. |
Part Numbers & Compatibility
- The K suffix means a factory-installed VersaFlo.
Also known as: JXiQ 400, JXiQ400NK, Jandy 400K heater
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