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OEM Jandy JXi 400N Natural Gas Heater 399,000 BTUs Low NOx. The Jandy JXi 400N Natural Gas Pool & Spa Heater with cupronickel exchanger is a compact yet powerful solution for heating pools and spas with 399,000 BTUs of energy-efficient output. Its compact design (22.1" D x 21.6" W x 26.5" H) makes installation and retrofitting easy, even when replacing existing heaters like the MasterTemp® or Max-E-Therm® without requiring plumbing adjustments.
Built to deliver 84% thermal efficiency, this low-NOx heater adheres to DOE energy regulations, ensuring performance and environmental responsibility. It seamlessly integrates with Jandy’s AquaLink® systems for remote control via the iAquaLink® app, allowing for convenient, on-the-go operation. The JXi 400N also accommodates flow rates from 30 to 100 GPM and can be used indoors or outdoors for versatile installation options.
Energy-Efficient Heating
84% thermal efficiency rating and low-NOx design surpasses strict DOE Energy Efficiency requirements.
Automation-Ready
Compatible with AquaLink® automation systems for anytime, anywhere control from your mobile device using the iAquaLink™ app.
Ultra-Compact Lightweight Design
Easy to store, transport, and install, JXi easily fits on a 2’ x 2’ pad and is 38% lighter with a 28% smaller footprint
Best Retrofit Option
Plumbing flexibility for quick Mastertemp® and Max-E Therm® replacement that requires no plumbing adjustments.
Flexible Installation
Top can be easily removed for increased accessibility and rotated 180 degrees so you never need to rotate headers. Also includes a flip up electrical panel for convenient setup and service.
Versa Plumb® -Ready
Installation in the Versa Plumb system reduces plumbing costs and increases energy efficiency, all while using the smallest footprint available.
Specification
- Includes Versaflo Bypass - No
- Depth - 22.1"
- Efficiency - 84%
- Energy Star - No
- Exchanger - Cupronickel
- Fuel Tipe - Natural Gas
- Headers - Hi-Temp Poly
- Height - 26.5"
- Input Rate Bruh - 399K BTUH
- Max. GPM - 100
- Min. GPM - 30
- Pool Surface Area - up to 600sft
- Professional Installation Required - Yes
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Smart Product - Automation Compatible
- Vent Diameter - 8"
- Weight - 126 lbs
- Width - 22.9"
Highlights
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Energy Efficient: 84% thermal efficiency for eco-friendly operation
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Compact & Retrofit-Friendly: Easy to install, especially as a replacement for MasterTemp® or Max-E-Therm®
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Automation-Ready: Control via iAquaLink® with integration to AquaLink® systems
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Versatile Flow Rate: Handles water flow from 30 to 100 GPM
- Enhanced Efficiency: Optional VersaFlo™ technology for greater energy savings
OEM Jandy JXi 400N Natural Gas Pool & Spa Heater | 399,000 BTUs
The Jandy JXi 400N delivers outstanding heating performance in a compact, lightweight design. Engineered for residential and commercial pools and spas, this heater offers 399,000 BTUs of powerful heating while maintaining high energy efficiency and easy automation integration.
Energy-Efficient Heating
84% Thermal Efficiency
Exceeds DOE energy standards for an eco-friendly and cost-effective operation.
Low-NOx Design
Reduces emissions for a more environmentally responsible heating solution.
Compact and Lightweight
Space-Saving Design
Fits on a 2’ x 2’ pad with a 28% smaller footprint compared to similar heaters.
Easy to Handle
At just 126 lbs, it simplifies storage, transport, and installation.
Seamless Automation Integration
AquaLink® Compatible
Easily connects with AquaLink® systems for control through the iAquaLink® app.
Remote Monitoring
Operate your pool or spa heater from anywhere, anytime via mobile device.
Retrofit-Friendly Installation
MasterTemp® and Max-E-Therm® Replacement
Designed for quick swaps without the need for plumbing adjustments.
Rotatable Top and Flip-Up Panel
Top can rotate 180° for easy access, and the flip-up electrical panel streamlines service and setup.
Enhanced Performance Options
VersaFlo™ Integrated Bypass (Optional)
Provides additional energy savings when heating is not always required.
Versa Plumb®-Ready
Integrates with Jandy’s Versa Plumb® system for reduced plumbing costs and maximum efficiency.
Specifications
Fuel Type
Natural Gas
Input Rate
399K BTUH
Efficiency
84% Thermal Efficiency
Heat Exchanger
Cupronickel
Flow Rate
30 to 100 GPM
Dimensions
22.1" Depth × 22.9" Width × 26.5" Height
Vent Diameter
8"
Weight
126 lbs
Installation
Professional installation required; smart automation compatible
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