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OEM Jandy JXi 400P Propane Pool & Spa Heater | 399,000 BTUs | Low-NOx | Automation Ready. The Jandy JXi 400P Propane Pool & Spa Heater delivers 399,000 BTUs of powerful and energy-efficient heating in an ultra-compact design. With an 84% thermal efficiency rating and low-NOx emissions, it meets strict DOE energy standards while offering eco-friendly performance for both residential and commercial pools and spas.
Weighing approximately 126 pounds and measuring just 22.1" D x 21.6" W x 26.5" H, the JXi 400P is perfect for fast installations and retrofits—often replacing heaters like MasterTemp® or Max-E-Therm® without plumbing modifications. It's fully automation-ready, compatible with Jandy’s AquaLink® systems and the iAquaLink® app for convenient remote control. Models with optional VersaFlo™ Integrated Bypass technology offer even greater energy efficiency.
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 - Copper
- Fuel Tipe - Propane
- 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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High-Efficiency Heating: 399,000 BTUs with an 84% thermal efficiency rating
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Ultra-Compact Footprint: Installs easily in tight equipment pads and retrofit applications
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Low-NOx Technology: Reduces emissions while meeting DOE standards
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Automation Ready: Integrates with Jandy AquaLink® and iAquaLink® for remote operation
- Optional VersaFlo™ Bypass: Improves hydraulic efficiency and reduces energy consumption
OEM Jandy JXi 400P Propane Pool & Spa Heater | 399,000 BTUs | Low-NOx | Automation Ready
The Jandy JXi 400P delivers powerful, eco-friendly propane heating with a compact, easy-to-install design, ideal for residential and commercial pools and spas.
High-Efficiency, Eco-Conscious Heating
84% Thermal Efficiency
Optimized for maximum heat output while minimizing energy usage.
Low-NOx Emissions
Meets strict DOE energy standards with reduced environmental impact.
Compact, Installation-Friendly Design
Ultra-Compact Footprint
Occupies less space with a 2’ x 2’ pad footprint — 38% lighter and 28% smaller than traditional heaters.
Lightweight and Portable
At only 126 lbs, the JXi 400P is easy to move, store, and install, even in tight spaces.
Seamless Automation Integration
AquaLink® and iAquaLink® Compatible
Manage your pool heater remotely with full system control via your mobile device.
Auto-Sensing Power Input
Simplifies installation by automatically adapting to the supplied electrical input.
Service and Retrofit-Friendly Features
Easy Maintenance Access
Top panel easily removes and rotates 180° for full service access; flip-up electrical panel simplifies setup.
Quick Retrofit Installations
Designed for fast replacement of MasterTemp® and Max-E-Therm® heaters without plumbing changes.
Flexible Installation
Versa Plumb® System Ready
Installs seamlessly into Jandy’s Versa Plumb® system to lower plumbing costs and increase energy efficiency.
Optional Hydraulic Optimization
VersaFlo™ Integrated Bypass (optional)
Enhances water flow efficiency when heating isn’t needed, saving even more energy and reducing pump strain.
Specifications
Fuel Type
Propane
Input Rate
399K BTUH
Efficiency
84% Thermal Efficiency
Heat Exchanger
Copper
Headers
Hi-Temp Polymer
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; automation compatible
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