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OEM Jandy JXi 400N ASME Pool & Spa Heater | 399,000 BTUs | Commercial Grade. The Jandy JXi 400N ASME Pool & Spa Heater is engineered for demanding commercial environments, delivering powerful 399,000 BTU performance with 84% thermal efficiency. ASME-certified for commercial use, it features robust heat exchanger tubes and corrosion-resistant bronze headers to ensure long-lasting durability under high-stress conditions.
Thanks to its ultra-compact, lightweight design (approx. 126 lbs), installation is fast and easy, even in tight spaces. Compatible with Jandy’s AquaLink® automation systems, the JXi 400N allows remote operation through the iAquaLink® app. Optional VersaFlo™ technology is available to enhance hydraulic efficiency and further reduce energy consumption, making this heater both powerful and eco-friendly.
Energy-Efficient Heating
84% thermal efficiency rating and low-NOX design surpasses strict DOE Energy Efficiency requirements
Commercial Grade Models
Small but strong enough to handle the rigors of non-residential use, ASME compliant JXiQ heaters feature burly bronze headers and 30%1 thicker-walled, robust copper heat exchanger tubes and corrosion-resistant bronze headers to meet the high stresses of commercial installations. Plumbing flexibility for quick MasterTemp® and Max-E Therm® replacement that requires no plumbing adjustments
Ultra-Compact Lightweight Design
Fits on a 2’ x 2’ pad and is 38% lighter with a 28% smaller footprint. Easy to install. Top easily removed and rotated 180 degrees for increased accessibility; includes flip up electrical panel.
Automation-Ready
Compatible with AquaLink® automation systems for anytime, anywhere control from your mobile device using the iAquaLink™ app.
The JXiQ™ ASME Compliant Gas Pool & Spa Heater for Commercial use takes the guess work out of pool heating making it easy to use, install and service.
Built with the brawn to withstand the high-use demands of commercial properties, ASME compliant JXiQ heaters are ultra-compact and constructed with bronze headers and thicker-walled copper fin tubes.
-
Commercial Grade Models
Small but strong enough to handle the rigors of non-residential use, ASME compliant JXiQ heaters feature burly bronze headers and 30%1 thicker-walled, robust copper or heat exchanger tubes and corrosion-resistant bronze headers to meet the high stresses of commercial installations
-
Energy-Efficient Heating
84% thermal efficiency rating2 and low-NOX design surpasses strict DOE Energy Efficiency requirements -
Low Gas Pressure Sensor
Ensures there’s enough gas pressure to safely ignite
-
Optimize Flow
Measures temperature rise between the inlet and outlet
to optimize flow and avoid heat exchanger failures
-
Auto-Sensing Power Input
Automatically adjusts to supplied power when installed — no cards to flip and no wires to change -
Largest Display in the Industry
Digital display is 50% larger than before and
capable of showing 80 characters -
Best Drop-In Option
Plumbing flexibility for quick MasterTemp® and Max-E Therm®
replacement that requires no plumbing adjustments -
Flexible Installation. Easy Servicing.
Top easily removed and rotated 180 degrees for increased accessibility; includes flip up electrical panel -
Keeps Critters Out
No more chewed up wires. The JXiQ is made with a fully encased shell to protect against rodent intrusion and damage -
Ultra-Compact Lightweight Design
Fits on a 2’ x 2’ pad and is 38% lighter with a 28% smaller footprint
Specification
- Includes Versaflo Bypass - No
- Depth - 22.1"
- Efficiency - 0.84
- Exchanger - Copper
- Fuel Type - Natural Gas
- Headers - Bronze
- Height - 26.5"
- Input Rate BTUH - 399K BTUH
- Max. GPM - 100
- Min. GPM - 30
- Pool Surface Area - up to 600 sqft
- Vent Diameter - 8"
- Weight - 168 lbs
- Width - 23.3"
Highlights
-
Commercial-Grade Build: ASME-certified with bronze headers for superior corrosion resistance
-
High Thermal Efficiency: 84% thermal efficiency for optimal performance and energy savings
-
Compact and Retrofit-Friendly: Small footprint simplifies installation, even in tight spaces
-
Automation Ready: Full integration with AquaLink® systems for remote control via iAquaLink®
- Optional VersaFlo™ Bypass: Enhances hydraulic performance and boosts energy savings
Additional Info
OEM Jandy JXi 400N ASME Pool & Spa Heater | 399,000 BTUs | Commercial Grade
The Jandy JXi 400N ASME Natural Gas Pool & Spa Heater is engineered for high-use commercial environments, offering robust 399,000 BTU heating performance, superior durability, and energy efficiency in an ultra-compact, easy-to-install design.
Commercial-Grade Construction
ASME-Certified Durability
Built with bronze headers and 30% thicker-walled copper heat exchanger tubes to withstand high-stress commercial applications.
Corrosion-Resistant Build
Engineered for long-lasting performance, even in harsh, high-demand settings.
Energy-Efficient Heating
84% Thermal Efficiency
Exceeds strict DOE energy efficiency standards for lower operational costs.
Low-NOx Design
Environmentally friendly combustion reduces harmful emissions.
Ultra-Compact, Lightweight Design
Space-Saving Footprint
Fits on a 2’ x 2’ pad, 28% smaller footprint, and approximately 38% lighter than similar models.
Easy Handling
Top panel easily rotates 180° and includes a flip-up electrical panel for faster setup and servicing.
Seamless Automation Integration
AquaLink® Compatible
Control heating remotely via the iAquaLink® app for ultimate convenience.
Auto-Sensing Power Input
Automatically detects and adjusts to supplied voltage — no rewiring needed.
Optimized for Commercial Retrofits
MasterTemp® and Max-E-Therm® Replacement
Designed to simplify retrofitting without requiring plumbing changes.
Critter-Proof Shell
Fully enclosed shell prevents rodent damage for added reliability.
Performance Enhancements
Optional VersaFlo™ Integrated Bypass
Boosts hydraulic performance and further increases energy savings when installed.
Flow Optimization Technology
Built-in sensors measure inlet/outlet temperature to optimize flow rates and protect the heat exchanger.
Specifications
Fuel Type
Natural Gas
Input Rate
399K BTUH
Efficiency
84% Thermal Efficiency
Heat Exchanger
Copper (ASME-grade thickness)
Headers
Bronze
Flow Rate
30 to 100 GPM
Dimensions
22.1" Depth × 23.3" Width × 26.5" Height
Vent Diameter
8"
Weight
168 lbs
Installation
Professional installation required; automation compatible
- Description
- Additional Info
- Reviews
OEM Jandy JXi 400N ASME Pool & Spa Heater | 399,000 BTUs | Commercial Grade. The Jandy JXi 400N ASME Pool & Spa Heater is engineered for demanding commercial environments, delivering powerful 399,000 BTU performance with 84% thermal efficiency. ASME-certified for commercial use, it features robust heat exchanger tubes and corrosion-resistant bronze headers to ensure long-lasting durability under high-stress conditions.
Thanks to its ultra-compact, lightweight design (approx. 126 lbs), installation is fast and easy, even in tight spaces. Compatible with Jandy’s AquaLink® automation systems, the JXi 400N allows remote operation through the iAquaLink® app. Optional VersaFlo™ technology is available to enhance hydraulic efficiency and further reduce energy consumption, making this heater both powerful and eco-friendly.
Energy-Efficient Heating
84% thermal efficiency rating and low-NOX design surpasses strict DOE Energy Efficiency requirements
Commercial Grade Models
Small but strong enough to handle the rigors of non-residential use, ASME compliant JXiQ heaters feature burly bronze headers and 30%1 thicker-walled, robust copper heat exchanger tubes and corrosion-resistant bronze headers to meet the high stresses of commercial installations. Plumbing flexibility for quick MasterTemp® and Max-E Therm® replacement that requires no plumbing adjustments
Ultra-Compact Lightweight Design
Fits on a 2’ x 2’ pad and is 38% lighter with a 28% smaller footprint. Easy to install. Top easily removed and rotated 180 degrees for increased accessibility; includes flip up electrical panel.
Automation-Ready
Compatible with AquaLink® automation systems for anytime, anywhere control from your mobile device using the iAquaLink™ app.
The JXiQ™ ASME Compliant Gas Pool & Spa Heater for Commercial use takes the guess work out of pool heating making it easy to use, install and service.
Built with the brawn to withstand the high-use demands of commercial properties, ASME compliant JXiQ heaters are ultra-compact and constructed with bronze headers and thicker-walled copper fin tubes.
-
Commercial Grade Models
Small but strong enough to handle the rigors of non-residential use, ASME compliant JXiQ heaters feature burly bronze headers and 30%1 thicker-walled, robust copper or heat exchanger tubes and corrosion-resistant bronze headers to meet the high stresses of commercial installations
-
Energy-Efficient Heating
84% thermal efficiency rating2 and low-NOX design surpasses strict DOE Energy Efficiency requirements -
Low Gas Pressure Sensor
Ensures there’s enough gas pressure to safely ignite
-
Optimize Flow
Measures temperature rise between the inlet and outlet
to optimize flow and avoid heat exchanger failures
-
Auto-Sensing Power Input
Automatically adjusts to supplied power when installed — no cards to flip and no wires to change -
Largest Display in the Industry
Digital display is 50% larger than before and
capable of showing 80 characters -
Best Drop-In Option
Plumbing flexibility for quick MasterTemp® and Max-E Therm®
replacement that requires no plumbing adjustments -
Flexible Installation. Easy Servicing.
Top easily removed and rotated 180 degrees for increased accessibility; includes flip up electrical panel -
Keeps Critters Out
No more chewed up wires. The JXiQ is made with a fully encased shell to protect against rodent intrusion and damage -
Ultra-Compact Lightweight Design
Fits on a 2’ x 2’ pad and is 38% lighter with a 28% smaller footprint
Specification
- Includes Versaflo Bypass - No
- Depth - 22.1"
- Efficiency - 0.84
- Exchanger - Copper
- Fuel Type - Natural Gas
- Headers - Bronze
- Height - 26.5"
- Input Rate BTUH - 399K BTUH
- Max. GPM - 100
- Min. GPM - 30
- Pool Surface Area - up to 600 sqft
- Vent Diameter - 8"
- Weight - 168 lbs
- Width - 23.3"
Highlights
-
Commercial-Grade Build: ASME-certified with bronze headers for superior corrosion resistance
-
High Thermal Efficiency: 84% thermal efficiency for optimal performance and energy savings
-
Compact and Retrofit-Friendly: Small footprint simplifies installation, even in tight spaces
-
Automation Ready: Full integration with AquaLink® systems for remote control via iAquaLink®
- Optional VersaFlo™ Bypass: Enhances hydraulic performance and boosts energy savings
OEM Jandy JXi 400N ASME Pool & Spa Heater | 399,000 BTUs | Commercial Grade
The Jandy JXi 400N ASME Natural Gas Pool & Spa Heater is engineered for high-use commercial environments, offering robust 399,000 BTU heating performance, superior durability, and energy efficiency in an ultra-compact, easy-to-install design.
Commercial-Grade Construction
ASME-Certified Durability
Built with bronze headers and 30% thicker-walled copper heat exchanger tubes to withstand high-stress commercial applications.
Corrosion-Resistant Build
Engineered for long-lasting performance, even in harsh, high-demand settings.
Energy-Efficient Heating
84% Thermal Efficiency
Exceeds strict DOE energy efficiency standards for lower operational costs.
Low-NOx Design
Environmentally friendly combustion reduces harmful emissions.
Ultra-Compact, Lightweight Design
Space-Saving Footprint
Fits on a 2’ x 2’ pad, 28% smaller footprint, and approximately 38% lighter than similar models.
Easy Handling
Top panel easily rotates 180° and includes a flip-up electrical panel for faster setup and servicing.
Seamless Automation Integration
AquaLink® Compatible
Control heating remotely via the iAquaLink® app for ultimate convenience.
Auto-Sensing Power Input
Automatically detects and adjusts to supplied voltage — no rewiring needed.
Optimized for Commercial Retrofits
MasterTemp® and Max-E-Therm® Replacement
Designed to simplify retrofitting without requiring plumbing changes.
Critter-Proof Shell
Fully enclosed shell prevents rodent damage for added reliability.
Performance Enhancements
Optional VersaFlo™ Integrated Bypass
Boosts hydraulic performance and further increases energy savings when installed.
Flow Optimization Technology
Built-in sensors measure inlet/outlet temperature to optimize flow rates and protect the heat exchanger.
Specifications
Fuel Type
Natural Gas
Input Rate
399K BTUH
Efficiency
84% Thermal Efficiency
Heat Exchanger
Copper (ASME-grade thickness)
Headers
Bronze
Flow Rate
30 to 100 GPM
Dimensions
22.1" Depth × 23.3" Width × 26.5" Height
Vent Diameter
8"
Weight
168 lbs
Installation
Professional installation required; automation compatible
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