
Jandy JXiQ™ 400 ASME Natural Gas Pool & Spa Heater – Copper Heat Exchanger & Bronze Header
The Smartest, Most Durable Way to Heat Commercial Pools and Spas
The Jandy JXiQ™ 400 ASME Natural Gas Pool & Spa Heater delivers exceptional performance, energy efficiency, and long-lasting durability—making it the ideal choice for commercial pools, spas, hotels, fitness centers, and high-use aquatic facilities. Engineered with ASME compliance, this heater is built to withstand heavy-duty demands while providing precise, reliable heating.
Designed for easy installation, low-maintenance servicing, and cost-efficient operation, the JXiQ 400 features SMART sensors, Bluetooth® connectivity, and self-diagnostic technology—so you spend less time troubleshooting and more time enjoying perfectly heated water.
Key Benefits of the Jandy JXiQ™ 400 ASME Natural Gas Heater
✔ Commercial-Grade Construction
Built with burly bronze headers and 30% thicker-walled copper fin tubes than standard models, this heater can handle the rigors of high-demand commercial use while resisting corrosion and wear.
✔ Energy-Efficient Performance
With an 84% thermal efficiency rating and a low-NOx design, the JXiQ exceeds DOE energy requirements, reducing operating costs without sacrificing heating speed.
✔ Advanced SMART Technology
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Low Gas Pressure Sensor – Prevents ignition if gas supply is insufficient.
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Flow Optimization System – Measures inlet and outlet temperature rise to prevent heat exchanger damage.
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Auto-Sensing Power Input – Adapts to supplied power automatically, eliminating manual adjustments.
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Industry’s Largest Digital Display – 50% larger than before, showing up to 80 characters for easy reading.
✔ Flexible Installation & Replacement
Compact 2’ x 2’ footprint, 38% lighter and 28% smaller than comparable models. Perfect drop-in replacement for MasterTemp® and Max-E-Therm® heaters—no plumbing changes required.
✔ Easy Servicing & Protection
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Top access panel rotates 180° for maintenance convenience.
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Flip-up electrical panel for quick service.
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Fully enclosed shell prevents rodent damage.
JXiQ™ 400 ASME Specifications
Specification | Details |
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Model | JXiQ 400 ASME Natural Gas |
BTU Input | 399,000 BTUH |
Thermal Efficiency | 84% |
Heat Exchanger | Copper |
Headers | Bronze |
Fuel Type | Natural Gas |
ASME Compliant | Yes |
Max Flow Rate (GPM) | 100 |
Min Flow Rate (GPM) | 30 |
Pool Surface Area | Up to 600 sq. ft. |
Vent Diameter | 8" |
Dimensions (W x D x H) | 23.3" x 22.1" x 26.5" |
Weight | 168 lbs |
VersaFlo Bypass | No |
Why Choose the Jandy JXiQ™ 400 ASME for Your Commercial Pool or Spa?
If you need a reliable, energy-efficient, and heavy-duty pool heater that’s easy to install, service, and operate, the JXiQ 400 ASME Natural Gas Heater is the ultimate solution. Its robust build, smart controls, and space-saving design make it perfect for hotels, resorts, health clubs, and other commercial pool facilities.
Boost efficiency, extend heater life, and enjoy precise water temperatures—choose the Jandy JXiQ™ 400 ASME Natural Gas Pool & Spa Heater for dependable commercial pool heating year-round.