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JANDY JXIQ400NNK LOW NOX VERSAFLO NATURAL GAS POOL & SPA HEATER – 400K BTU, POLYMER HEADERS, CUPRO-NICKEL HEAT EXCHANGER
Heating Capacity: 399,000 BTU
Thermal Efficiency: 84%
Fuel Type: Natural Gas
Heat Exchanger: Cupro-Nickel
Bypass: VersaFlo Integrated
Maximum Water Flow: 100 GPM
Emissions: Low NOx
Power: 115V / 230V Auto-Sensing
The Jandy JXIQ400NNK Natural Gas Pool & Spa Heater delivers 399,000 BTU at 84% thermal efficiency from one of the most compact cabinets in its class - Jandy rates the JXi platform at roughly a 28% smaller footprint than comparable competitor heaters.
This configuration pairs a cupro-nickel heat exchanger with the VersaFlo integrated bypass. The cupro-nickel exchanger is the right specification for salt-chlorinated pools and aggressive water chemistry, while VersaFlo automatically routes flow around the heater when heating is not called for, reducing hydraulic losses and protecting the exchanger. Factory-installed VersaFlo also extends the heat exchanger warranty to five years.
A weld-free combustion chamber and venturi-driven air and gas mixing system improve corrosion resistance and combustion stability, and a thermal regulator valve balances flow and temperature automatically. SMART sensor monitoring and a digital interface handle diagnostics, and the heater is automation-ready with Jandy AquaLink and iAquaLink control.
Key Features
- 399,000 BTU heating capacity
- 84% thermal efficiency
- Natural Gas
- Cupro-nickel heat exchanger for salt water and aggressive water chemistry
- VersaFlo integrated bypass for hydraulic efficiency
- 5-year heat exchanger warranty with factory-installed VersaFlo
- Weld-free combustion chamber for corrosion resistance
- Venturi-driven air and gas mixing system
- Thermal regulator valve for balanced flow and temperature control
- Corrosion-resistant temperature sensors
- SMART sensor performance monitoring
- Digital control interface
- Automation-ready with Jandy AquaLink and iAquaLink
- Low NOx design
- Ultra-compact, lightweight cabinet
Specifications
| Specification | Details |
| Brand | Jandy |
| Part Number | JXIQ400NNK |
| Series | JXiQ |
| Fuel Type | Natural Gas |
| BTU Input | 399,000 BTU |
| Thermal Efficiency | 84% |
| Heat Exchanger | Cupro-Nickel |
| Integrated Bypass | VersaFlo |
| Maximum Water Flow | 100 GPM |
| Water Connections | 2" |
| Power | 115V / 230V Auto-Sensing |
| Emissions | Low NOx |
| Automation | AquaLink / iAquaLink Compatible |
| Heat Exchanger Warranty | 5 Years (Factory-Installed VersaFlo) |
What's Included
- Jandy JXIQ400NNK Natural Gas Pool & Spa Heater
- Cupro-nickel heat exchanger assembly
- VersaFlo integrated bypass
- Digital control interface
- Installation and operation documentation
The Jandy JXIQ400NNK combines 399,000 BTU of output, 84% efficiency, a cupro-nickel exchanger, and factory VersaFlo bypass in a compact, automation-ready package built for salt-chlorinated pools.
Learn more at Jandy:
https://www.jandy.com/en/products/pool-heating/heaters/jxiq
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