Jandy JXi JXI400NN Natural Gas Pool & Spa Heater - 399,000 BTU - Cupronickel
$4,296.00
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Jandy JXi JXI400NN Natural Gas Pool & Spa Heater - 399,000 BTU - Cupronickel
$4,296.00
Currently sold out
Free standard shipping · eligible US orders
Standard shipping: 3–5 business days (estimated).
Check delivery timing for your ZIP code
Large equipment may ship by freight and require a delivery appointment.
Final shipping options and applicable taxes are confirmed at checkout.
The Jandy JXi JXI400NN is a compact, high-performance natural gas pool and spa heater with 399,000 BTU input and a durable cupronickel heat exchanger for added corrosion resistance.
Model details
- Model: JXI400NN
- Fuel: Natural Gas
- Input: 399,000 BTU
- Heat exchanger: Cupronickel
- Compact 2 ft x 2 ft footprint
- Digital controls and Jandy automation compatibility
Professional installation required. Installation must comply with applicable gas, electrical, venting, plumbing, and local code requirements.
Fuel and heater sizing
This is the natural gas configuration. Confirm that your supply matches before ordering. Gas-heater BTU input is the fuel input rating; usable heat output also depends on thermal efficiency. Pool volume, starting water temperature, desired warm-up time and heat loss determine the capacity needed.
Installation requirements
A qualified installer should confirm gas-line capacity and pressure, electrical supply, water flow, equipment clearances and installation altitude. Indoor installations need the correct manufacturer-approved venting arrangement. Check the existing pad and plumbing connection positions when replacing another heater; matching BTU size alone does not guarantee a direct fit.
Complete the installation
Site-specific gas fittings, electrical work, venting accessories and installation labor are separate. For remote control, verify the listed interface and any required network or automation hardware. Maintain the manufacturer's water-balance targets and keep the circulation system in good condition to protect the heat exchanger.
Compatibility & installation
Check the exact model and the specifications above before ordering. For equipment and replacement parts, confirm the required voltage, connections, dimensions and compatibility with your existing system.
Need help? Contact us with your model number before purchasing. Equipment requiring electrical, gas or plumbing connections should be installed by a qualified professional.
Shipping & Delivery
We ship within the United States. Standard shipping is currently free for eligible destinations at checkout. Faster shipping options are shown when available for your order; the final options and charges appear at checkout.
Dispatch and arrival dates depend on the item, destination and shipping method. Need an estimated arrival date before ordering? Contact us with the product model and delivery ZIP code.
Large equipment may ship by freight and require a delivery appointment. Inspect the shipment on arrival, photograph visible damage and note it on the delivery receipt.
Returns
Eligible products may be returned within 30 days of delivery if new, unused, uninstalled and in their original packaging. A restocking fee of up to 20% may apply; return shipping and other conditions apply.