JXi 400,000 BTU, Electronic, Propane

JXi 400,000 BTU, Electronic, Propane

The Total Package

The JXi heater sets a new standard in pool and spa heating technology with its ultra-compact size, lightweight design, and installation flexibility, making it a top choice for pool professionals and pool owners everywhere. The high-efficiency, low-NOx JXi is available in four BTU sizes, 200K (coming soon!), 260K, 399K, and offered in both natural and propane gas models.


  • Energy-efficient - 83% thermal efficiency rating and low-NOx design surpasses strict DOE energy efficiency requirements.

  • Ultra-Compact Lightweight Design - Easy to store, transport, and install, the JXi is 38% lighter with a 28% smaller footprint.
    *Smaller footprint compared to major competitor models

  • Flexible Installation - 180° rotatable top so you never need to rotate headers.

  • Versa Plumb®-Ready - Installation in the Versa Plumb system reduces plumbing costs and increases energy efficiency, all using the smallest footprint available. Sweep elbow included in all JXi models

  • Easy Access - Electrical panel flips up for ease of service.

  • Easy Replacement - 3-port header for easy plumbing and drop-in replacement of MasterTemp, Max-E-Therm, and Jandy Pro Series heaters.

  • Sidewall Ventilation - Provides versatility and ease of installation.

  • High-Efficiency Gas Train and Heat Exchanger Design

    • Copper fin heat exchanger tubes for efficient heat transfer

    • Single stainless steel burner with robust design

    • Blower-driven gas and air mix for reliable performance

    • Hot surface ignitor for consistent start-ups

  • User-Friendly Control - Digital interface for effortless temperature control and diagnostics with run-time and cycle meter.

  • Pro-driven features for the fastest, most customer-friendly installation include:

    • Ultra-Compact - 2' x 2' footprint for small space requirements and maximum installation flexibility.**

    • Lightweight Design - Weighs less than 126 pounds unpackaged for easy maneuverability and transport.

    • Best Retrofit Option - Plumbing flexibility for quick Mastertemp® and
      Max-E-Therm® replacement that requires no plumbing adjustments.***

    • Easy to Control - RS485 digital interface is Aqualink®/iAqualink™-compatible for pool and spa automation.

Technical Details

  • Corrosion-resistant stainless steel header bar for extreme heat exchanger durability.

  • Venturi-driven air and gas mix for enhanced performance.

  • Reliable, balanced flow and temperature control with thermal regulator valve.

  • Differentiated limit switches meet applicable product safety standards.

  • Corrosion-resistant temperature sensors for reliable operation.

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