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Jandy Pro Series JXi Low NOx 400,000 BTU Propane Heater

List price: $3,383.99  
Savings: $934.99 (28%)
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Product Name:
Jandy Pro Series JXi Low NOx 400,000 BTU Propane Heater
Product Code:
Maximum Altitude:
10,000 FT
BTU Rating:
400,000 BTUs
Heater Type:
Connection Size:
2 Inches
Voltage (if required):
120 / 240 V
Replacement Parts
1 Year

Hot things come in small sizes

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. This high-efficiency, low-NOx JXi is 400,000 BTUs in size and accepts propane (Minimum 460 lb propane tank required for operation).

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.


  • 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.

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.
  • Minimum 460 lb propane tank required.

1 Year Manufacturer's Warranty

**Refer to JXi manual for proper heater clearances that may apply.
***Please see Easy Replacement section of manual for details.

Jandy JXi Owner's Manual (H0404700.PDF, 5,977 Kb) [Download]

Jandy JXi Information Brochure (SL6355.pdf, 2,306 Kb) [Download]

Jandy Pro Series JXi Low NOx 400000 BTU Propane Heater (JXi_French_manual_200_260_400.PDF, 9,964 Kb) [Download]

Jandy Pro Series JXi Low NOx 400000 BTU Propane Heater French brochure (JXI_French_Brochure.pdf, 3,279 Kb) [Download]

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