JXi™ Pool & Spa Heater

The Total Package Pool & Spa Heater

VersaFlo Integrated Bypass technology for JXi available installed from the factory (select models) or as an easy retrofit to any JXi pool and spa heater on site.

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The Total Package Pool & Spa Heater

The JXi 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 pool and spa heater is available in three BTU sizes, 200K, 260K, 399K, and offered in both natural and propane gas models.

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

  • Ultra-compact, 2'x2' 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, no plumbing adjustments required for quick and easy replacement of Mastertemp® and Max-E-Therm® heaters
  • 84% thermal efficiency rating and low-NOx design surpasses strict DOE energy-efficiency requirements**

VersaFlo Integrated Bypass technology for JXi available installed from the factory (select models) or as an easy retrofit to any JXi on site.

  • Offers up to 20 percent additional energy savings***
  • Automatic actuation of flow bypass valve is based on call for heat and does not require human interaction
  • The flow bypass valve is integrated into the JXi's header, requiring no external plumbing modifications
  • The hydraulic savings of VersaFlo make it the perfect complement to Versa Plumb®, which reduces plumbing costs and maximizes energy efficiency in the smallest footprint available
*Refer to JXi manual for proper heater clearances that may apply.
**Click here for Department of Energy ratings
***Versus a similar system without VersaFlo .


  • Ultra-Compact Lightweight Design - Easy to store, transport, and install, the JXi pool and spa heater 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 pool 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.


Model Number Firing Rate Heater Width Vent Diameter Depth Height Weight Min. GPM Max. GPM
JXi200 200K BTU 22.9" 6" (15cm) 22.1" 26.5" 117 lbs* 20 120
JXi260 260K BTU 22.9" 7" (18cm) 22.1" 26.5" 120 lbs 25 120
JXi400 399K BTU 22.9" 8" (20cm) 22.1" 26.5" 126 lbs 40 120

*Actual weight may vary.


Models Description
JXI200N Jandy Pro Series JXI Pool Heater 200 Natural
JXI200P Jandy Pro Series JXI Pool Heater 200 Propane
JXI260N Jandy Pro Series JXI Pool Heater 260 Natural
JXI260P Jandy Pro Series JXI Pool Heater 260 Propane
JXI400N Jandy Pro Series JXI Pool Heater 400 Natural
JXI400P Jandy Pro Series JXI Pool Heater 400 Propane
JXiVFKIT VersaFlo Bypass Accessory Kit for JXi Heaters

Parts Breakout Diagram

Pool Heaters

JXi Heater Parts
Launch our online catalog viewer to review breakout diagrams and part numbers.

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Frequently Asked Questions

Click a frequently asked question below to see the answer.

Are heating appliances compatible with salt water chlorination?

For the last 20 years, Zodiac has been using a patented technology associating polyamides and titanium, both of which are totally free from the effects of corrosion. Today over 120,000 appliances have been installed without any corrosion defects. If a salt water chlorination method is being used, it is important to install a check valve between the heater outlet and the salt water chlorinator, to prevent high concentrations of chlorinated water from back siphoning into the heater.

Must my pool be covered (cover, rolling shutter...) or sheltered if it is to be heated?

No, it is perfectly possible to heat an "open air" pool without a cover or a shelter. The power and fuel requirements is similiar to heating a house with the windows open! This is why we recommend the use of an insulating cover to limit heat loss to the open air when the pool is being heated. A covered or sheltered pool will reduce the heater power and fuel costs.


JXi with VersaFlo Sell Sheet

Item #: SL6971
File Size: 6254264
Language: EN

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Brochure: JXi Heater

Item #: SL6355
File Size: 3060784
Language: EN

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Installation and Operation Manual: JXi Heater

Item #: H0574300
File Size: 20351373
Language: EN

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Counter Mat: JXi Heater

Item #: SA6362
File Size: 1313735
Language: EN

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Quick Reference Guide: JXi Heater

Item #: H0454800
File Size: 10350877
Language: EN

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Blower Installation Instructions: JXi Heater

Item #: H0439800
File Size: 832812
Language: EN

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