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Product Summary

Jandy ProSeries JXi 400,000 BTU Propane Gas Pool Heater - OPEN BOX by Jandy Pool Products
OPEN BOX - Like New! The Jandy ProSeries JXi 400,000 BTU Propane Gas Pool Heater sets a new standard in pool and spa heating technology with its ultra-compact size, lightweight deisng, and installation flexibility, making it a top choice for pool professionals and pool owners everywhere.

Frequently Purchased Together

Total Price for 2 items $88.98

Product Details


Condition: Like New - Unused - Original Packaging and Original Documentation Included

Jandy JXi Swimming Pool & Spa Heater - 400K BTU Propane Gas
Ultra-Compact - Lightweight Design - Easy to Install

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.

Quick Reference Highlights

  • Easy Installation - Unions & Jandy Snorkel Included fopr Versa Plumbing Option
  • Fastest Installation - Pro-driven features for the fastest, most customer-friendly installation
  • Ultra-Compact - 2' x 2' footprint for small space requirements and maximum installation flexibility
  • Lightweight Design - Weights less than 120 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 Efficiency - 83% thermal efficiency rating and low-NOx design surpasses strict DOE Energy Efficiency requirements

Jandy JXi  Features:

Ultra-Compact Lightweight Design

Flexible Installation

Versa Plumb Ready

Easy Access

Easy Replacement

Sidewall Ventilation

Technical Details:

High-Efficiency Gas Train and Heat Exchanger Design

  1. Copper fin heat exchanger tubes for efficient heat transfer
  2. Single stainless steel burner with robust design
  3. Blower-driven gas and air mix for reliable performance
  4. Hot surface igniter for consistent start-ups

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

Additional Features:

  • 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
  • 1 Year Limited Manufacturer's Warranty

Ultra Compact Lightweight Design:

  • Firing Rate - 400K BTU
  • Width - 22.0"
  • Vent Diameter - 8"
  • Depth - 22.1"
  • Height - 26.5"
  • Weight - 126 lbs.
  • Minimum GPM - 40
  • Maximum GPM - 120

Product Specifications

  • Manufacturer: Jandy Pool Products
  • Jandy Pool Products Item Number: JXi400P
  • UPC/GTIN: 00052337010696
  • Condition: New
  • Warranty: 1 Year

Jandy Pool Products Product Videos

Jandy Pool Products Item JXi400P Suggested Applications

  • All Concrete, Colored Plaster and Painted Pools
  • All Inground Vinyl Liner Swimming Pools
  • All Aboveground Swimming Pools

Shipping Rates

Orders Under $50 $5.00
Orders Over $50 FREE
3-Day Premium add $50.00
2-Day Premium add $65.00

Shipping Policies:

  • We only ship orders to the 48 contiguous United States.
  • Chemicals, pool paint, and some oversized items, will only ship via ground service.
  • Items shipped via Freight Service, such as pool heaters, will only ship via ground service.
  • All orders shipping to Maryland will incur a 6% sales tax charge.
  • Some items, including hazmat, may require a Direct Signature upon delivery.
  • Shipments must be inspected by customer prior to signing delivery receipt.
  • Orders containing small and light-weight items may ship via FedEx SmartPost or USPS.

Order Returns

You may return an item sold to you by up to 30 days after purchase. The product must be in good condition, unused, in original packaging, and must have all parts, accessories and paperwork; returns without these requirements and/or guidelines will not be accepted.

If a delivery attempt is unsuccessful on order requiring a direct signature, a 15% - 25% re-stock fee may be applied should the order be returned to by the carrier.

Any claims to missing parts, items or damaged goods for any orders must be made within 15 days of delivery date. We are not able to credit your shipping and handling fees if the wrong product was ordered due to customer error. However, if you received the wrong products due to an error on our behalf, we will pay for the return services fees and you will receive a full refund or exchange.

To return an item to, please call 800-4MY-POOL to get a Return Merchandise Authorization number (RMA) and return instructions. Any items returned without an RMA number will be refused. We will process your refund upon receipt of the returned product.

Products that cannot be returned:

  • Pool Chemicals
  • Special Orders
  • Pool Liners
  • Pool Paint

Products that may incur a re-stock fee of 15% - 25%:

  • Pool Cleaners *
  • Pool Heaters *
  • Pool Pumps *
  • Pool Filters *
  • Pool Lights & Fixtures *
  • Pool Ladders & Rails *
  • Pool Slides *
  • Pool Chlorinators *
  • Custom Manufactured Safety Covers
  • Pool & Spa Electronics or Controls *
  • In-Stock Safety Covers
  • Pool Covers that are Ordered and for the Incorrect Pool Size
  • Spa Cover Lifters *
  • Umbrellas & Umbrella Stands, and Hammocks *

* These products must not have been used, installed, or attempted to have been installed. All products must include original paperwork, parts & accessories, and everything accompanied with the product.

Concealed damage on any ground shipment must be reported within 3 business days. Freight shipments must be inspected for damages prior to customer signing delivery receipt. Please email any information regarding concealed damage to Please reference your order number in all order related email correspondence.

Customer is responsible for any/all return shipping charges. Some returns may be subject to a 15% - 25% restock fee that will be deducted from your refund.

Please call 800-4MY-POOL if you have questions regarding this return policy.

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