The Jandy 399,000 BTU 84% AFUE Natural Gas Pool Heater with Cupronickel Heat Exchanger ASME JXiQ Series (JXIQ400NS) is a powerful and durable pool and spa heating solution designed to deliver reliable temperature control and efficient performance for residential and commercial aquatic applications. Built as part of the Jandy JXiQ Series, this high-capacity natural gas heater combines advanced heating technology, ASME-rated construction, and corrosion-resistant components for long-term reliability.

The Jandy JXIQ400NS delivers 399,000 BTU heating capacity with an 84% AFUE efficiency rating, providing fast and consistent heating performance for large pools and spas. Featuring a cupronickel heat exchanger and ASME certification, this heater is designed for enhanced durability, improved corrosion resistance, and dependable operation in demanding pool environments.

Key Features

• 399,000 BTU Heating Capacity – Provides powerful heating performance for large pools and spas
• 84% AFUE Efficiency Rating – Helps provide efficient natural gas heating performance
• Natural Gas Operation – Delivers reliable and fast pool heating using natural gas fuel
• JXiQ Series Design – Engineered for advanced and dependable pool heating applications
• Cupronickel Heat Exchanger – Offers enhanced corrosion resistance and long-term durability
• ASME Certified Construction – Designed for demanding commercial and high-performance applications
• Fast Heat Recovery – Helps quickly raise and maintain pool water temperatures
• Durable Outdoor Design – Built for reliable operation in pool environments

Product Specifications

• Brand: Jandy
• Series: JXiQ Series
• Model: JXIQ400NS
• Product Type: Natural Gas Pool Heater
• Heating Capacity: 399,000 BTU
• Efficiency Rating: 84% AFUE
• Fuel Type: Natural Gas
• Heat Exchanger: Cupronickel
• Certification: ASME
• Application: Residential and Commercial Swimming Pools & Spas
• Installation Type: Outdoor Pool Equipment

Benefits

• Provides powerful heating for large pool and spa applications
• Extends the swimming season with dependable temperature control
• Cupronickel heat exchanger improves resistance to corrosion
• ASME-rated construction supports demanding pool environments
• Helps maintain consistent and comfortable water temperatures
• Designed for reliable long-term heating performance

Compatibility & Installation

The Jandy JXIQ400NS Natural Gas Pool Heater is designed for:

• Large residential swimming pools
• Commercial pool applications
• Spas and aquatic facilities
• Pool heating upgrades
• New pool equipment installations

Installation considerations:

• Confirm proper heater sizing based on pool volume, climate, and heating requirements
• Verify natural gas supply and connection requirements
• Ensure proper ventilation and installation clearances
• Maintain proper water chemistry for maximum heat exchanger life
• Follow manufacturer installation guidelines and local safety codes
• Professional pool equipment installation is recommended

Frequently Asked Questions

What is the heating capacity of the Jandy JXIQ400NS?
The heater provides 399,000 BTU of heating capacity for large pool and spa applications.

What fuel type does this heater use?
This model operates using natural gas.

What is the efficiency rating of this pool heater?
The Jandy JXIQ400NS features an 84% AFUE efficiency rating.

What type of heat exchanger does this heater have?
It features a cupronickel heat exchanger designed for enhanced corrosion resistance and durability.

What does ASME certification mean for this heater?
ASME-rated construction indicates the heater is designed to meet recognized standards for pressure vessel safety and durability in demanding applications.