The Jandy JXi™ Natural Gas Pool and Spa Low-NOx Heater 400K BTU is designed to deliver powerful heating performance for residential pools and spas. With a 400,000 BTU natural gas output, this heater is ideal for homeowners who want faster water heating, especially for pool/spa combinations and larger residential pools.

The JXi series features a compact, lightweight design that makes installation easier in tight equipment areas. Its Low-NOx design helps meet emissions requirements in many areas while delivering dependable pool and spa heating performance.

This model is a strong option for pool owners looking to replace an older gas heater or upgrade to a powerful Jandy heater compatible with modern pool equipment systems.

Key Features

• 400,000 BTU heating capacity
• Natural gas pool and spa heater
• Low-NOx design
• Compact JXi series footprint
• Fast heating for pools and spas
• Great for pool/spa combinations
• Suitable for residential inground pools
• Designed for efficient heat transfer
• Easy-access service design
• Compatible with many pool automation systems
• Good replacement option for older gas heaters