Jandy JXi260N Gas Pool & Spa Heater

Why homeowners consider it

• It carries Jandy's 84% EnergyGuide thermal efficiency rating, the same figure as the 400,000 BTU model and at the top of what a current low-NOx, non-condensing pool heater delivers. The 200,000 BTU JXi is labeled 83%, so 260 is the smallest JXi that gets the better number. (The JXi is not an atmospheric heater: its manual describes a venturi-type combustion system that self-compensates for changes in barometric pressure.)
• The cabinet is the same size as every other JXi — 22.1 inches wide, 21.6 inches deep and 26.5 inches high — so the small unit takes no less space than the big one but fits the same 2 ft by 2 ft pad footprint on a crowded Sarasota side yard.
• Gas piping is far more forgiving than the 400. Jandy's own table allows 50 feet of 1-inch natural gas pipe to a JXi260 where a JXi400 gets only 20 feet, which on a retrofit is often the difference between reusing the existing line and trenching a new one.
• It talks to automation properly. A four-pin RS-485 connection puts the heater on a Jandy AquaLink system as a smart device rather than a relay, and from there it is controllable in the iAquaLink app.
• Service access is good for the size: the top cover lifts off and can be rotated 180 degrees, and the electrical raceway swings up out of the way, which matters when the heater is wedged between a filter and a wall.

What to know before buying

• The published warranty is one year. Jandy's limited warranty covers JXi heaters for one year with no labor coverage, and the five-year heat-exchanger term applies only to models with VersaFlo factory-installed — which the 260 standard SKU is not. If warranty length matters to you, price the VersaFlo version or a different brand before deciding.
• The standard exchanger is copper, and Jandy's own documents disagree about the cupro-nickel upgrade in this size. Section 12.3 of the JXi manual lists JXI260NN and JXI260PN alongside JXI400NN and JXI400PN as cupro-nickel models, and the spare-parts table carries a dedicated 260 CuNi column; the 2024 catalog addendum prints cupro-nickel part numbers only in the 400 size, and we could not find a 260 cupro-nickel listing in the distribution channel. On a salt pool or a coastal lot, get written confirmation from the distributor that a cupro-nickel 260 is orderable before you budget for one.
• It needs 30 GPM through the heat exchanger and will not tolerate more than 100 GPM. On a variable-speed pump the heating speed has to be programmed high enough to satisfy the water pressure switch, which is factory set to 7 psi.
• Natural gas has to be at the address. Large parts of Sarasota and Manatee County have no gas main, which pushes you to the propane JXI260P plus a tank and a delivery contract — and Jandy states that indoor installation is not recommended for liquid propane heaters.
• Jandy's warranty does not apply to product bought through the internet or other e-commerce platforms, and it requires installation and service by a licensed, qualified pool professional. Buying the box online to save a few hundred dollars can cost you the warranty entirely.
• Outdoor operating ambient is published down to 40°F. Below freezing, Jandy asks for the heater to be in a protected outdoor shelter.

Warranty, term by term

The warranty only matters on the parts that actually fail. Here is how this one splits up.

Why the heat exchanger matters

How we scored it

Real Modern Pool Heating installations

We have not published a job-site photo for this exact model yet. Installation photos on this site are only ever our own work, and we label each one as the exact model or as a representative install.