Jandy JXI260N Compact Swimming Pool Spa Hot Tub Natural Gas Heater 260K BTU Pool Spa Heater Energy-efficient - 83% thermal efficiency rating and low-NOx design surpasses strict DOE energy efficiency requirements. Ultra-Compact Lightweight Design - Easy to store, transport, and install, the JXi 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.