LHS series oil/gas boiler Yuanda LHS series oil/gas boiler adopts vertical structure, large corrugated furnace and patented threaded smoke tube technology, equipped with international first-line brand burners and valve groups, to achieve multiple interlocking protection functions and fully protect the safe operation of equipment. Core technologies: 1. Low-pressure operation, safe and reliable, fast steam output; 2. Vertical, small area, low investment; 3. Large furnace design, high combustion efficiency and high thermal efficiency; 4.4. Self-locking protection for flameout and power failure