Features: 1. The tried and tested three-pass and wet back structure.2. Lateral-cut tube technology: increase heat efficiency.3. Big hearth technology: increase radiated area, decrease emission of NOx, reduce boiler volume.4. Big flue gas tube: reduce the resistance of smoke flow and consumption of electricity. 5. Intelligent control system: PLC and 5.7 touch panel.6. Fiberglass heat preservation: low surface temperature and heat loss. 7. Corrugated hearth: more safety, increase radiation and convection. 8. Multi-level sealing for flue gas chamber: no flue gas leakage.9. Each boiler shall be subject to strictly inspection and testing before delivery, including hydraulic pressure testing and X ray inspection. 10. Selecting the most suitable burner to match the boiler so as to guarantee safety and reach rated output. 11. Main components, such as burners, pumps, water level meters, valves are limited to renowned brands. 12. Stainless steel plate protective cladding for surface: fine appearance and effective protection. 13. A economizer is optional and possible to save 10% fuel and decrease noise 20dB. 14. Applicable fuels: gas, oil, dual fuel.Applications: - Providing heating for central air-conditioning system and radiators. - Providing continuous hygienic hot water, together with water-water heat exchangers. - Providing heating for industrial use. producing area:China supplying capacity:30 sets/month