Shining points: - This product has synthesized the merits of atmospheric pressure boiler and pressurized boiler. - Patented technology: the body designed according to atmospheric pressure type and a built-in 1.0MPa pressure copper heat exchanger, effectively solved the problem of providing heating and clean hot water for top buildings.- Bi-coil pipe technology: providing hygienic water and hot water for different use in the same time is available. Features: 1. Tubes with horizontal furrows: improve heat efficiency. 2. Big combustion room: increase radiated area, decrease emission of NOx. 3. Big flue gas tube: reduce the resistance of smoke flowing and consumption of electricity. 4. Intelligent control system: multi-boiler control and remote control is available. 5. Compressed fin-tubes without cutting and paring: increase the area of heat exchanger and effectively transferring heat. 6. Faceplates are designed hooking type and easy for assembling and maintenance. 8. Antisepsis technique: dirt avoidance and supply clean water. 9 Surface treatment with anti-bask and transfer-color resistant powder, keep the original color for a long time.10. A condenser is optional for gas-fired boiler. It is possible to save 12% fuel and decrease noise 20~30dB. 11.Applicable fuels: gas,oil,dual fuel. Applications: 1. Providing heating for air-conditioning system and hygienic hot water.2. Built-in heat exchanger can be designed to type of bi-coil pipe, providing hot water with two different usages in the same time. 3. The built in heat exchanger can be designed according to different pressure requirement. producing area:China supplying capacity:50 sets/month