Condensing gas boiler ONNLINE II DUO 25 - dual-function, model DCB834
Condensing boilers from the Onnline series are innovative, modern devices offered in both single and dual-function versions that are used in both radiator and underfloor heating systems and for domestic hot water preparation. The devices are ideal for installation in both new construction and yet to be upgraded installations. Elegant and modern design make the device fit perfectly into any interior. Onnline condensing boilers are extremely environmentally friendly thanks to the use of the latest generation of components. Stainless steel heat exchanger and cylindrical burner guarantee very low NOx emissions (highest class 6). The devices have a seasonal energy efficiency class A for space heating and, in the case of dual-function boilers, also for hot water heating.The Onnline boiler can work with a temperature controller and an outdoor temperature sensor for even better control of the unit's operation. It is also possible to manage heating via the Internet using the Basic Package for the Termet Comfort System. This is extremely important for users who value comfort.Do you need help? Do you have any questions?Ask a question and we'll respond promptly, publishing the most interesting questions and answers for others. 
