6 A B C stûv 21 - 012022 - EN Control of the air inlet The air control of your stûv 21 varies depending on installation. The compensation air inlet (Ø160mm) and the combustion air inlet (Ø100mm) will ideally be fitted with a valve enabling adjustment of their opening. Three configurations combustion air compensation air combustion air + compensation air recommended in well insulated houses, fitted with mechanically controlled ventilation traditional houses low energy houses and more benefits option of use with a fan, easy to use use without fan in accordance with certain regulations (France, Italy, …) option of use with a fan, control of compensation air in accordance with certain regulations (France, Italy, …) restrictions ensure the control of compensation air in open fire mode with room air ensure the control of combustion air and compensation air with the valve control of the valve only in open fire mode
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