| 摘要 |
A device for regulating the combustion air flow rate in a wall-mounted boiler (1) with a sealed chamber in which a usual burner is present, this air reaching said chamber through a corresponding duct (2) opening (at 6) into said chamber, to this latter there also being connected a flue gas discharge duct (3), said ducts (2, 3) being separate or coaxial, said device comprising at least one element for throttling the air passage cross-section (6) of said feed duct (2) to enable the air flow rate to the sealed chamber to be varied; this element is a movable member (10) operable from the outside of the duct (2), and is lockable in the position in which it throttles the passage cross-section (6) of this latter by again operating from the outside of said duct (2). <IMAGE> |
