Secondary air set for house chimneys - comprises a measuring aperture on component(s) of secondary air set etc.

摘要

The set is forcibly controlled and automatically working, or combined, and is to be used in coupler between the fire box and chimney, with the coupler containing a measuring aperture (17) on at least one component (10-12) of the secondary air set (9). The measuring aperture can be provided on member behind the application region of the secondary air set in the gas flow direction, or on components allocated to the set. Preferably, there are closure members (21) for the measuring aperture, which may be dimensioned to permit swivel motion of a measuring probe.