Flue block | Article about flue block by The Free Dictionary
A solid concrete masonry unit with curved faces, intended for use with other similar units in laying up a round flue.
References in periodicals archive
The inquest was told the living room door had been closed and no windows were open and with the chimney flue blocked
there was nowhere for the fumes to escape.
Experts found that a flue blocked
by a fallen brick had been spewing deadly fumes into the family home in Colchester, Essex.