So now I need some sort of pull rod that can pull a steel flap down into place???
This is what I still wanna do.
Add a steel sheet or flap with normal hinges on the inside of the front wall of the chimney. Hinges at the bottom of flap and flap standing upright in chimney.
Hole through front wall with rod to hold top of flap against wall.
When I want to close chimney I release the rod or push it in and the flap 'falls' back to the rear wall to close the opening.
Steel sheet is the same width as chimney but a bit higher than the chimney is deep so that when closed it is not flat but at an angle.
It will then also act as a throttle and smoke shelf inside the chimney.
A whirly bird on the top with a remote push / pull locking pin???
Whirly bird is vir die voëls.
Kyk eerder na 'n dakkie oor die opening wat op 'n vliegtuig vlerk konsep werk.
Alternatief kan jy 'n waaier insit. Dit sal keer dat daar te veel lug deur trek as die waaier af is ook.
PS As die wind verkeerd waai en daar is oop deure waar negatiewe druk kan onstaan dan gaan die rook in die huis inkom.