Over the last few weeks I have been involved with installing some extraction fans in the local Intermediate School classrooms, to allow air circulation within the said clasrooms.
These are pre-fab rooms, added on bit by bit over the 1970's.
Here is a shot of some of the fans that I installed:
Also here is a shot of the conduit runs for one of the rooms:
Finally, here is a shot of one of the fans.
Shown is the 6" (150mm) dia ducting protruding through the roofing iron and through a Dek-tite rubber sealing Membrane.
And here is all what the kiddies will see from below:
[This message has been edited by Trumpy (edited 01-24-2004).]