i dont know if this is the right section but we have an old (15/16yrs) greenhouse circular fan that is inserted into a side panel of glass,about 6ins across with an outer protective cowl and a plastic fan which goes either way ,depending on the temp of the g/house whether it spins air out or in, it has a cord to let you close the vent as req.,we had 2 but after that long storage i was only able to make one good one. its simple,effective and i want to get hold of another,does anyone know any firms/shops still selling them,or their proper name?,as i have tried to uncover one on the net but all they offer is solar powered fans or the auto(wax) vents or big industrial greenhouse powered units,
come on you web geniuses,make an old man happy(is it only old men ? or is it women as well that have trouble with the wind?)

come on you web geniuses,make an old man happy(is it only old men ? or is it women as well that have trouble with the wind?)

) so i have put it up onto the greenhouse side and its working okay...so far..
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