vent a matic for ventilation

[easton coop]

I have managed to buy a 'vent a matic' for my coop and was wondering if anyone else has one and if it's been successful

 

[easton coop]

they don't use any electric just a light breeze will get them going. It will suck out all the hot air and smells! I really want to know if anyone else uses one as i can't decide if to put it in the greenhouse or coop! they are £15 in the shops and i managed to get one on ebay for £3 what a bargain!