i think peters version is quite safe to have installed all year round... just remove the duct tape from the normal air inlet
http://www.solarvan.co.uk/insight/airintakeblocked.jpg
http://www.solarvan.co.uk/insight/openinlet.jpg
even with one made in non perforated sheet i think it is quite safe
maybe a combo of the perforated and non perforated would be optimal?
__________________
Bo
"Who is the fool.. the fool or the fool who follows him?"
"No rest for the wicked"
"Blessed are the "cracked" for it is they who let in the light."
"Life is to short, dont waste it... too much"
"I'm not crazy, they just forgot to lock the door at the mental hospital"
"Intelligence is the ability to articulate one's stupidity"
"The difference between genius and stupidity is that genius has its limits"
"The true genius has no limits"
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