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How-to-improve-air-ventilation-in-attic, ask the carpenter: the best way to ventilate an attic, save on cooling costs. ask the expert home improvement. ap file rob robillard - globe correspondent june 1, 2017 12:00 am q. we’ve received two bids to re-do our roof and add much needed ventilation to our attic, which is not ventilated at all.. Article summary x. the simplest way to help cool down your room with airflow is to prop open a door or window to allow the hot air to get out. additionally, a box or ceiling fan is a cost-effective way to circulate the air going in and out of your room.,