Recently had roof replaced on 70 year old home. Ridge vents and soffitt vents were installed. There are two existing gable vents (4'X 4')and a large fan that sits in the center of the attic. There is an ornamental grate that allows access to the attic from the second floor - however, it also allows a cold air draft in the winter and a warm air "draft" in the summer.
-Is the fan still necessary, and is there a better location than the center of the attic?
-Can I replace the grate with a solid access door to the attic?
BTW, a central air unit was installed about two years ago and the home has steam heat.
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