Vents

Submitted By
Agreemp1
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Q:

Our home is 4 years old,  built over good crawl space - vents are spaced - What is the theory about closing and opening the vents during summer and winter?

We have always opened during the summer for ventilation and closed the during the winter to keep the floors warm - is this correct? 

We're now hearing differnt ways to handle - help!  Thanks  - Robert