You should always ventilate with fresh air during all phases of installation your carpet. This includes exhausting to the outside and avoiding re-circulation. Most emissions from the installation disappear quickly with adequate air exchange and ventilation.
Vacuum the old carpet before removal to minimize the amount of dust particles.
Vacuum the floor immediately after the old carpet and cushion have been removed.
Continue operating the ventilation system at normal room temperature for up to 72 hours after installation. If possible, open doors and windows to increase the flow of fresh air.
If the carpet is to be glued to the floor, use a low-emitting floor covering adhesive.
If somebody in your household is very sensitive, it is better for them to avoid the area or leave the premises while the old carpet is being removed and the new carpet installed.
If possible, unroll the new carpet in a well-ventilated area for 24 hours or more before installation.

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