Controlling Common Outdoor Sources

Mouse over the picture above to see messages which are referenced in more detail below.

(Hot Spot on tar container)

Remember...“Tar and asphalt roof repair creates toxic compounds, and is best undertaken when building is unoccupied.”
At a minimum, make sure that tar preparation and buckets are not placed by the air intake.

(Hot Spot on air intake)

Remember...“Outdoor air flow may need to be temporarily closed when roof repairs or other major short term sources or pollutants are close to the air intake to avoid contaminating the interior space with toxic contaminants.
However, reduction in outdoor air for long periods will cause an increase of contaminants from indoor sources and will degrade your indoor air quality.