The carpet acts as a filter gathering the dirt from the air.
Dirt around edge of carpet.
Filtration soiling occurs when there is an imbalance in the air ventilation of the room.
To clean up these stains you need water and vigorous scrubbing.
This will help release any trapped dirt dust or debris.
Along the edges of carpeted stairs.
According to procare the premium carpet upholstery care specialists.
The first step to preventing filtration soiling is to be sure that your ducts are clean.
Let the carpet dry then vacuum again to remove any surface dirt and loose fibers that remain.
You may need to use detergent for more persistent stains.
Preventing filtration lines filtration soil around the edges of the room is a fact of life in most homes with central air systems but you can minimize it by cleaning your furnace air filters regularly or replacing them when they are dirty.
You can find evidence of filtration soiling anywhere airflow is restricted near carpeting.
The black lines are a result of filtration soil.
You can also use a dampened white rag to scrub your carpet edges.
Along the edge of walls where the carpet meets the wall.
Along the lines of floorboards under carpet only in extreme cases.
This soiling is called filtration soiling because it comes from air passing through the carpet as it is attempting to get through the crack between the.
Start with the hvac system.
Along the corners of a room.
As the air is forced through the ventilation system it picks up whatever dirt is in the ducts and carries it into the living areas of the home and thus potentially into the carpet.
Make 2 3 passes along the skirting boards with your scrub brush.