So I wanted to increase the R-value of the hearth in front of my existing fireplace insert in masonry chimney. I just got in the mail the hearth board itself which is a type 2 hearth pad. It’s one of those times that fits the existing heart almost perfectly and is right up against the insert the fan at floor level. I noticed the pad itself is pretty dusty, as the material it’s made of is mainly a fiberboard of some sort. I always run the insert fan When insert is in use. Once I wipe down the hearth pad for use, would it be expected that indoor air quality Will be an issue? I ask this because I’m wondering if the fan will be pulling in some of the dustiness of the fiberboard. Thanks in advance for your input.