Pre-weighted filters

Respirable Dust Testing measures the amount of contaminates that are flowing through your air duct vents. Using specialized equipment we take reading from your system and send them to a lab to be tested to determine the air quality level that your air duct vents are providing your office.

Air quality can be a serious issue in a commercial setting. Dust can affect sinuses, lungs, and the entire respiratory system. Understanding the differences in filter types, dust particles and the dust measurement and dust sampling method can help maintain a safe and healthy work environment.

There are three categories of dust: thoracic, respirable and inhalable (inspirable) dusts. The air we breathe contains each type of dust. The difference amongst the dust types is the dust particle diameter. Thoracic dust particles are under 25 microns. Respirable particles are under 10 microns in diameter. Inhalable dust particles are under 100 microns. Dust sampling methods vary, depending upon the type of dust that needs to be evaluated.

There are two types of filters used in particulate monitoring (dust sampling), pre-weighted and matched weight. Made of either PVC or mixed cellulose ester (MCE). PVC filters are normally used for gravimetric analyses due to their durability. MCE filters are used when testing for metals.

Pre-weighed filter analysis begins when the filters are equilibrated with a consistent temperature and humidity. They are then weighed. The filters are then placed in cassettes and sealed with color coded bands based on NADCA criteria and labeled with an identification number.

The filters are then taken to a lab to be weighed to determine the amount respirable dust in your air ducts. If the levels are too high we recommend that you have your air ducts cleaned.