Laboratory operators know that a laminar flow hood is instrumental in creating a sterile environment for working with sensitive materials, such as biological samples, chemicals, or electronics. For the budget-conscious, a used laminar flow hood can be a cost-effective option for laboratories, but like other lab equipment, it too requires some attention to ensure its optimal performance, safety, and hygiene.
Why is it important to maintain and clean a used laminar flow hood?
When sourced from a trusted vendor, a used fume hood may seamlessly integrate into any lab environment. Because they may have accumulated dust, dirt, grease, or contaminants over time, trusted sellers and distributors often completely clean and maintain these devices prior to offering them for sale. Vendors ensure they address all issues which can affect its functionality and quality.
However, over time, as with other critical lab infrastructure, if not properly maintained and cleaned, a used laminar flow hood can:
- Reduce the efficiency and effectiveness of the filter, resulting in lower air quality and higher risk of contamination.
- Cause damage or wear to the fan, motor, or other components, resulting in reduced airflow, increased noise, or malfunction.
- Pose a health or safety hazard to the user or the environment, such as spreading pathogens, allergens, or toxins.
Therefore, it is essential to regularly inspect, maintain, and clean all new and used flow hoods. This ensures their optimal performance, safety, and hygiene.
How to maintain and clean a used laminar flow hood?
The frequency and method of maintenance and cleaning of a used laminar hoods may vary depending on the type, model, usage, and condition of the device. Some general steps to follow are:
- Before operating a used laminar flow hood, verify the filter status and airflow. Ensure the filter functions correctly at an air velocity of 0.3 to 0.5 meters per second.
- After use, wipe down the work surface and the interior walls with a disinfectant solution (such as 70% ethanol or bleach) and a lint-free cloth or paper towel.
- Weekly, or more frequently if needed, clean the exterior of the laminar flow hood with a mild detergent solution and a soft cloth or sponge.
- Regularly replace or clean the pre-filter in a laminar flow hood to capture large particles and prolong the main filter’s lifespan.
- Replace or clean the HEPA filter in the laminar flow hood every six months. It removes 99.97% of particles larger than 0.3 microns. Follow manufacturer’s instructions or seek professional help.
- Annually, or more frequently if needed, inspect and lubricate the fan, motor, bearings, belts, and other moving parts of the laminar flow hood. To do this, follow the manufacturer’s instructions or consult a professional service.
To prevent clogs, replace or clean the pre-filter and the main filter regularly according to the manufacturer’s recommendations or the filter status indicator. Avoid operating the used fume hood in dusty, dirty, greasy, or humid environments.
Food for Thought
A used laminar flow hood is an invaluable asset for laboratories working with sensitive materials. At LEI Sales, we offer a wide range of such equipment. By following the steps and procedures discussed in this blog post, you can keep your used laminar flow hood in good condition and avoid common problems and issues.
