What is the secret to achieving optimum performance from a vacuum? Maintenance, maintenance, maintenance! Nilfisk vacuums are known for their superior operation due to their multi stage filtering capabilities. Filters are one of the most vital areas of a vacuum, often neglected and forgotten. Regular filter maintenance and scheduled replacements are an important part of maintaining the best possible operation of vacuum cleaners.
The following filter changes are suggested times under normal, intermittent usage, not continuous operations:
- Paper bags: if used, are to be changed when the bag is about 2/3 to 3/4 full.
- Main filter (cotton or polyester): should be changed every three – five years. These filters can be washed a few times (if necessary) using a mild detergent, such as Woolite® and AIR-DRIED only. Tumble drying will cause too much shrinkage.
- Microfilter: change at least every three months
- HEPA (High Efficiency Particulate Air) or ULPA (Ultra Low Penetration Air): at least once a year commercially; 3-5 years for household use.
Every application is different and can therefore affect filter life; monitoring of filters over time will dictate if the above schedule needs to be modified.
Using genuine, clean Nilfisk filters allow the motor to run efficiently and extend its useful life considerably. Excessive obstructions (or any restrictions of the airflow) will cause low suction, overheating, and premature wear of the motor. Remember, that often times the working air stream is also the cooling airflow for the motor. Larger vacuums will have pressure relief valves, which will protect against flow restrictions by providing a secondary option for adequate airflow to reach the motor.
Check out these videos on DIY filter changes on the iconic Nilfisk GM80.
This post is written by the Nilfisk-Advance, Industrial Vacuum Division Technical Department.