Many other vacuum cleaners in the industrial market are overly complicated and hard to maintain and work with; the NVDQ570 compared to other machines on the market is very easy and simple when you open the drum to clean & remove filters & bags, it's a very quick job requiring to open two toggle clips which allows you to get into the drum from there the bags & filter are easily cleaned or disposed of. How often do the filters need changing?There are two main sets of filters on this vacuum, a primary and secondary set. The primary set consists of a cloth vacuum bag. These dust bags are disposable and designed to be filled then disposed of. The filter bags protect the secondary filters from contamination and ensure that any collected dust is easy and clean to remove. The secondary filters are readily available and easy to change when required, if you use the machine with bags then you will very rarely need to change these. Often brushing them off during each bag change is enough to provide a very long life span on these filters. Motor Power - 1060w x 2. Avern Cleaning Supplies (Internet) LTD, Unit 7 Shrub Hill Industrial Estate, Shrub Hill Road, Worcester, WR4 9EL. The item "Numatic NVDQ570-2 Twin Motor Dry Industrial Commercial Vacuum Cleaner Car Wash" is in sale since Thursday, October 8, 2020. This item is in the category "Home, Furniture & DIY\Appliances\Ironing & Vacuuming\Vacuum Cleaners". The seller is "averncleaningsupplies" and is located in Worcester. This item can be shipped to United Kingdom.