Numatic Hepaflo vacuum cleaner bag
A Hepaflo vacuum cleaner bag has a filtration efficiency far superior to a double-walled paper bag, especially for dust particles smaller than 1 micron. As a reminder, the critical particle size is between 0.1 and 1 micron.
Paper bag
A paper bag has a filtration capacity of 15% for particles of 0.3 microns. This means that out of 10,000 particles of 0.3 microns, only 1,500 particles will be stopped.
The Hepaflo bag, on the other hand, has a filtration capacity of 80% for particles of 0.3 microns. This means that out of 10,000 particles of 0.3 microns, 8,000 will be stopped.
Which bag do I need for my Numatic vacuum cleaner?
To then choose which bag volume to choose (which reference), you must first check the tank volume of your Numatic vacuum cleaner model.
9-litre tank = Reference 604015 and 905717 (Henry, Hetty, Harry, Georges, RSB, RSV, Nupro, DBQ250, SSV250 range, etc.)
15-litre tank = Reference 604016 and 905519 (NVQ370, NVQ380, WV370, AVQ380, PSP370, PPT390...etc)
25-liter tank = Reference 604017
27-litre tank, 470 series = Reference 604018
40-litre tank, 780/900 series = Reference 604019
Paper bag or Hepaflo microfiber bag: which to choose?
Paper bags remain the most economical option but saturate more quickly and filter less finely (15 to 30 microns). The Numatic Hepaflo microfiber bag filters down to 0.3 microns with 4 layers and has a capacity 2 to 3 times greater than an equivalent paper bag. For intensive commercial use (offices, hotels, public buildings), the Hepaflo is currently the most cost-effective option per liter vacuumed.
Compatibility by brand and model
Numatic (Henry, Hetty, NVR, NVH, NQS, RSV backpack): NVM paper or Hepaflo bags depending on the generation. Nilfisk Alto (GD930, GM 80, VP300, Saltix): paper or microfiber bags. Taski (Bora, Aero, Vento, Vacumat): dedicated models. Karcher (T7, T10, T15): original and compatible bags. Each product page lists the supported vacuum cleaner models.
Class H bag for asbestos removal and hazardous dust
Asbestos removal or hazardous dust removal operations require the use of a Class H bag (filtration > 99.995% at 0.3 µm) with a certified Class H vacuum cleaner. These bags can be sealed after use for disposal through an approved channel. See our dedicated collection /asbestos-vacuum-bag-class-h-atex.
Periodicity and signs of saturation
A bag should be changed when it reaches two-thirds of its capacity, not until it overflows: once it reaches 70%, the airflow drops sharply, the motor's suction increases, and energy consumption rises. For a typical commercial vacuum cleaner, expect to change the bag every 2 to 4 weeks with daily use.
Compatible or original: which choice depends on your fleet
For vacuum cleaners under manufacturer's warranty or recent models, use original parts. For a fleet of vacuum cleaners undergoing routine maintenance, compatible bags offer the same filtration and 25 to 30% savings. All our compatible bags undergo filtration tests equivalent to original equipment manufacturer (OEM) part numbers.