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How do I know when my ducted vacuum bag is full?

A ducted vacuum bag is much larger than a portable vacuum bag and may last a year or more in many applications. Needless to say, a huge amount of dirt and dust can be collected in the bag over that length of time.

To understand how a vacuum bag becomes full, it's important to know that the bag serves two purposes:

  1. to collect vacuumed material, and
  2. to filter the vacuumed air

So how do you know when the bag is full and needs replacing?

In most cases, you will notice a decrease in suction when your ducted vacuum bag is due to be replaced. The bag may not necessarily be completely full of vacuumed material, but the internal filter lining of the bag will be clogged with fine dust and dirt particles which causes the decrease in suction. This is a fairly common occurrence as most vacuums collect a lot more dust than they do larger objects.

Beware of fine powders:

If you vacuum a large quantity (say, more than a small handful or two) of fine powders such as plaster or concrete dust, talcum powder or flour, a vacuum bag will clog up very quickly whilst appearing to be virtually empty. In this case the internal filter lining of the vacuum bag will be full of the fine powder and the bag puffed up like a a balloon. It's critical to replace the bag immediately in theses cases as continued use may result in the bag splitting open, which can irreparably damage the vacuum motor.

Can I re-use a vacuum bag?

Paper vacuum bags are not designed to be re-used.
Even if you do manage to open up, empty and re-seal the bag; the internal filter lining will still be full of fine dust.

Why did my bag only last a few months?

The following factors all influence the lifespan of a ducted vacuum bag:
  • Size of your home
  • Frequency of vacuuming
  • Number of people and pets living in your home
  • Amount of carpet in your home
  • New carpet or rugs shedding fibres
  • Wood burning stove or open fireplace
  • Coastal/sandy home location

After 40+ years in the business, we have found the average life span of a ducted vacuum bag is anywhere between 3 and 18 months.

Changing a vacuum bag:

We recommend changing your bag around every 6 months, even if it's not completely full. This will ensure a long motor life, the best cleaning performance and reduce the chance of a bag splitting open.

If you are not sure how to change the bag, take a look at our article on How to Replace Ducted Vacuum Bags.

Paper and cloth bags for all makes and models of ducted vacuum can be ordered on our website for fast delivery Australia wide.

If you're not sure which bags you need feel free to contact us for assistance