Dust extractor buying guide
Didier, Technical manager, Cardiff8 guides
- Suction power
- Power consumption
- Tank capacity
Choosing a dust extractor to suit your needs
DIY tasks and small workshops
Need to extract fine dust particles and rubble? Would wet cleaning be a bonus? Go for a dust extractor with a suction power of 12 to 19 kPa, a tank capacity of 15 to 20 litres and a power rating of 700 to 1,200 W.
If you are looking for a lightweight machine, go for a model with a plastic tank; otherwise, a stainless steel tank will offer greater durability.
Don't forget to add on vacuum attachments for different surfaces. At the least, you'll need a brush head, flat nozzle and extension wand.
A power take-off socket will be a definite plus if you plan on using your machine alongside tools such as circular saws.
Looking for a dust extractor to use in your workshop on a regular basis? You'll need a stronger and more powerful machine. Go for a power rating of around 1,400 W with suction of 19 to 23 kPa. A stainless steel tank is recommended.
These more powerful machines will be able to handle more specific tasks such as extracting chips or ash, if required.
On-site dust extractors must be quick and efficient. A thorough and powerful machine is therefore necessary. You will need a stainless steel tank. Furthermore, it is recommended that you choose a power rating of 1,600 to 1,800 W and a suction power of 19 to 25 kPa. Be sure to choose a long hose of around 8 to 11 metres or you'll often find it won't reach quite far enough!
It's also worth considering a range of modern features such as automatic filter cleaning, a wet vacuuming water-level sensor, a fan blower and a power take-off socket. The controls of your dust extractor should be located on the handle.
For more intensive use, choose a quieter model for better working conditions on sites where noise resonates.
A dust extractor with a rotating brush head that sweeps and extracts debris at the same time is a good idea for industrial use or use in large commercial buildings. Consider dust extractors starting at 1,600 W with an air flow rate of at least 300 litres per minute and suction of 20 kPA minimum.
These machines are pushed like a lawnmower and can be corded or battery-operated.
Dust extractors: how do they work?
Dust extractors are very handy machines that allow you to extract dust-filled air and other light debris and store it in a tank that may or may not contain a bag. The suction effect is produced by a motor which spins a fan to create a vacuum.
This negative pressure pulls in air and small particles through the vacuum head and hose. The particles are then deposited into the tank or bag while the warm air is vented out through an exhaust port.
Bagged vs. bagless vacuum cleaners
In bagged dust extractors or vacuum cleaners, the negative pressure generated by the fan passes through a porous bag.
These bags let in a lot of air when new. However, the pores become clogged after several uses which reduces the suction power as the air cannot pass through as easily.
On the other hand, bagless dust extractors do not have ths issue meaning they do not lose suction in the same way.
Dust extractor components
- A motor which generates suction - power varies between models;
- A tank - of varying volume and with or without bag;
- Filters - to provide protection for the motor;
- A suction head - rectangular or triangular;
- A flexible hose of variable length;
- Interchangeable extension wands - usually two, made of metal or plastic;
- Brushes and nozzles (rectangular or triangular brishes, round or rectangular nozzles);
- Wheels (two, four or five depending on model).
The main features of a dust extractor
- Power consumption (in Watts) corresponds to energy consumption. A high-power vacuum cleaner isn't necessarily the best, but power consumption is linked to some other important characteristics;
- Air flow in L/min (litres per minute) is the volume of air that your vacuum cleaner will take in;
- Vacuum pressure is measured in kPa (kilo-Pascals) and this corresponds to your suction power; the higher it is, the more your vacuum will extract;
- The size of the filter is given in cm2. A greater surface area and higher filter quality will give you cleaner expelled air;
- Tank capacity is measured in l (litres), and will depend on frequency and type of use;
- Weight in kg (kilograms); this is important if you have to carry your appliance around;
- Noise level in dB (decibels); for comfort of use - if you're a frequent user or have sensitive hearing, you may need ear protectors;
- The length of the hose and power cord will determine your range of movement; thankfully, you can get extensions;
- Battery voltage and amperage will determine the machine's power and duration of use.
Dust extractor accessories
- Brush heads - rectangular or triangular;
- Flat nozzles - for precise dust extraction;
- Wet and dry nozzles;
- A vacuum foot - for flat surfaces;
- Extension wands;
- A curved extension wands;
- Variable-length hoses;
- Accessory holder.
Advantages of a dust extractor
Whether you're cleaning the garage, the car, the workshop or clearing up the house after a messy DIY session, cleaning is a chore everyone would rather do without – but it's unavoidable!
First of all, ask yourself what type of debris you want to vacuum:
- Fine dust on the floor, to clean up after a plaster sanding session;
- Light dust in the air, to avoid breathing in dust from tools like circular saws;
- Liquid on the floor, from washing machine leaks and other accidents;
- Woodchips, to avoid having to sweep up after using your planer, go for a chip extractor;
- Rubble, after clearing the bulk of the debris from demolition work, use a dust extractor to avoid lifting any dust.
Whilst some dust extractors and vacuum cleaners are desgined for very specific purposes (such as chip extractors or ash vacuum cleaners) other models are very versatile and can extract both water and dust particles with ease.
Dust extractors: bag or no bag?
Bagged dust extractors: pros and cons
Vacuum cleaner bags offer better dust filtration. They can be made from synthetic materials, which offer better more efficient filtration and durability, or paper, which is a cheaper but lower quality option.
The idea of the bag is to securely contain the waste, which is important if you are allergic to dust or dust mites.
The disadvantage of these bags is the cost they entail and the loss of suction force as the bag wears.
Bagless dust extractors: pros and cons
The advantage of bagless dust extractors, however, is that they are more cost-effective and don't generally experience loss of suction over time.
Add-on features for dust extractors
Power take-off socket
Rotating brush head
Using a dust extractor to clean your car
For lack of a better option, household vacuum cleaners are often used to clean cars. However, the level of dust plus the presence of gravel and other bits of rubbish usually found in cars puts your appliance at risk.
What's more, the thickness and density of car floor mats means you'll need a higher suction power than usual to get them clean. Car seats also require a stronger machine to tackle crumbs dropped in between seams, etc.
Choosing a cleaner for your carIn order to choose the right machine to clean your car, we advise you look for the following specifications as a minimum:
- bagless models;
- 1,400 W;
- 23 kPA;
- flat nozzles, extension wands and suction brushes;
- a long hose for vacuuming seats, parcel shelf and boot.
Final tips for choosing the right dust extractor
Your choice of dust extractor will come down to finding the right mix of technical specifications and features. Choosing the right materials is also very important.
Didier, Technical manager, Cardiff 8 guides écrits
I've spent 10 years working in maintenance services, first as a Technician and then as a Head Technician, and eight years perfecting my subcontracting methods and management. Today, I get to be both a project manager and a technical jack of all trades.
DIY: I love it. I like having the right tools. Precise work on wood and metal is my passion - if it doesn't exist, just hand me the tool and I'll make it myself! In my daughter's bedroom, for example, I made an integrated unit which fits both her bed and desk for homework. And apparently word has gotten around: even the neighbours knock on my door when they need some DIY advice and support.
With my experience in home renovation and my knowledge of the various building trades, I'm always happy to help you pick the right tool or equipment.
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