Max. air flow rate
The highest speed of the air stream given out by the vacuum cleaner. The
higher this parameter, the stronger the thrust provided by the device, and the more efficiently it is able to pull or blow out debris particles from cracks and other hard-to-reach places (of course, if there is an appropriate operating mode — see above). At the same time, in most modern models, this figure exceeds 150 km/h — this is more than enough for work of small and medium complexity. Therefore, paying attention to a high flow rate makes sense only when choosing a powerful model for working in difficult conditions; we note that in the most “high-speed” vacuum cleaners, the indicators can exceed 400 km/h.
Air flow (blowing)
Performance of the garden vacuum cleaner when blowing (see "Operating mode").
This parameter determines the amount of air that the device distills through itself in a certain time. It should be noted that it depends not only on the speed of this air, but also on other parameters — for example, the diameter of the pipe. Therefore, two models with the same performance can noticeably differ in speed, and vice versa. You also need to keep in mind that the efficiency of "purging" bottlenecks with stuck debris does not depend on performance, but on the flow rate. On the other hand, good performance makes it easier to work on large areas, as allows you to simultaneously cover a large area with a jet of air.
Most modern garden vacuum cleaners in blowing mode provide up to 15 m / min;
higher rates are typical mainly for professional models.
Air flow (suction)
Performance of the garden vacuum cleaner when working on suction (see "Operating mode").
As with blowing described above, this parameter primarily characterizes how large the area covers the vacuum cleaner when working:
high performance means that the device captures more air and draws debris from a larger surface. But this indicator is weakly related to suction efficiency: the ability of a vacuum cleaner to “pull out” debris particles from cracks, thick grass, etc. depends primarily on speed characteristics, not performance.
Shoulder strap
Shoulder
strap included with garden vacuum cleaner.
This accessory is found only in models of the manual type (see above): knapsacks, by definition, are carried behind the back, and other types do not imply transportation by hand at all. When using a shoulder strap, most of the weight of the unit is transferred from the hands to the shoulder; this improves wearing comfort and makes it easier to work with the vacuum cleaner for a long time.
Support wheels
The presence of
support rollers in the design of a garden vacuum cleaner.
Support rollers are found only in manual models (see "Type"). They, usually, are located under the bell — in such a way that the unit can be put on rollers, holding the control handle, and the bell is at a certain distance from the ground. This greatly facilitates the work — instead of holding the vacuum cleaner on the weight, you can roll it on the ground without much strain on your hands.
The rollers are often made removable — so that they do not hang like a "dead weight" when working with a vacuum cleaner on weight.
Noise level
The noise level generated by the vacuum cleaner during normal operation. The lower this indicator, the more comfortable it is to work with the unit, the less the operator gets tired; and high noise levels may require the use of protection (e.g. earmuffs).
When assessing the noise level, note that the decibel used to measure this level is a non-linear quantity. Therefore, it is easiest to evaluate specific values using comparative tables. Here is one of the variants of such a table (rather simplified):
— 60 dB — sound comparable to a TV at medium volume. From this value, the indicators of modern garden vacuum cleaners begin, because. this technique works quite loudly.
— 70 dB — to a truck at a distance of about 8 m;
— 80 dB — traffic noise on a busy street;
— 90 dB — freight train noise at a distance of 8 – 10 m;
— 100 dB — the noise of the demolition hammer;
— 110 dB — indoor rock concert
Weight
The total weight of the garden vacuum cleaner. Usually, this paragraph indicates the "net" weight of the unit — with an empty dust container (or even without a dust container at all), without fuel and oil (in models with an internal combustion engine, see "Engine type"), without a battery (in the corresponding devices, also see "Engine type"), etc. This parameter is important primarily for models designed to
be carried "on oneself" — that is, hand-held and knapsack (see "Type").
