Jet fan vs axial leaf blowers

Blower marketing has settled on two words — jet fan and axial — without much explanation of either. The distinction is real and it is about where the air goes inside the housing, but the published specifications show it decides the shape of the output, not how much of it there is.

The short answer

What each design actually does

• Jet fan. The impeller sits in line with the outlet and moves air along the axis of the tool. The path from intake to nozzle is short and straight, which is the design argument for a compact housing and a concentrated stream.
• Axial and centrifugal layouts. Air is thrown outward by the impeller and collected before it leaves, which gives designers more freedom over the outlet shape at the cost of a longer path.

The three, on published figures

Reading the table honestly

The one place the jet fan product genuinely stands apart is noise. RYOBI publishes 57 dB for the RY404100 against EGO's 64 dB — a 7 dB difference, which is a meaningful gap at the ear. Whether that is the fan or the housing or the motor, RYOBI does not say. Our quiet blower page works through what those figures do and do not cover.

Why the housing shape matters at all

A blower is a fan in a tube, and the only thing that distinguishes one from another at the same motor power is how efficiently it converts rotation into a directed stream. Air that has to change direction inside the housing loses energy doing it. That is the engineering argument for an in-line layout, and it is a real one.

It is also an argument that consumer specification sheets cannot settle, because the figure that would settle it — airflow per watt drawn, or airflow per watt-hour consumed — is not published by anyone. What we can do is compare the watt-hours each machine spends per minute against the air it claims, which is the nearest available proxy.

What to compare instead of fan type

• The variable range. A published span tells you what the tool does at settings you will actually use. Only EGO publishes one for both its blowers here.
• Watt-hours in the kit. RYOBI ships 320Wh across two packs, EGO 280Wh in one, Greenworks 200Wh — and the Greenworks listing we hold is tool-only.
• Weight, which nobody disputes. 5.5 lb against 9.4 lb is a fact you will feel in the first ten minutes, whatever is inside the housing.
• Published noise. 57 dB against 64 dB is the one difference in this comparison that a neighbor would notice.
• The platform. Whichever packs you already own outranks every row above — see switching platforms.

Which shape suits which debris

1. Concentrated stream for wet mats, gravel edges and anything stuck: a narrow, fast column lifts what a wide one slides over.
2. Wide, softer output for dry leaves across open lawn, where volume sweeps a broad path in one pass.
3. Either, on a middle setting, for the great majority of work — which is the real lesson of the table.

The nozzle in your hand changes the output shape more than the fan behind it. See the blower nozzles guide.

#ad Check the Ryobi 40V HP Whisper Series 730 CFM RY404100 price on Amazon — how we're funded.

#ad Check the Greenworks 80V 730 CFM Axial Blower price on Amazon — how we're funded.

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The honest verdict on the label

"Jet fan" is a useful description of a real design choice and a poor basis for a purchase. The evidence on this page is that the published output of a blower tracks the motor, the battery and the nozzle rather than the housing, and that the one machine here beating the jet fan on both airflow and air speed publishes no fan type at all.

Where it does correlate with something worth having is noise: the jet fan product is the quietest blower in our registry at a published 57 dB. Whether the geometry causes that, RYOBI does not say, and one product is not a pattern. But if a neighbor is the reason you are reading this, that figure is the one to buy on.

Everything else on the spec sheet — the variable range, the watt-hours in the kit, the weight, the platform — will tell you more about how the tool behaves than the two words on the box. Our how to choose a blower guide runs through them in order.

What we cannot tell you

We have not tested these blowers and we cannot open them. No maker publishes impeller diameter, blade count, housing geometry or a fan-type specification, so "jet fan" here is a product name rather than a documented category. The 57 dB against 64 dB noise comparison is two brands' own figures measured under conditions neither states.