Currently Available on eBay
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 Genuine DYSON AM04 HOT FAN HEATER Portable Bladeless Air Multiplier™ Technology  £251.49
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 Dyson AM04 Dyson HOT™ Fan Heater Portable Bladeless Air Multiplier™ Technology £269.99
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 NEW DYSON AM02 BLADELESS AIR MULTIPLIER TOWER FAN SILVER + remote control NIB !! £263.85
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 Dyson HOT AM04 Portable Bladeless Fan Heater with Air Multiplier Technology NEW £269.00
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 Dyson AM03 Bladeless Pedestal Fan, New and in stock £289.98
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 GENUINE DYSON AM04 HOT FAN PORTABLE HEATER BLADELESS AIR MULTIPLIER ™ TECHNOLOGY £251.99
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 Dyson AM04 AMO4 Hot ™ Air Multiplier Fan Heater Portable Bladeless + Remote £225.00
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 DYSON AM01 AIR MULTIPLIER -- IT'S A 10" BLADELESS FAN! £131.30
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 NEW Dyson Bladeless air multiplier AM02 Silver cool safe space room tower fan £263.85
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 Dyson AM01 Air Multiplier 10” Bladeless Table Fan. White £97.37
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 Dyson AM01 Air Multiplier 10" Bladeless Table Fan White £106.77
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 New Factory Sealed Dyson am01 12" Air Fan Bladeless Child & Pet Proof Global Sh £150.76
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 Dyson AM04 AMO4 Hot ™ Air Multiplier Fan Heater Portable Bladeless £199.99
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 DYSON AM01 BLADELESS WHITE AND SILVER DESK FAN - 10 INCH £199.99
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 Genuine DYSON AM02 Air Multiplier Bladeless TOWER FAN £278.00
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 Dyson AM04 Blade-less Fan Heater £250.99
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 Dyson Air Multiplier AM01 Table Fan 12" Bladeless Fan Silver BRAND NEW £141.35
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 16" Bladeless Floor Fan - Just as Good as Dyson !! £111.82
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16" Bladeless Floor Fan - Just as Good as Dyson !! £111.82
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16" Bladeless Floor Fan - Just as Good as Dyson !! £111.82
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 Dyson AM02 Tower Fan Air Multiplier Bladeless £284.89
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 Dyson AM03 Bladeless Pedestal Fan Air Multiplier Wh/Sil £284.89
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 Dyson AM03 Bladeless Pedestal Portable Cooling Fan Air Multiplier Technology NEW £299.00
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And a selection of products from Amazon
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Dyson AM02 Tower Fan - Air Multiplier Bladeless (Silver/Silver)
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Dyson AM04 Hot Fan Heater with Air Multiplier Technology
List Price: |
DescriptionThe Dyson Hot fan heater uses Air Multiplier technology for long range heat projection to heat the room evenly. There are no fast-spinning blades or visible heating elements, so its easy to clean. Theres also an automatic cut out that switches off the unit if its tipped over |
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Dyson Air Multiplier AM01 10 Inch Desk Fan (White/Silver)
List Price: |
DescriptionDyson Air Multiplier 10" Desk Fan 3kg |
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12" (30cm) Bladeless Table Fan / Air Multiplier Glossy White / Silver finish 12v / Mains Operation with Ambient lamps
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DescriptionThis Bladeless fan featues an airfoil to multiply the air up to 18 times creating constant cool airflow without the buffeting associated with conventional fans |
Is there a theoretical size limit for air multiplier bladeless fans ?
Like Dyson fans but I'm thinking football field size.
Nope.
Dyson did not invent the air amplifier; they have been commercially available for decades, from Vortec, then from Exair.
see http://www.exair.com/en-US/Primary%20Navigation/Products/Air%20Amplifiers/Pages/Air%20Amplifiers%20How%20they%20work.aspx
You could use straight sections of air knives to make a circumference of a really big circle.
See http://www.exair.com/en-US/Primary%20Navigation/Products/Air%20Knives/Pages/How%20the%20Super%20Air%20Knife%20Works.aspx
Wikipedia has a pretty good article on air knives and on the Coanda effect.
For a really unexpected product see
http://www.exair.com/en-US/Primary%20Navigation/Products/Vortex%20Tubes%20and%20Spot%20Cooling/Vortex%20Tubes/Pages/How%20a%20Vortex%20Tube%20Works.aspx
I have used one myself.
They are less efficient than standard refrigeration or air conditioning.
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