<div dir="ltr">Hi Helmut,<div style>My Neato is currently vacuuming my house while I'm (somewhat productively) working. It's not perfect- I have to make sure the floor is free from bits that could get tangled in the revolving brush (socks, bras) and bits that could get lost (legos). The path from floor through the brush to the dustbin to the motor is ~5 times shorter (20cm vs 100cm) than a typical upright and straight without any bends. </div>
<div style>A year ago I attended a talk given by one of it's designers- a lot of engineering has gone into the device. Plenty of CFD analysis to make sure that the vacuum picks up things as efficiently as possible. </div>
<div style>Hanno</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Jun 26, 2013 at 9:25 PM, Helmut Walle <span dir="ltr"><<a href="mailto:helmut.walle@gmail.com" target="_blank">helmut.walle@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On 26/06/13 09:20, Hanno Sander wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I demoed my Neato VX11 robot vacuum at a meeting several months ago.<br>
The Neato uses a laser to accurately map its surroundings and then slowly vacuums each area of carpet exactly once. I (and more importantly, my wife) are extremely happy with it's performance in a house with 2 kids and a shedding dog. I bought it for $240 US to integrate into my visual programming language 12Blocks, now my wife won't let me touch it.<br>
<br>
Comparing the power requirements between two very different usages doesn't tell you much. I suggest that it takes exponentially less power to vacuum at a slower speed.<br>
<br>
I also imagine that vacuums aren't designed to be efficient- given that they're heavily marketed by how much power they use (waste).<br>
When was the last time you bought a vacuum that was advertised with a lower Watt rating than the competitor?<br>
Hanno<br>
<br>
</blockquote></div>
[...]<br>
<br>
Interesting, Hanno! And good to hear the Neato works for you! Yes, there appear to be big differences between models / manufacturers - that was my reason for mentioning the Karcher Robocleaner vs. the Dirt Devil: two quite differently targeted (and respectively priced machines). It looks like the Neato is a lot more capable than the Dirt Devil, too, and again, it costs significantly more as well. That appears to be the one certainty here: there is no free lunch to be had in the domain of cleaning robots. Also seeing that you expect this kind of product to last for years, I dare say that there may just be some connection between longevity / quality and price. (Always keeping in mind that while rock-bottom low prices can be a guarantee of lack of quality in some markets, a much higher price by no means is a guarantee of good quality...)<br>
<br>
Regarding the vacuums' suction efficiency: I am not an expert on this in any way, but there probably are some conflicting requirements, e.g., if you want a long flexible hose connecting the machine to the cleaning head, then both the length and the flexibility of the hose eat up a lot of your suction power. As you are pointing out, what matters for the cleaning is the suction at the head, and this is actually specified by Nilfisk.<br>
<br>
And yes, from my experience there are some interesting non-linearities around vacuum cleaning. For example, the hair from these wigs sometimes got engaged with the carpet fibres so closely that any number of slow passes with the strongest vacuum cleaners would not get it out of the carpet, however simple brushing with a firm bristle brush would easily "comb" the hair out of the carpet. Sometimes it's technique, not power or duration. And that also is my main criticism of the Dirt Devil: it is meant to be a hard floor cleaner, but can it wipe the floor wet? If it can't it's never going to be as good as something that can, because you simply cannot brush and suck spilled coffee off the tiles... And then there are machines that can wipe the floor autonomously, possibly there even is a model made by Dirt Devil...<br>
<br>
Kind regards,<br>
<br>
Helmut.<div class="HOEnZb"><div class="h5"><br>
<br>
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