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      11-14-2018, 09:57 AM   #26
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Drives: BMW M3 / AH3
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Quote:
Originally Posted by GuidoK View Post
The degree of filtration is set by the rated standard of the Hepa filter.
You know, that 99.97% from your link, that is a ASTM D2986 spec.
The bosch filter meets the same spec. And as for filtration capacity (litres per minute or ft³/min), I've shown you the graph where the tesla test results are compared to the 2010 mazda stock filter result. There isnt much more to the entire system. The 'System' is a filter and a fan. So there's a filtering degree (in this case ASTM D2986) and a flow rate of air, where you can see in the graph that what the tesla system does in 2min, the system in the old mazda does in 3 min. Thats it.

But I suspect you don't have a technical occupation. You're not a techie.
You dont seem to process this data the way I process it.


Thats because 'HEPA' itself is a loose claim. It doesn't say anything. HEPA is NOT a 'rating'.
It just means "High Efficiency Particulate Air", nothing more nothing less.
Thats why there are independant set specs for it (or ratings how you call it). Thats what you have to look out for. So there is the ASTM D2986 (thats a US spec; that 99.97%, the one both Musk and Bosch claim to) but for example in europe they have a much more elaborate system (EN 1822:2009) where they divide it into 8 seperate classes ranging from E10 (>85%, so much less than the US ASTM D2986 spec) to U17 (> 99.999995%, way more than the US ASTM D2986 spec). (those filters with really really high filtration degree sometimes also are called 'ULPA')

Thats how these specs work.


I never said it works as well as the Tesla feature. What the tesla feature does in 2 minutes, a normal car can apparantly do in 3 minutes. Just look at the graph.
My point is that Musk claims that that is '100 times better', and you seem to agree.
So either Musk has, with his physics degree, the mathematical insight of a 4 year old, or he is making up all kinds of numbers in order to sell his stuff and get into the media. I gave you links where specialists debunk the things he says on this, and still you seem to fall for it.
Comical

You seem to be the one without the tech knowledge. You assume all graphs show the same thing...time is the only factor.

What you fail to comprehend is the amount of filtering needed.

On a normal commute perhaps a Mazada might perform the same. But when you have the amount of particulates in the air in the middle of a massive wildlife, the situation is far different.

As anyone who changes their HVAC Filter knows, the more dust and debris in the air, the faster the filter clogs. The more the filter clogs, the less efficient the filtering. No degree needed. Only common sense.

If you think that a ~5” filter will stay unclogged as long and working as efficiently as the massive filter in the photo above that is too big to even fit in a Model 3 or Model S, you are the dreamer.

No different than how often needs to change air filters in a vehicle if you live in an urban environment or drive daily on dirt roads.

Regardless, 1st hand accounts from the California Wildfires are available on the web.

Bottom line....if stuck in a wildfire less than an hour from my house and where the air quality has been miserable for months because of multiple fires, I’d choose the Tesla option.

I’ll let you use the Mazda option which most likely is about as effective as your convertible.

Let’s see who does better.
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