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I read this whole thread but am still unclear about 2 things
1. Bioweapon defense mode cannot be "fan on max and recirc on", because to pressurize the cabin, you MUST get outside air into the cabin - more outside air has to come in than gets out (through leaks or through wherever the air comes out normally) to maintain positive pressure. If you turn on recirculate and if that means no fresh air at all, there is no way the pressure inside the cabin will increase. Read the blog post Putting the Tesla HEPA Filter and Bioweapon Defense Mode to the Test too. Bioweapon mode is cleaning the air outside the car too. So, does anyone know for a fact what exactly bioweapon defense mode does (no guessing)?
In my X on V9, when I crank to 10, it switches to recirc. When I turn on Bioweapon Defense Mode, it goes to 9 and recirc is disabled. I know previous comments indicate max fan elsewhere in this thread, and I may have previously commented that wasn't what I was seeing in V8, either, but I don't remember for sure.
Beyond that, see this tweet from Elon:
Elon Musk on Twitter
So maybe recirc would turn on automatically in certain circumstances even though it is usually disabled.
The air has to be displaced to come out of the car. It is pulling outside air, cleaning it, and pumping it into the car, which forces the air in the car out (positive pressure). Eventually this means it's forcing clean air out as it continues to suck outside air in. His point was this is NOT recirc.....and nor is the rest of the car air tight. The 'demo' Tesla did was in a closed environment, the X has a massive amount of interior air volume, the 'clean' air inside the car will leak out and make it appear to 'clean' the air around it.
I assume that cars in general have air outlets to manage airflow in the cabin, they don't just pump air into the cabin hoping it will "leak" out of random door/window seals.
Bioweapon mode doesn't need to have anything to do with special with ducting, it just has to achieve positive pressure in the cabin by closing the air return and bringing air in faster than it can leak out through the door seals.
So this would imply bioweapon mode has to close the air outlets, not just crank up the fan speed... meaning simply installing a HEPA filter will not get me the equivalent of bioweapon defense mode unless I pay tesla $500
Nope, all the bio weapons button does is turn off recirculate and crank the fan to 11. The hepa filter is worth the money, but the software button is not.So this would imply bioweapon mode has to close the air outlets, not just crank up the fan speed... meaning simply installing a HEPA filter will not get me the equivalent of bioweapon defense mode unless I pay tesla $500
So this would imply bioweapon mode has to close the air outlets, not just crank up the fan speed... meaning simply installing a HEPA filter will not get me the equivalent of bioweapon defense mode unless I pay tesla $500
Sorry but how do you know this for a fact? In my post I indicated the need to close/reduce the cabin air outlets as a requirement for bioweapon defense mode to work.Nope, all the bio weapons button does is turn off recirculate and crank the fan to 11. The hepa filter is worth the money, but the software button is not.
"divert between the cabin air return and outside air" - I don't follow. Nobody yet has disagreed that recirculate means, cabin air outlets get diverted to cabin air inlets, and the fresh air inlet(s) get closed. Are you suggesting turning off recirc means the air outlets get closed? That seems unlikely.That assumes that the act of swapping from recirc to outside air doesn't do exactly that, divert between the cabin air return and outside air. All we know is there doesn't appear to be anything in the parts catalogue that indicates a hardware difference between HEPA and non HEPA vehicles.
Looks nice!OK here's a chickenscratch. Not to scale. Filters and fans not shown to avoid confusion.
Anyone who disagrees with this, comments are most welcome.
View attachment 500614
So today I purchased the HEPA filter (1045566-00-H) for $220 plus tax and installed in in my 2016 AP1 MX (without bioweapon defense mode). I took some pictures if anyone is interested. Observations:
- turns out my MX already had a HEPA filter (1045566-00-D), to my surprise. Was super dirty though.
- installation took half hour or so (on my own), no biggie.
- The air inlet at /under the front bumper has dampers, when you turn on recirc, those close. Turn off recirc, they open. This surprised me because I and others thought that the air coming into the hepa filter (located behind the frunk basket) is just coming in randomly from the area around / underneath the frunk basket, which seems open to the ... road below.
- It seems the outlet air is somehow coming back all the way to the front of the car again, so perhaps recirculated air also goes through the HEPA filter? Would be weird