Questions about filters for DreamStation Auto CPAP

palerider · Post by **palerider** » Wed Apr 15, 2020 10:34 am

Chris8243 wrote: ↑
Wed Apr 15, 2020 7:23 am
The filters are for the air going in that will come out of the hose - not for the benefit of the machine ( as you stated "a dirty filter causes the machine to operate hotter."). No, it's for your benefit, not the machines.

No, the OP is perfectly correct, the filter is for the benefit of the machine, so that the fan inside doesn't end up looking like this:

zonker · Post by **zonker** » Wed Apr 15, 2020 10:36 am

palerider wrote: ↑
Wed Apr 15, 2020 10:34 am

Chris8243 wrote: ↑
Wed Apr 15, 2020 7:23 am
The filters are for the air going in that will come out of the hose - not for the benefit of the machine ( as you stated "a dirty filter causes the machine to operate hotter."). No, it's for your benefit, not the machines.
No, the OP is perfectly correct, the filter is for the benefit of the machine, so that the fan inside doesn't end up looking like this:

YEESH!!

<runs down hall to check filter>

palerider · Post by **palerider** » Wed Apr 15, 2020 10:48 am

just to be 'clear', having the filter in place is what prevents that. as the filter gets more and more 'full', it'll resist airflow more, which will, eventually, end up causing the motor to be pulling more and more of a vacuum on the back side of the filter which, strangely enough, results in *lower* load on the motor, since it's not able to move as much air.

This is why, in professional installations, they monitor when filters need to be changed by measuring the load on the blower motors, and when the load *drops*, they know the filters need to be changed.

"clear" referring to "clean"...

Janknitz · Post by **Janknitz** » Wed Apr 15, 2020 3:58 pm

I love not having DME coverage (really!) because I don't have to deal with DME's. I buy a pack of 52 filters for my ResMed Machine for about $12. Theoretically

I could change filters weekly. If I could just remember where the heck I put them when I rearranged the bathroom cabinet.

Chris8243 · Post by **Chris8243** » Wed Apr 15, 2020 5:04 pm

palerider wrote: ↑
Wed Apr 15, 2020 10:34 am

Chris8243 wrote: ↑
Wed Apr 15, 2020 7:23 am
The filters are for the air going in that will come out of the hose - not for the benefit of the machine ( as you stated "a dirty filter causes the machine to operate hotter."). No, it's for your benefit, not the machines.
No, the OP is perfectly correct, the filter is for the benefit of the machine, so that the fan inside doesn't end up looking like this:

Oh my. Thank you for correcting me!

zonker · Post by **zonker** » Wed Apr 15, 2020 5:10 pm

Janknitz wrote: ↑
Wed Apr 15, 2020 3:58 pm
I love not having DME coverage (really!) because I don't have to deal with DME's. I buy a pack of 52 filters for my ResMed Machine for about $12. Theoretically I could change filters weekly. If I could just remember where the heck I put them when I rearranged the bathroom cabinet.

yup, same here. i'm privileged enough and cheap enough) that buying out of pocket isn't a hassle at all.

btw, i have a cheapie little wooden box with pull out drawers where i stash all my cpap stuff other than my backup machine.

Okie bipap · Post by **Okie bipap** » Thu Apr 16, 2020 10:44 am

zonker wrote: ↑
Wed Apr 15, 2020 5:10 pm
btw, i have a cheapie little wooden box with pull out drawers where i stash all my cpap stuff other than my backup machine.

The spare masks, cushions and head gear are stored in the top drawer of my dresser. The travel bags and spare machines are stored in the bottom of my wife's cpap nightstand and the distilled water and spare filters are stored in my nightstand.

zonker · Post by **zonker** » Thu Apr 16, 2020 11:17 am

Okie bipap wrote: ↑
Thu Apr 16, 2020 10:44 am

zonker wrote: ↑
Wed Apr 15, 2020 5:10 pm
btw, i have a cheapie little wooden box with pull out drawers where i stash all my cpap stuff other than my backup machine.
The spare masks, cushions and head gear are stored in the top drawer of my dresser. The travel bags and spare machines are stored in the bottom of my wife's cpap nightstand and the distilled water and spare filters are stored in my nightstand.

yeah, i think it's best to have this stuff where you can find it in the middle of the night and FAST!

Justwannasleep1 · Post by **Justwannasleep1** » Thu Apr 16, 2020 2:40 pm

Where can the originals be bought? Eventually rinsing doesn't work.

Justwannasleep1 · Post by **Justwannasleep1** » Thu Apr 16, 2020 2:41 pm

palerider wrote: ↑
Wed Apr 15, 2020 10:48 am
just to be 'clear', having the filter in place is what prevents that. as the filter gets more and more 'full', it'll resist airflow more, which will, eventually, end up causing the motor to be pulling more and more of a vacuum on the back side of the filter which, strangely enough, results in *lower* load on the motor, since it's not able to move as much air.

This is why, in professional installations, they monitor when filters need to be changed by measuring the load on the blower motors, and when the load *drops*, they know the filters need to be changed.

"clear" referring to "clean"...

Is it possible for a dirty filter to cause the CPAP to need higher pressure to maintain the same function to the user?

palerider · Post by **palerider** » Thu Apr 16, 2020 4:19 pm

Justwannasleep1 wrote: ↑
Thu Apr 16, 2020 2:41 pm
Is it possible for a dirty filter to cause the CPAP to need higher pressure to maintain the same function to the user?

NO.
The air to create that pressure has to come *through* the filter. The dirty filter will cause the machine to have to work harder to create the same pressure.

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