CPAPtalk.com

GumbyCT wrote:I am sure that is why re$med designed their machines around 24V - so they could squeeze that last penny from their users. There is no other reason to do that.

Maybe yes, maybe no. I don't know the particulars inside the S9 but if the humidifier heater and the heated hose are fed with 24 volts then the wire size, and hence cost, is reduced. The amperage is only one half of what it would need to be for 12 volt supply. Same thing for wire size from the brick to the machine.

-tim wrote:Also car companies are starting to play with higher voltage batteries and had GM, Ford and everyone else not had massive problems, new cars would not have 12V batteries any more. Recent devices I've had come with either 5V or 24V or 48V supplies and it looks like the days of 12V is soon to be over.

In contrast to the idea that higher voltage is better are Milwaukee cordless tools. A few years ago they came out with a line of 28v power tools, so I bought a set. Well, it seems the market doesn't really want 28v tools, for who knows what reason. There is a dearth of 28v tool support from Milwaukee. In the meantime 18 volt tools seem to have become the standard across all manufacturers. Go figure.

idamtnboy wrote:Maybe yes, maybe no. I don't know the particulars inside the S9 but if the humidifier heater and the heated hose are fed with 24 volts then the wire size, and hence cost, is reduced. The amperage is only one half of what it would need to be for 12 volt supply. Same thing for wire size from the brick to the machine.

Show me the numbers... how much is saved? By wire size? lmao

So you are thinking re$med is trying to save you money when they charge $100 for a dc-DC converter? Instead of a $25 DC cord?

Doesn't pass the smell test.

idamtnboy wrote:In contrast to the idea that higher voltage is better are Milwaukee cordless tools. A few years ago they came out with a line of 28v power tools, so I bought a set. Well, it seems the market doesn't really want 28v tools, for who knows what reason.

Are you starting to see a pattern?

Done. While answering the questions thinking by myself 'yes, the S9 Autoset has it, yes it has that, yes, it does that'

GumbyCT wrote:

idamtnboy wrote:Maybe yes, maybe no. I don't know the particulars inside the S9 but if the humidifier heater and the heated hose are fed with 24 volts then the wire size, and hence cost, is reduced. The amperage is only one half of what it would need to be for 12 volt supply. Same thing for wire size from the brick to the machine.

Show me the numbers... how much is saved? By wire size? lmao

So you are thinking re$med is trying to save you money when they charge $100 for a dc-DC converter? Instead of a $25 DC cord?

Doesn't pass the smell test.

What I'm saying is that Resmed is undoubtedly trying to make the most money they can from every machine. How much, if any, money they are actively working to save the buyer, who knows. That probably is a secondary concern, especially when insurance companies are the primary payers. The enhanced profit margin is coming from manufacturing savings, coupled with the price of an adapter many will pay for. There apparently is a a feed back line from the S9 to the power brick. Even if the S9 operated on 12 volts a converter would be necessary for whatever purpose the feed back line is for. Powering the S9 is not as simple as we all would like it to be. Remember the discussions about a year ago when we were trying to come up with even a 24 volt direct connection? The third wire in the cord stymied everyone, and of course Resmed wasn't going to tell us.

Don't laugh at the idea of saving money by using smaller wire. Manufacturers will squeeze every penny they can out of a product's manufacturing cost. Now, if they can use,for example, 24 ga wire instead of 22 gauge wire in the machine by running at 24 v instead of 12 v, and can save 1 cent in manufacturing cost per machine it adds up. Ten million machines times one penny adds up to $100,000. In today's competitive market place every penny matters!

This isn't a travel issue, but I think you ought to be able to tweak the timings in the algorythms. My box decides that I'm apping out when I clearly am not, and applies a pressure pulse to kickstart me back up. But I've determined that the pulse occurs on exhale of the FOLLOWING breath - in other words, the box reads a slow breath and then blasts me while I am still breathing normally.

Also, it does this MUCH more often as the filter gets dirty. Nights I swap the filter have very low pulse counts; as it gets towards two weeks they start to climb, going from 25 or so a night to 700-900.

ekubaskie wrote:This isn't a travel issue, but I think you ought to be able to tweak the timings in the algorythms. My box decides that I'm apping out when I clearly am not, and applies a pressure pulse to kickstart me back up. But I've determined that the pulse occurs on exhale of the FOLLOWING breath - in other words, the box reads a slow breath and then blasts me while I am still breathing normally.

Also, it does this MUCH more often as the filter gets dirty. Nights I swap the filter have very low pulse counts; as it gets towards two weeks they start to climb, going from 25 or so a night to 700-900.

That can't be comfortable. I'd worry about that disturbing my sleep. I'd consult my doctor and/or get the machine checked out or try an different BiPap machine on loan?

idamtnboy wrote:

GumbyCT wrote:

idamtnboy wrote:Maybe yes, maybe no. I don't know the particulars inside the S9 but if the humidifier heater and the heated hose are fed with 24 volts then the wire size, and hence cost, is reduced. The amperage is only one half of what it would need to be for 12 volt supply. Same thing for wire size from the brick to the machine.

Show me the numbers... how much is saved? By wire size? lmao

So you are thinking re$med is trying to save you money when they charge $100 for a dc-DC converter? Instead of a $25 DC cord?

Doesn't pass the smell test.

What I'm saying is that Resmed is undoubtedly trying to make the most money they can from every machine. How much, if any, money they are actively working to save the buyer, who knows. That probably is a secondary concern, especially when insurance companies are the primary payers. The enhanced profit margin is coming from manufacturing savings, coupled with the price of an adapter many will pay for. There apparently is a a feed back line from the S9 to the power brick. Even if the S9 operated on 12 volts a converter would be necessary for whatever purpose the feed back line is for. Powering the S9 is not as simple as we all would like it to be. Remember the discussions about a year ago when we were trying to come up with even a 24 volt direct connection? The third wire in the cord stymied everyone, and of course Resmed wasn't going to tell us.

Don't laugh at the idea of saving money by using smaller wire. Manufacturers will squeeze every penny they can out of a product's manufacturing cost. Now, if they can use,for example, 24 ga wire instead of 22 gauge wire in the machine by running at 24 v instead of 12 v, and can save 1 cent in manufacturing cost per machine it adds up. Ten million machines times one penny adds up to $100,000. In today's competitive market place every penny matters!

So you are not seeing the pattern then?

Clearly I have NOT given this as much thought as you.

I think we do agree that re$med makes some darn good equipment. AND they are an extremely greedy company. Why else would they continue their proprietary designs?

GumbyCT wrote:
I think we do agree that re$med makes some darn good equipment. AND they are an extremely greedy company. Why else would they continue their proprietary designs?

And if you owned a very profitable company you would cut the selling prices down to the bone and file no patents?

Thank you everyone for answering the survey! The company reports over 150 people responded!

We will probably have these types of surveys from time to time. I appreciate your time and participation!

- Carolyn