Why VW?

[kyletstrand]

I'm just a little curious about the necessity of VW APVs. I know that VVs are very popular and I have the MVP and love it. But I haven't done much research on VW options. My reasoning for this is that VV is essentially a VW due to the fact that

Power = V^2/R.

This leads to my question: Do people use VW because it provides with a more precise power consumption than one would get from a VV?

 

[MorpheusPA]

Really, they're the same thing, VV and VW, they're just two different ways of measuring it.

V = I*R
W = V*I

Therefore, W = I*I*R, or W = I^2*R

If you know your sweet spot in wattage, setting that means the device will automatically adjust voltage to compensate for whatever resistance you're using. This is useful if you switch atty resistances often, or if your atty resistance drifts a bit over time (mine tends to rise 0.5 or so before the atty becomes unusably contaminated and tastes nasty).

Setting voltage is nice, but doesn't account for any of that. The user has to adjust voltage upwards over time (in my case) to work with the rising resistance of the atty.

All things considered, VW means you don't have to do the math in your head. But most of us don't do that anyway, our atties are all in a given range (2.4 to start for mine). If you have a wildly mixed selection of coils, say with a range of 1.8 to 3.0, your device is adjusting automatically for you and you don't have to.

 

[Thrasher]

well all the other stuff aside.
with vv you set the voltage it says at that voltage no matter what happens if the coil changes resistance from heat the vapor may seem different.
with vw the wattage will always stay the same even if the coil changes resistance from heat. to some this means a more consistent vape as no matter what happens resistance wise the atty will always get XX watts.

in the end it comes down to personal preference

 

[ShariR]

There is a pretty good discussion of the benefits of both vv and vw in this thread if you want to view more opinions on the subject.

http://www.e-cigarette-forum.com/forum/provari/501063-provari-v3.html

Enjoy!

 

[kyletstrand]

Hmmm...I kinda like the idea that VW will auto-correct for resistance change of the atty. I'm super happy with VV, but I'm sure that I will purchase something new some day, and I may give a VW a try.

 

[MorpheusPA]

Hmmm...I kinda like the idea that VW will auto-correct for resistance change of the atty. I'm super happy with VV, but I'm sure that I will purchase something new some day, and I may give a VW a try.

Most devices that do VW also do VV anyway, so even if VW isn't your thing you can always simply select VV mode instead.

We should point out that my primary device does neither. It's 3.6 volt moderated, and wattage depends solely on the atomizer. This doesn't stop me from blowing gigantic clouds with 2.4 to 2.8 ohm attys.

 

[stylezuk]

The only real advantage that i see is that sometimes the atomizer may change in resistance so if your in V/V and the atomizer drops say .4 then you are placing more voltage than usual into the coil, where as V/W will always check the resistance and so if there a change in resistance then the wattage will stay the same but the voltage applied is changed to meet the difference.

 

[hazarada]

VW is more linear when comparing the number to the actual heat produced, for example while the amount of heat produced between 3w and 6w is around double, the difference between 6v and 3v is nearly quadruple

in case you're wondering, electrically vw and vv are the same, just vw has a chip in it to calculate the amount of voltage needed for x amount of power.

 

[Jailbird]

I use all my vv/VW mods in wattage mode, because I start all of my new coils at a lower wattage and slowly ramp them up over the day.

Sent from my SAMSUNG-SM-N900A using Tapatalk

 

[Stosh]

The ultimate mod would be VT (variable taste), volts or watts are just a way of applying a number to how much heat you can expect to be produced when fired, to give you the proper flavor and vapor. I adjust for the best taste, and then look to see the numbers to be able to set it the same in the future....

I've found that even without the resistance changing, as you vape your atty will heat up and retain some residual heat changing the taste. Adjust the voltage / wattage down a click of two improves my vaping. I prefer mods that make it simple to quickly make small adjustments without 17 clicks of a single button...

 

[yzer]

I have the choice with a VV/VW mod and run VW all of the time.