Ohm Coil Wattage Ratings

[Kody Kuhns]

So I am really confused about how the Wattage rating on coils work. I would think that all coils rated at 0.3ohm's would have the same recommended wattage but that doesn't seem to be true at all. I understand the rating on the coils is just a suggestion, but the wattage listed is Completely Different.

Uwell Crown II - 0.25ohm rated 60w-80w

eLeaf EC Coil - 0.3ohm rated 30-80w

Uwell Crown II - 0.8ohm rated 35-50w


Why is a 0.8ohm coil rated at a higher minimum wattage than a 0.3ohm coil???

Why is the minimum wattage of the 0.25ohm coil 60w+..... but the 0.3ohm coil is 30w+???? (1/2 as much)


How can two coils with basically the same ohm's be so different????

 

[DingerCPA]

Welcone @Kody Kuhns.

The "rated" wattages are merely suggestions. ALWAYS find your own "sweet spot."

The 0.8Ω coil being rated "higher" is just a "recommendation" at the LOW end of the coil.

Ohms Law - V = I * R (Voltage = Current * Resistance). Watts Law - W = I^2 * R (Watts = Current^2 * Resistance)

I just always recommend, start the coil LOWER than the lowest rating (to help prime it) and work your way up to where it's GOOD FOR YOU.

With the Crown and the EC coils, you also have to deal with the type of material with which the coil is made. The Uwell coils are Stainless Steel, and the EC coils are either Kanthal or NiChrome. The metal with which they are made have different properties. They handle heat differently.

Don't go by the coil ratings - might work for you - might not.

ETA - I have a device where I have dual coils that ring in just over 1Ω; I have another topper with a single coil that rings in just under 1Ω. The reading just over 1Ω, I can run at almost 30W. The coil just under 1Ω, I'm running under 20W.

 

[Imfallen_Angel]

If you're talking about cartridges it's simple.

OHMs are not the only part in any coil/cartridges.

The metal used, the size of the coil, and some cartridges have multiple coils inside.

You can have a huge coil with lots of wire in one metal, another tiny coil made in a different metal, they could be clapton type coils (multiple wires twisted together), the wire can be of different gauge, there could be 2-3 and many more coils in a single cartridge, and they will ALL be the same OHM range (or very close )

Wattage is needed as according to the metal mass, which depends on all these factors.

 

[DingerCPA]

^^^^^ This

 

[Eskie]

Or in a more cynical view, factory coils are almost always "overrated" on W as big numbers sell. People buy the bigger, faster stuff. Just look at computer chip clock ratings or a car engines hp.

My suggestion is this. Look at the bottom "rated" number. Prime your coil well and start out maybe 1/3 to 1/2 that low wattage. Yes, I know, you'll probably get no vape. That's OK, because you're breaking in the coil slowly and will avoid scorching or a dreaded dry hit. Work your way up a few W at a time with powered draws. Stop when you reach your sweet spot. There's a good chance it will be below that bottom recommended rating, or somewhere in that range on the low side.

 

[tj99959]

My way of looking at it:
There will always be those that thump their chest and say I run my 0.3 ohm coil at XXX watts, while others say that they get a satisfying vape at xx watts.

I always laugh when someone wants to know "how high" they can run a coil. because the actual reason for VV, VW, or TC is to have the ability to turn the power DOWN.

 

[Asbestos4004]

Just an observation.... Generally the guy who posts the "how high can I run this coil" thread follows up relatively quickly with a "why don't my coils last?" thread...

 

[zoiDman]

So I am really confused about how the Wattage rating on coils work. I would think that all coils rated at 0.3ohm's would have the same recommended wattage but that doesn't seem to be true at all. I understand the rating on the coils is just a suggestion, but the wattage listed is Completely Different.

...
How can two coils with basically the same ohm's be so different????

You have to Keep in Mind that these Wattage Ratings is really just Marketing. And, unfortunately, this Marketing geared towards more Inexperienced Vaper's.

An OEM may use an Upper Wattage that they think will Attract the Largest segment of Vaper's.

The Maximum Wattage a Coil Head can handle, for any giver User, is going to depend on Many Things. Like...

How well does the e-Liquid Wick?
How much Air Flow does the User use?
How Heavily Flavored/Sweetened is the e-Liquid?
Does the User Back-2-Back or Chain Vape?
The Hit Flavor a person is looking for?
etc.

Take these Wattage Ratings with a Grain of Salt. And Understand that the Coil Head OEM doesn't know Exactly how you are going to use the Coil Head. Or the type of Hit that You like the Best.

 

[pfaber11]

I'm currently running a 0.15 ohm coil rated at 50 to 260 watts I'm using it at 90 watts and its a cool vape with plenty if vapour. I've had the same coil in since the first of march and taken over 8000 puffs. I have cleaned it a couple of times by rinsing it under a tap. Didn't bother drying it out put it straight back in the tank and after about 10 dl vapes it was producing again.