The above reference to air flow, if sufficient, can offset, to a degree, a high coil temperature, however... disregarding air flow, due to the lack of a measurable, comparable value...
Vapor density and vapor temperature can be - I say
can be - selected semi-independently of one another... but you run into issues with time. Read on.
Vapor density comes from two sources (three if you count air flow... but again, measurement is currently somewhat subjective)... coil net surface area, and enough current to adequately heat that surface area.
Although most want an excess of both, you can go for a high value with the former, while maintaining a modest latter value.
If you chain vape however... heat does build up in an RDA, even though the heat flux value (coil radiant heat representative value) is relatively low.
Using
Steam Engine for our large surface area/cool temperature build example ... With a 0.25Ω, dual parallel build from 22 gauge wire will have a
substantial surface area of 222.99 mm², if you apply only 55 watts to it, the heat flux value is a cool 121 mW/mm².
The down side to this is the heat capacity (time-to-temperature value - low numbers are faster than high)... which is a slow 119.35 mJ/K. Increasing heat flux by applying more wattage will speed up heat capacity... but will obviously increase the peak temperature as well.
