Clone box need intake/exhaust?

Putting my clones(2-3)at a time into a small 15" tubberware. Running 15w leds's which is fine at this nano sized space. My question is, do I have to run passive intake, exhaust for clones/vegging up to 2 weeks? Will they not live from the same air going around?

Just vent the container or lift the lid off and air them out a couple times a day and they should be fine. Keep the light levels low for the first week so they don't put energy into vegging right away. The lower leaves should start yellowing after a bit and that usually indicates they have roots but it doesn't happen every time.

I just use a 23W CFL about 6" away from the tops at either 18 or 24 hours/day to root mine.

Thank you, what about when they start vegging? Do they need that much air if they are going into flower week 2-3?

I usually have the dome off after 5 days or so. If it's cool like around 70F then I may not have a dome on at all. Too warm and wet and they can easily get stem rot so I never use a heat mat and if they take a few days longer to root that's ok too.