Expected Recovery Time In Bvv Passive Apollo 1lb Closed Loop?

The only stage I don't have a firm understanding of is how long I should expect the recovery of solvent to be. I understand temps play a factor so let's say this:

1. how long should I expect the recovery to take on 6lb of N-Butane using ice water and warm water?
2. how long should I expect the recovery to take on 6lb of N-Butane using dry ice and a warm water bath?

I understand a passive systems bottleneck is going to be recovery time, but I'm not sure if it's safe to expect it to be 1 hour or 5 hours or if using dry ice vs ice water will save me hours or just minutes.
 
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