How long to warm up a 10 year old Boxster?

[kk2002s]

So after a little re-think and some thought to JFP's input I timed things out before a Christmas present 2 1/2 hour drive
Timed things out
90 seconds for SAP to stop running
Approx. 3 mins for warm air to begin blowing (It was 55 degrees out)

So I have always waited till SAP stopped and a few easy 2K revs before driving
So waiting for a little warm air to blow is really not much more than my typical warmup