Posted for Walter Atkinson <walter@advancedpilot.com>:

 Rick:
 
 The Turbo Cirrus that TAT is working on has a LOT of forced air heat from
bleed air while sitting on the ground at idle--enough to warm the cabin and
defrost the windshield on the ground in Duluth.
 
 (The upper deck pressure is regulated to stay at about 3" above the MP and is
not a direct feed off of the turbo outlet air.)
 
 This is outside of my area of expertise.  I'll see this installation this
coming weekend and I'll try to remember to get you some answers.
 
 Walter