I bought the heartland 21000 a long time ago and static pressure was the last thing on my mind. Now that you brought it up i can see the air turns 270 degrees before exiting the hood!
If I go by the static pressure readings on this site http://www.dryerbox.com/ratings/dryerfittingschart.htm
those don't bode well for it either.
Opinion on this hood? http://store.dryerbox.com/Premium-Fl...Vent_p_93.html
Looks pretty good? Here is an action video http://youtu.be/L65TQ70Dkcc
. Hopefully it seals tightly.
@joecaption, i stand corrected. The semi rigid aluminum is not as bad as I had thought it to be. I think i will use it for the bottom section as it will make attaching the dryer easy. I will still use rigid duct for the straight sections and probably for the top 90 degree elbow as the space is very restricted there.