In Reply to: Opinions on E34 ventilation posted by BMHJ on September 13, 1999 at 15:48:09:
I currently have both an E28 & E34 and there are tremendous differences in the two systems. The E 28 appears to have a much more powerful AC blowing much lower temps at the vents. (38-45 degrees) It is silver vs black and that is a contributing factor to how much the ac seems to have to overcome on a hot day. (The interiors are burgundy and parchment respectively.) However, the venting system seems to ignore the footwell area, and the tranny puts quite a bit of heat into the cabin. My mechanic assures me that all the heat shields are in place, and the "mono-valve" has been rebiult so that all vents direct correctly and don't allow free flow. With the E 28, it is easier and more obvious to get fresh air into the cabin. One lever, and gobs of air jump in at whatever the ambient temp is at the time. The E34 does not seem to flow so freely and air entering through the window is at a different temp than through the venting system. Overall, the E34 is much more refined and seems to be more comfortable than the E 28. The blowers seems quite comparable in terms of volume per setting. (ie: 1,2,3,4 etc.) This is a bit long-winded and free flowing, but I hope it helps. E-mail me if you have more specific questions.