In a message dated 98-03-17 23:56:47 EST, TStone8359@AOL.COM writes:

<< Found a BA6 gas heater in a '78 van and bought it.  I have heard praises
sung
 about BN4s, but nothing about the BA6.  Are they essentially the same?
Anyone
 have any documentation on the BA6?
  >>

both made by Eberspacher.
the BN4 was the earlier style, mostly used up till '74, located in the left
side of the engine compartment of the bus. it looked like a "torpedo".

the BA6 was the flat ovalish "muffler" looking gas heater mounted under the
center floor of the bus/van, inline w/ the main heater duct from htr boxes to
front. this was used from '75 to '83 (approx)

the BA6 is a great heater when properly maintained. it puts out nearly 50,000
BTU, alot more than the BN4.

chris