Accucraft/Aster Battery Powered Draft Fan G gauge Live Steam (2 Versions)
AP28-200 Single Speed Draft Fan
Good for small-medium size Gauge One locomotive that are alcohol and butane ceramic fired.
2 AA Batteries - not included.  
AP28-201 Variable Speed Draft Fan
Variable Speed Control
Strong max. fan speed 
Good for alcohol, ceramic and coal fired Gauge One locomotives
4 AA Batteries, Not included
 
Note: Variable speed fan is out of stock