Curious, has anyone done a test or compared one of the Singer or Kenmore Twin Fans vs Kirby? I remember as a kid in the 80s my mother had a BOL Singer twin fan upright, and it absolutely left her Mom and Sister's matching blue and white Eureka Uprights in the dust... That thing had way better performance than either of the Eurekas, or my great aunts Hoover Convertible, *cowers* I just cant remember how it compared to my other grandmother and aunt's Kirbys.....
Mike & I found a Twin Fan at a thrift store. I think it was a Kenmore, but I can't swear to that. We've been trying to get back there to get it, but haven't been able to yet. We're not even sure if it works.