Ductwork that’s round, coupled with strong, affordable flanges that keep it that way. That’s WonderFlanges in a nutshell.. Manufactured by Indiana-based Midwest Metal Products, one of the nation’s ...

One I had a hand in: the first totally automatic machine for inserting both TDC and TDF corners into TDC/F flange constructed ductwork – the Cornermatic® machine. The other is the addition to the ...