im looking to find if there are any options for me in alternate blower motors for my stove due to bearing issues with the current fasco. on grainger.com i found this dayton blower. it is a a psc style blower instead of a shaded pole. i read on fascos web site that the psc is a better blower and runs half the amperage so it can run cooler. also read that is is ok to repalace a shaded pole wtih a psc style due to goin with a lower amperage. here is the linke http://www.grainger.com/Grainger/DAYTON-PSC-Blower-1TDP5 everything looks the same as my blower for specs. but if you click on compliance and restrictions is says cannot be used with speed controls.. why is this?