Hi Guy's ,is this fact or fiction, Do twin motor systems create too much heat between the motors, IF they are set up without the tangential discharge,or horn motors.
I have seen a lot of nutones that use the twin motor perefial dicharge motors, or not positive bypass motors. There seems to be a lot of control board failures because the heat disapation is not set up correctly.
Most all the life of the house warranteed units are single stage ametek/lamb equipped 7.2'' 3 stage blower motors. The brush life is 1200 hours. The warranty stays in effect only when the carbons are changed. I have personally repaired vac-u- flo units,cyclonic model 26's that are over 40 years old.The 334 lamb 2 stage motors,are considered the best central vac motors ever. They run at 110,110.
The nicest set up i've seen lately is the soft start ignition modules. No instant on 19500 rpm shock starts.
MOLE