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Attic roof vent fan- brand unknown. need motor and blade

Put a new motor 3.4 amp 1050 rpm into a roof vent fan 6 years ago. Two years later, customer complained of noise so got new motor under warranty. Now, complained again. (I do not hear noise). Suspect bent blade. Unit has no marking on it. Thought it was Butler Ventamatic and was going to buy entire unit for $60 and swap motor and blade, until I discover blade is only 12". Butler Ventamatic does not make a 12" blade. No name on tstat or dome. Has metal flashing and dome, 3 stud mount. Can I take a chance and get 12" "universal" attic blade and should I use another 3.4 amp motor or get 4.3 amp? Thanks.

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Any Blade will be ok if it will fit shaft and they all should be cosistant and of course the higher the amp the better quality.I like the Pro 3 model at Home depot but I believe the Pro 1 gable is the 12 inch blade,pro 3 is 17 inch houseing and maybe 12 inch also.

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Posted on Apr 06, 2009

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