why are bottom middleby ovens so loud?

I feel like the bottom ovens in my shops are 3x louder then the top

We run PS360WB ovens and when the bottom turns on the fan noise is insane. When the bottom shuts down its almost like your ears popped clear from being plugged up

Both my stores do it and I don’t understand

Any thoughts? I want edge 60wbs but I’m cheap

My bottom 360 EWB is way quieter than my top oven - you can come buy the stack in June if you want CHEAP too! I am buying a triple stack XLT 3870 to put in my new shop.

it appears that your fans are out of balance. A good service man should be able to pin point your problem.

George mills