Very Noisy Fan. Stays ON even after you turn oven off!

Do NOT, I repeat, Do not buy a Monogram oven. The 30" double oven we purchased (ZET958) is NOISY. That is, the fan is noisy, regardless of whether you're running "bake" or "convection bake" mode. To make matters worse even after you turn the oven off, the fan stays ON for another TWO HOURS, even if you've only used it for 15 minutes!! You are trying to relax and enjoy your meal, but you have to contend with the &%$@!!* fan noise. It's irresponsible that GE doesn't post a warning notice about the fan noise. We would not have bought it if we had been forewarned. Why the fan continues after the oven is shut off makes no sense, since it continues to stay on for two hours no matter if the oven has been on for 10 minutes or 10 hours! So much for energy-saving design!!!