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Yes, the fan is not a big issue. If it has been in a warm house and you take it outside at night it will help cool the mirror down a little quicker. It is not needed when observing, it's only purpose is to assist cooling the mirror. A cool mirror reduce tube currents that can disrupt the view a bit.
The Orion dobs are rebadged Synta ones, so would be comparable to the Skywatchers as far as optics are concerned.
Malcolm
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