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Unread 08-14-2012, 01:56 AM   #50
dave2012bbq
Got Wood.
 
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If the fan is always running, very slow to maintain the temperature, the risk of flashback or backdraft should be reduced, but I'm not a pyro expert. Even pyro experts make mistakes (e.g., prior US requirement for fan on flour silo to reduce explosions). It seem like the main risk is when a sealed container is opened and introduces air to super heated fuel (like on a Kamado). Possible turning on the fan to have a controlled burn of the gases for a few minutes, turn off the fan and open the door. I think only time and experience will tell. The kamado is thousands of years old and we still finding things out today.
I think Pellet's fan is a brushless DC computer blower. So sparks from the fan should be minimal from static or friction. A fixed steel screens can be added to less the chances of a spark from the fan to ignite the gases in the firepot.

Is the reverse flow for Pellet's firepot is the air flow goes down instead of up?
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