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Author Topic: Sizing vents  (Read 443 times)

Offline SKieling

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Sizing vents
« on: April 18, 2014, 04:26:20 PM »
I had the opportunity to talk to some folks recently who dried southern yellow pine. The subject of venting came up. They use only a few large vents on each side of a double track kiln. All the double tracks I've seen in the northwest, have several per side. It raises the question of what is better, a few large vents or several smaller ones. For example, would four 24"x60" vents be any more or less effective than ten 24"x24" or twenty 16"x18" ? We dry both DF and HF with conventional schedules, no high temp ones.

Thanks

Linkback: http://www.kilndrying.org/dry-kiln-control/5/sizing-vents/619/

Offline HencoV

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Re: Sizing vents
« Reply #1 on: April 20, 2014, 07:29:38 AM »
Rule of thumb: 0.03 square meter vents per cubic meter for softwood kilns. The total venting capacity is more important than size configuration....even more important is to have absolute control of the venting strategy.

Offline SenecaMike

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Re: Sizing vents
« Reply #2 on: April 24, 2014, 12:01:22 PM »
Think about how even you want your RH to be across the length of your kiln.  A few big holes will make it less even than many smaller holes.  That's my 2 cents worth anyway.  The CDK guys might see it different, as they run with no/minimal vents and no doors on the ends.  Their charge sees all of the zones on the way through though.


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