Re: Small Kiln for Turning Blanks ACTUALLY ON TOPIC

Derek,
When the dehumidifier is enclosed the heat it generates as a part of the
dehumidification process is recirculated. That might answer one of your
thoughts. Remember, only the drain hose and power cord are outside.

Also, I emphasized a basement model because it's specifically designed to
continue to dehumidify at lower temps. And, here in central North Carolina,
31% is exactly what I have now in my living quarters but wouldn't want to
circulate the airborne dust of my workshop through my regular HVAC. Outside
it's 66% at the moment. We may not be tropical but this is not a dry area.

TomNie

"Derek Andrews" <look-on-my-website@xxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:yNuwf.152241$Ph4.4647700@xxxxxxxxxxxxxxxxxxxxxxxxxx
> Tom Nie wrote:
>> Build a rectangular plywood box, well sealed and insulated with that hard
>> foam stuff at Home Depot, with a long side facing you and hinged to open
>> upward for loading. Include shelves that allow air circulation. Install a
>> dehumidifier (mine from Grainger's - BASEMENT variety) with drain tube to
>> a bucket outside (to monitor rate of drying). It's plugged into a simple
>> programmable timer (to control rate of dehumidification better than just
>> the control on some dehumidifiers). He even uses a small squirrel-cage
>> fan for interior circulation.
>
> I use a dehumidifier in my drying room, but only in summer when the
> natural humidity is high in my climate. There are two reasons for this.
>
> First, the relative humidity I am aiming for (35%-40%) is easily achieved
> in winter by modest heating. I just checked and it was down to 31% at only
> 21C/70F, so I turned the heat down.
>
> Second, my dehumidifier has a chart of humidity-temperature conditions
> below which it should not be operated since it may frost up and not remove
> water. I also suspect that close to these conditions it will be operating
> inefficiently.
>
> To achieve 40% RH, the recommended minimum temperature is 27C / 80F.
> Easily done in summer, but in winter will rquire quite a bit of heat.
>
> Having said all that, I am working in a whole room, 7'x8', with two
> outside walls, so situation is somewhat different. I also air dry wood
> before it goes into this room, and have a continuous in/out process rather
> than the batch process suggested. But would encourage anyone setting up a
> drying system to consider how they plan to operate it, and whether the RH
> can best be controlled by applying heat or removing moisture.
>
> --
> Derek Andrews, woodturner
>
> http://www.seafoamwoodturning.com
> http://chipshop.blogspot.com - a blog for my customers
> http://www.seafoamwoodturning.com/TheToolrest/ - a blog for woodturners
>
>
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