[time-nuts] Temp/Humidity control systems?

Eric Garner garnere at gmail.com
Wed Oct 26 14:04:07 EDT 2016

I would start looking at the ductless heat pump systems that are becoming
popular now they don't take up much space, have pretty good capacity and
are efficient. I have no idea if they can be proportionally controlled or
what the temperature hysteresis on them are though, which might be an issue
in a room the size of a sheet of plywood.

On Wed, Oct 26, 2016 at 10:58 AM, John Ackermann N8UR <jra at febo.com> wrote:

> On 10/26/2016 1:00 PM, Richard (Rick) Karlquist wrote:
>> On 10/26/2016 8:59 AM, John Ackermann N8UR wrote:
>>> I may have the opportunity to build a small "clock room" and am
>>> considering whether I could make it an environmentally controlled space.
>>>  I'd like to learn about the options for doing this.
>>> The space would probably be 6x8 feet or so, in a basement with one
>>> outside wall.
>> I'm lost with the basic concept here.  Help me understand this.
> This room would be a large closet in my basement where two racks of
> various OCXO, Rb, Cs live. There wouldn't be a lot of in-and-out traffic.
> I'm not looking for 0.01 degree regulation -- <1 degree C and a few percent
> humidity throughout the year seems a reasonable goal.
> What I envisioned was a very small heat pump or other heating/air-con unit
> coupled with some sort of proportional control. I just don't know where to
> start looking for that, or what other issues to be thinking about.
> (I know the way time-nuts think, and I recall the great ideas posted here
> in the past about using an old refrigerator, or burying standards in a deep
> hole -- but this would be wrapped into a bigger construction project that
> I'm going to be managing from a distance, so I need to keep it fairly
> straight-forward.)
> Thanks, all!
> John
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Eric Garner

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