Skip to Content.
Sympa Menu

market-farming - Re: [Market-farming] Quieter greenhouse ventilation

market-farming AT lists.ibiblio.org

Subject: Market Farming

List archive

Chronological Thread  
  • From: clark AT crookedcarrot.com
  • To: "Market Farming" <market-farming AT lists.ibiblio.org>
  • Subject: Re: [Market-farming] Quieter greenhouse ventilation
  • Date: Tue, 6 Apr 2010 07:09:53 -0700 (MST)

Hi Brian,

Try an evaporative cooler rated to move enough air to get the
air-exchange needed. We have used window units in a small house
similar to yours here in Queen Creek, AZ. When the outside air
is cool enough you can turn off the water pump.

Clark Furlong
Crooked Carrot Farm
Gilbert, AZ
www.crookedcarrot.com


> We've just finished erecting a modest-sized (12x16 with an
> average height of
> about 8.5') lean-to style greenhouse in our backyard to support
> the plant
> sales we do at local farmers markets. We're in Tucson, so warm
> weather
> ventilation is critical, and in this particular situation there
> is no
> passive alternative - it has to be a powered, negative-pressure
> ventilation
> system. Houses are quite close together where we live, and we
> prefer to be
> good neighbors, so the sound of our ventilation equipment is a
> concern. Not
> the ideal situation, but for the moment, it is what it is.
>
>
>
> In our heat, its necessary to change the air every 40-50
> seconds, so I
> purchased a 20" direct-drive exhaust fan that's rated to move
> enough air to
> accomplish that (and a thermostat with an automatic
> variable-speed
> function). The problem is, I plugged in the fan today and it
> is much louder
> than expected, and I'm very concerned that it will be
> considered a nuisance.
> The (auto) variable speed controller will help by limiting the
> speed to
> whatever is necessary to catch up with the thermostat, but once
> it gets
> warm, it will be running the fan at full speed.
>
>
>
> My thought is that a larger fan, running at a slower speed,
> will have less
> motor noise, and less of the persistent "buzz" created by
> moving a large
> volume of air through a relatively small louvered vent (20").
>
>
>
> I'm hoping that others can either confirm or dispute this
> theory (before
> spending more money), and perhaps have some recommendations for
> a quieter
> type or brand of fan (and source). A big, slow-moving,
> belt-driven fan
> seems like it might be a better solution, but it may be
> somewhat
> out-of-scale (in capacity and cost) with my wee greenhouse.
>
>
>
> Many thanks for any response, it will be greatly appreciated.
> I'm a new
> member of this list-serve and will read any input in the daily
> journal.
>
>
>
> Brian Catts
>
> Victory Gardens
>
> Oro Valley, Arizona
>
>
>
>
>
> _______________________________________________
> Market-farming mailing list
> Market-farming AT lists.ibiblio.org
> http://lists.ibiblio.org/mailman/listinfo/market-farming
>
>






Archive powered by MHonArc 2.6.24.

Top of Page