[Market-farming] Greenhouse Controls

Andy Fellenz artisanfarms at gmail.com
Sat Mar 23 15:18:11 EDT 2013

You can use 120V thermostats with a contactor block sized for your fan
motors.  I use these in my houses and they work fine.
http://www.northerntool.com/shop/tools/product_612108_612108 . They are $30
each.  Depending upon the amp draw of your fans, you might need one for
each fan/shutter combination.  The only negative with these is that you'll
only be able to set one termperature, rather than different temperatures
for day and night.


On Sat, Mar 23, 2013 at 2:49 PM, David Paysnick <davepays at gmail.com> wrote:

> I'm looking for some advice on greenhouse controllers.  I'm looking to
> control heat (propane) and ventilation fans (2x 24" slant wall fans with 2
> 36" motorized shutters)  with different day and night time temps.
> Wadsworth controls have been highly recommended, but are going to run
> around $2000 (Step Up system).  I'm looking to spend between $250-500.
> Any suggestions?
> Thanks!
> --
> David Paysnick
> Rainbow Harvest Farms
> 178 Conway St.
> Greenfield, MA 01301
> 413-475-3392
> www.rainbowharvestfarms.com
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