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market-farming - Re: [Market-farming] Bench heating in greenhouse

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  • From: "Sharon and Steve" <shopkins AT tdstelme.net>
  • To: "Market Farming" <market-farming AT lists.ibiblio.org>
  • Subject: Re: [Market-farming] Bench heating in greenhouse
  • Date: Fri, 8 Feb 2008 20:13:33 -0500

Rachel,
I am having some trouble with details here, just what is it that you are trying to do? 4 x 40 sounds like a giant area for just stuff like germinating and rooting stuff.

Is the modine a hot air unit or a hot water unit?

If it is hot water, then you will be running a boiler and from that it is simple to run fin pipe, bio-therm tubing, or plain old black plastic pipe (up to 130 - 140 F water) under or on a bench you want to heat. Pex is excellent, but pricy. If you place seedling trays on warm water pipes you will find that seed usually comes up first right over pipe and a bit later between the pipes.
\
If it is a hot air unit you may want to use the mats for a season till you see just how much extra heating you need, you are looking at big bucks to put in hot water to heat a bench the size you mentioned.

I used to do a 4 x 16 bench covered and skirted with poly, with a 15 dollar electric heater under it for the short season when we needed lots of hot space for germinating cukes and melens. Used a line voltage thermostat with a probe that could be placed directly in the dirt.

MAsteveINE











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