srawlings@cix.compulink.co.uk writes
>
>
>On this subject, has anyone seen a low cost humidistat that could be used to 
>switch a pair of 1kw fans on and off in my grain store? 

http://www.aircare.co.uk/plugin-humidistat.htm £45
http://www.amazon.co.uk/Advanced-Timer-Technologies-Plug-in-
Humidistat/dp/B0017HLU2W £46

>Low cost as I do not 
>anticipate needing it after this year! I did wonder about pulling a cheap 
>de-humidifier apart and getting the stat out of it. I wonder what one would 
>make of being hooked to a Lishmann Pedestal?? 

The trouble with pedestals is that they tend to recirculate air within
the building and heap. I know some people who have installed quite large
fans in the side of the building to fix this problem.

-- 
Oz

In article , Oz@upthorpe.org.uk 
(Oz) wrote:

> *From:* Oz 
> *Date:* Sun, 14 Sep 2008 11:07:21 +0100
> 
> srawlings@cix.compulink.co.uk writes
> >
> >
> >On this subject, has anyone seen a low cost humidistat that could 
> be used to >switch a pair of 1kw fans on and off in my grain store? 
> 
> http://www.aircare.co.uk/plugin-humidistat.htm £45
> http://www.amazon.co.uk/Advanced-Timer-Technologies-Plug-in-
> Humidistat/dp/B0017HLU2W £46

Ah, thank you, no info on the load they will switch, but I will drop them 
a line.
> 
> >Low cost as I do not 
> >anticipate needing it after this year! I did wonder about pulling 
> a cheap >de-humidifier apart and getting the stat out of it. I 
> wonder what one would >make of being hooked to a Lishmann 
> Pedestal?? 
> 
> The trouble with pedestals is that they tend to recirculate air 
> within the building and heap. I know some people who have installed 
quite large fans in the side of the building to fix this problem.
> 
I attempt to prevent this being a problem by operating the fans in tandem, 
making sure they are venting out of the building, I have wondered in the 
past about putting a pipe on the fan outlet to make sure the air does go 
out! The best results in the past were actually in open cattle yards which 
may have been down to the open aspect.


Steve Rawlings

srawlings@cix.compulink.co.uk writes
>I attempt to prevent this being a problem by operating the fans in tandem, 
>making sure they are venting out of the building, I have wondered in the 
>past about putting a pipe on the fan outlet to make sure the air does go 
>out! The best results in the past were actually in open cattle yards which 
>may have been down to the open aspect.

I have wondered about powering them from one large fan situated at the
building wall and connecting them with flexible ducts over the grain.
Unperforated 6" or 9" drainage pipes for example. This is more expensive
but should work very well and it would be easy to remove the ductwork
before emptying.

The total fan cost would be significantly cheaper, too.

NB One could also blow every other one, with the unblown ones allowing
some lateral airflow at the base of the grain.

-- 
Oz