"john t west" wrote in message
...
Looking at how some people are protecting their Green Houses against the
frost, i was surprised how tiny the flames were on the paraffin heaters in
the green houses. They were hardly giving off any heat at all.

I was told its not about the 'Heat', but the fact that the flame changes
the 'relative humidity' in the air'.

Could anyone explain fairly simply, how this actually works? Thanks

Doesn’t say anything about it in
http://www.fao.org/docrep/008/y7223e/y7223e0d.htm
so I doubt it myself.

And
http://www.autogrow.com/general-info/humidity-and-vpd
says that you want to ensure that the humidity doesn’t get
too high by venting which makes it even less plausible.