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Sacha[_3_] · 21-02-2009, 10:36 AM posted to uk.rec.gardening

On 20/2/09 23:18, in article , "K"
wrote:

shazzbat writes

"drmrbrewer" wrote in message
...

We've inherited a very nice greenhouse from the previous owners of our
house, fitted out a few years back to a pretty high standard. However,
the automatic vent openers no longer seem to operate as they should,
mostly stuck closed.

I can't find any information as to how to maintain these, and whether I
just need a replacement black piston thingy (and if so, what I do to
replace it), or whether I need to replace the whole mechanism including
the arms etc, or whether in fact it is possible that some simple
adjustment would do the trick. How long do these things normally
last?

How have you ascertained that they're not working? They are thermally
operated, and I doubt if anywhere in UK has been warm enough to open them
for some time now.

My father's were open in Leeds earlier this week.

With a bit of sunshine, the temperature inside a greenhouse soon rises.

Ours are opened every day except in really freezing conditions. As you say,
it soon gets very warm in a greenhouse. One of ours got up to about 25C the
other day.
--
Sacha