Dehumidifier question

[dazzy2000]

Hi

My greenhouse is now all wrapped up with bubble wrap for winter and starting to get condensation. I have a humidity gauge and it has reached 82%. My question is, does anyone use a dehumidifier in the greenhouse to help combat the dreaded moisture problem.

I would be very grateful for some opinions and what if any would be the best.

Thankyou
Darren

[Cidermanrolls]

Yes. I have one in each of my greenhouses. I use desiccant models as these work at low temperatures. Pick one with a constant drain option and feed the hose to an appropriate place - you’d be amazed how quickly a 3l tank can fill up. Most of the time I run them on minimum setting, but up to max for a day if I have sprayed or watered.
I bought all of mine through appliances online, other suppliers are available. Expect to pay around £150.
The heat these give off will supplement your regular heating.

[dazzy2000]

Thankyou for the advice, glad I asked as I didn't think of the potential temperature issues. I will purchase one tomorrow.

Thanks.

[Phil_SK]

Dry air would be wonderful but my plants have had to make do with standard UK winter humidity for many years and generally cope well. I wouldn't imagine dehumidifier use was very widespread - or is it?

[juster]

It's interesting to read of other people's experience, but I've never used a dehumidifier. Possibly it's easier here in the south, but I just go out and open the windows on fine days when it's not cold, remembering to shut them later.

[Chris L]

Wouldn't the GH need to be air tight? Otherwise, surely, it is just pulling moisture in from outside... :

[el48tel]

And running costs around 1 GBP per day (because the GH is not airtight)

[Chez2]

We were considering it last year as we have large tropical plants in our tunnels with big leaves. These increase the humidity. We seal up the double doors at one end of the tunnel for winter but open the other end when its not too cold. We use a fan to keep the air moving. It worked without dehumidifier last year.

[rodsmith]

I've never used a powered dehumidifier in my greenhouse (when I had one) or conservatory. The humidity regularly reaches 99% in winter (and I assume 100% but my gauge doesn't record this). I suffer the occasional loss but have never even considered using a dehumidifier.

[ragamala]

One factor not mentioned so far is heating method.

If gas or (God forbid) paraffin, then you will have a humidity issue. With electric heating I don't foresee a big problem, and have never had one.