Originally Posted by Marke
Phil if its well sealed you could get yourself a cheap de-humidifier and put it on a timer if its really bad. I thought of this option if it was needed but so far I have had no condensation at all - touch wood.
Ten points to this man.
Today was wet, and the temperature got to a cosy 8.5C. I checked the humidity in the dome at midday and it was 87%. The inside temp was 9.5C and the mount temp was 8.7C. Much to my disgust there was a lot of condensation on the mount. A phone call from another IIS member jolted my memory about dehumidifiers.
I was looking at the exhausting option but it would have meant cutting a 150mm dia hole in the side of the dome. Not a great option.
I went out looking for dehumidifiers and found some seconds stock at Harvey Norman. They had a Delonghi model that would do 20L of water per day. The price had been reduced from over $400 to $220. So I bought it.
When I got home the mount was still covered in condensation. I plugged the dehumidifier in and waited to see what happened.
After about ten minutes the condensation evaporated.
Over the space of two hours the humidity dropped about 13% down to 74%.
I think if I cover the floor I will get a better result. but if I don't have to I won't.
The down side to this machine, it draws 400W.
If I use a timer to turn the machine on and off. It will not turn back on, the on button needs to be pressed.
The operating temp is from 2C to 38C
The dehumidifier has some auto settings. 50%, 60% and 70% relative humidity. If I choose one of these settings the machine will come on if the humidity goes above these levels.
I will monitor how it goes and let you all know after another bout of minus weather.
Thanks heaps guys for all you suggestions
Fingers crossed it is going to solve my problem.