On Tuesday, November 28, 2017 at 5:07:30 AM UTC-5, Mark W wrote:
My syndicate are pondering an electrical hookup and dehumidifier for our trailer that's kept over winter at a site that's humid and cold (it's probably in cloud for 50% of the winter).

The trailer is an older metal trailer with unsealed doors and a rotating air vent.

I'm wondering how effective a dehumidifier can be in these conditions? It is possible to reduce the humidity in a non-sealed trailer or do you end up trying to dehumidify the world's atmosphere what with relative humidity and equilibrium as it is?


Mark - first, I would seal off the trailer as well as you can, otherwise -
as you already said - you will try to dehumidify the world.
I am using the chemical desiccant filled tubs (Damp-Rid is one brand name)

http://www.damprid.com/

I keep a few of them in my Cobra trailer which is well sealed plus two of them in the cockpit. They all fill up with water throughout the winter season, so I know they work. I live in South Carolina where the summers are very humid and the winters are not very cold but can be damp.

A friend of mine back north experimented with a self-made heater to keep the temperature up by installing a 100W incandescent light bulb inline with a small fan inside a metal duct and placing it inside his trailer. The fan kept the air moving while keeping the inside somewhat 'warm'. Since the bulb and the fan were in series, the whole thing stopped should the bulb burn out. It did work but I can't quantify how well.

Uli
'AS'