Hi,
My dehumidifier at home expired on Boxing day, needing a replacement fairly smartly, mainly for the bathroom, I found the following -
From Aldi, Midi Dehumidifier £34.99: Peltier type. 20.5 W 13.0 D 34.0 H
Now, the adaptor accepts 230V 50 Hz and puts out 12V DC 5A The device is rated @ 65W
It states suitable for rooms 10M2
I know it's cheap, I know it's small but seems to me it would be OK for a narrowboat in this time of condensation & dampness particularly if the lead is modified to run directly from 12V DC.
The one that's gone bust was about £160 and has lasted only 3 years, so if I only get one year out of this I'm still in front.
Happy New Year to all
Cheers
HH