http://www.fixmyroof.co.uk/videos-and...
This is just a quick review of the Meaco low energy 12L dehumidifier. This small popular dehumidifier is efficient, and has an extremely low power consumption of only 165 watts, making it very economical and cheap to run. Probably the cheapest to run that I've seen, that actually works well. Just keep in mind this is a compressor based dehumidifier, so if you are thinking of using it in unheated or cool locations, you may be better of with a desiccant type dehumidifier instead, and those are explained on the website in the link below.
An up to date list of great dehumidifiers and the user manual for this particular dehumidifier can be seen via the link at the top of the description where you can also find affiliate links if you wish to purchase.
If you're interested in how I test them you can read that here : http://goo.gl/UhyAb8
If you want to see the bigger 2 speed 20L version I have a video here : https://youtu.be/EfxReE0sk-E
Hope this helps...