QUOTE(martin @ Jan 20 2008, 01:22 PM)

I would recommend a heater rather than the de-hum.
We have a de-hum at work which is costing £1000 a week to rent and the heaters blowing hot air in the other part of the building are doing a much better job.
Warm air and ventilation
If the heaters you have are the "jet engine" gas type then you do need the de-hum as the heaters chuck out a lot of moisture in the hot air.
Not sure about the size of de-hum for your shed/garage, but make sure you can modify it so it can drain externally, if it drains to its onboard tank you have to remember to keep emptying it or it will shut down.
Also keep an eye on the power rating for the de-hum (1000W uses 1 unit of power per hour), otherwise you will be selling the bike to pay the leckie bill!!
I have used the small tubular heaters in the past (only 600mm long and 120W) you can fix them to a piece of board and put them on the floor under the bike.
Miz.