I need to prevent a small outdoor enclosure from freezing. The box is about 1m cube, constructed of wood, waterproof, well insulated and fairly draught free. It does not need to be warm or hot, just a few degrees above freezing.
The heater needs to be mains voltage and small. It will be controlled by a suitable froststat or thermostat. I reckon about 20W would do the job but the smallest I have found so far is a 12inch tubular heater @ 45W. This would do the job but I would prefer something physically smaller.
Any ideas or alternative suggestions please?
TIA Nick.