Portable and cosy with a real flame effect although a lot of folks have always seem to comment just how old fashioned this space heater looks.
I have a couple of backup LPG space heaters stored in the cupboard under the stairs such as this portable Provence Living Flame Flueless Stove heater. It runs on 15kg LPG bottles and gives out 3KW of heat for around 68 hours (Generally a 15KG bottle of LPG will last around 1-2 weeeks during the winter). The LPG bottles are stored in the garden shed with enough to keep going for about 1 month. I'm also looking to get a Honda 1 or 2 KW silent gas electricity generator to turn the garden shed into a local emergency power station to supplement the on going solar PV/refrigeration project.
I am currently using grid electricity night storage space heaters which use night rate electricity. I may intend to use the LPG space heaters during the exceptionally cold days as they are cheaper to run during the day than using the boost heat setting on the electical storage heaters as the day time rate for grid electricity is actually more expensive at the moment.
The 15Kg LPG bottles can also be easily used in conjuction with a camping stove such as the Primus Oden twin burner stove for emergency cooking.