growing seeds at high temperature

[Bruno Moncorge]

I would like to grow seeds from plants requiring a warm temperature 
(27/30 degrees celsius). Does anyone know how to design an small amateur 
in-doors greenhouse. Where to get the heat from ? Electrical device ? How 
to design the device ? Is it possible to buy such a thing ?

Thanks for all your tips.
Bruno Moncorge (moncorge at worldnet.net)