Hi Guy's,
I have a Squirrel with backboiler, piped in 15mm copper and pumped by a bog standard central heating circulator to the other end of my 70ft boat. This feeds a 1500mm twin rad in the bedroom. If I run the squirrel on Exel or Taybrite I have a rad too hot to touch in a very cosy bedroom, and the fire stays in all night if the bottom vent is just left open a crack. First thing in the morning I just open the bottom door to let the fire heat up before topping up and riddling. Also have an ecofan, find it very useful as a visual temperature gauge!
Don't give up Tom and Sophie, the squirrel can provide enough heat and with experience it will stay in all night (took me all last winter of messing about with the vents !)
Andy.