Funny you should ask about beds and RMH's...
Went into work one day, andd was telling a chinese friend, how i found out about these cool new stoves called "
Rocket Mass Heaters".
He then told me that - he had grown up as a child, in China - sleeping on the mass - of a Rocket Mass Heater...
It is possible, just check with your home insurande - it could void your insurance.