heated bed instead of a bench?

My RMH is going in my walkout basement which I am thinking of turning into my masterbedroom. Is there any reason why I could nt or should nt make a bench 4'x6' and put a footon matress ontop and call it a bed? Crawling into a pre-heated bed everynight. How cozy would that be?

Could the bed catch fire? How hot do benches get?
Would the bed get too warm?
I have excellent draft with a 40 foot vertical chimey that runs up through the house and extends 2 feet above the roofline, but would that be enought to suck the smoke through the extra ducts?
Would I have too much mass (is that possible?)

Many thanks

Jeff Marchchand : with a properly made Cob workbench we wrap all the ducting in a cob of only sand and clay. the structural cob with straw in it for protection
from the knocks and jars of life are slightly insulative and mellows things out a little, this should be used as the last 2''-3'',then we put a finish cob on
top and the hand and eye tells you its a very firm leather couch Bed?

4' away from the Rocket Burner Base you should be safe but a futon left there a long time will start to smell like ironing
with a too hot iron ! More information at ernieanderica.info

A little bit counter-intuitive, a short stubby funnel will not flow as much liquid as an identical funnel with the long spout, this works with chimneys to. On the
rare occasions that something else is wrong with your system- pumping liquid with a pump, or flowing air with a booster fan, you run up against friction losses and trouble that I doubt you will ever see ! However do a little investigating about whole house 'Stack Effect' !there you could see trouble !
Big AL !

Any updates Jeff? Have you tried it? I intend to try it soon for a off grid cabana with fan to stay cool and RMH bed for cold winter nights. I'm in S MS so it doesn't get that cold. The building won't be fully enclosed to take advantage of breezes and save resources.

My other question is about moisture build up under the mattress. I have heard that box springs help prevent your mattress from getting mildew underneath. And I am in a moist climate. I think a box spring between the RMH bed and the mattress might nullify the heating benefits. Anyone have any thoughts?

Hey Jordan;
Not sure if Jeff is still here to reply.
A bed on your mass is very common.
Most folks use a thinner mattress and roll it up during the day and only roll it out in the evening.
External mass temps average around 100F or so depending on how close you are to the core.
Never heard of anyone using a box spring.
I think it would not be as nice as a heated mattress.

Here is one that I found:


source

How about a dog bed:


source