The images shows a mock up of what will be my downstairs livingroom, upstairs livingroom and main bedroom in a, hopefully, soon to be constructed house.
The heater is an Arrow 2400 and is supposedly capable of heating around 35sq. A lot (probably most) of the heat will go up the stairs into the second living room. Above the downstairs living room is the main bedroom.
My thinking is thus: If I was to put a floor vent in the main bedroom, and the doors were open, then I should be able to get the air to circulate – a thermosyphon.
The warm air would go up the staircase and then come back through the upstairs living room, through the bedroom door and across the bedroom and then down through the vent and back into the downstairs living room, somewhat cooler by this time.
My question is – what size would the floor vent need to be to get a meaningful flow of air? I have made it 800x300 in the design for no other reason than I know it will have to be large and that seemed to me to be a fair size. The vent can be seen under the table and chair in the bedroom image.
What do the smart people on this forum think?
The building permit should be coming shortly so the design won't change, but the colours, furnishings etc. are just there for display and planning purposes.