Circulating water in house without boiler being on.

if your house has doors and you close them on the bottom floors the heat will rise far faster than any from heat scavenged from upstairs

Thank you for the interesting thoughts, is that right that heat from down stairs will rise faster if the doors are closed? It is pretty open plan downstairs however we do close the doors so the stairs are isolated. Orginally I had hoped to see if there as a way I could redistribute some of the excess heat from upstairs back down rather than just venting it, and producing more downstairs.
 
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the heat will build up in the rooms with doors closed as hot air rises so rather than escape upstairs
it will build up from body heat electrical items and solar gain also fewer draughts with doors closed
 
Right sorry I miss understood, I thought you meant by rise that the heat would move up faster through the house with the doors closed rather than, a room down stairs will rise in temperature faster if the door is closed. That make complete sense to me, and we do infact keep the door closed down stairs, mostly however for cat control!
 
yes as your not sharing the heat with another area

a body will give out perhaps 250w off energy into the room per hour dependent on differential in temperature body metabolism and clothing [insulation ]
my bedroom in the middle off winter with the heating off will rise from say 13 degrees to 15or 16 degrees whilst i sleep and give out heat :D
 
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One reason your scheme will not work is that rads rely for most of their heat output on sir convection.

To start to use them for cooling you will need to move them close to the ceiling.

Also their heat output is based on a delta temp of 50 C so to cool to 20 C you might need them at - 30 C

Tony
 

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