@freeschool @PawelK@qoto.org
In theory it should work for 1 room, but don't expect stellar performance. It won't heat up fast and you'll run it 24/7. But the biggest issue is that you NEED a pump to move the water. If you mount the kettle on a low point in the circuit, you might get away with convection currents doing the job instead.
As far as money is concerned, doesn't matter whether you do this DIY thing, or get a store bought electric resistance heater. You get the same electric bill for the same amount of heat. The only difference will be the speed.
But if you want to be more efficient with your electricity, you need a heat pump. Or in other words, get an AC that can also do heating. But that's gonna be the bigger up front investment.
@freeschool @PawelK@qoto.org
I didn't have a specific heat pump in mind. As for a way to hack the kettle heater further, I'm thinking maybe with an old water pump from a computer water cooler. Not sure what else could be used that would be easy to find/cheap if you want this to work automatically. You're limited basically to what you can reuse a water pump from.
A manual approach could involve using one of those very big squirt guns to push/pull water from the system.
@alyx @PawelK
Great reply.
If you had a heat pump in mind I don't mind have a look at a link if you have one.
And going a bit further, if sticking to this level of DIY and best we can find / cheap / crappy, do you think there is something else as device that can to push water around without being to professional or at least easy to find / replace like the kettle idea? (even if it's symbolic or kinda almost doesn't do the job :D)