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adding one small pump to a gravity-fed system
I have a open gravity-fed hot water system in my two-story house in central New York state. All the radiators are on the first and second floors, and there's an expansion tank near the ceiling on the second floor.
I have a small finished bedroom in the basement that currently has electric baseboard heat, but I'd like to heat it using the boiler and hot water. The problem is that the room is no higher than the boiler, so gravity won't move the water to and from a typical radiator. (The room is safely separated from the boiler by a rock and cement wall though.)
One option I see is to buy a used ceiling-mounted radiator. I wonder though whether this will keep me warm enough in my bed since heat rises.
Another option is to use a normal floor-mounted radiator and install a small low-flow pump just to circulate water through this branch of the hot water system. Do such pumps exist? If so, what are some brand names and where could I buy one?
I'd rather not add a pump to the entire system because I like the simplicity of the system and that all it needs is 24 volts to run the thermostat.
Any advice would be most appreciated.