I can't see why not.
We have an open plan kitchen / diner area with a vaulted ceiling which leads up to the landing, the only radiator in that area is a powerful one at the bottom of the stairs. Obviously most of the heat rises to the landing, I was wondering if a stove fan would help push the heat out into the kitchen / diner area opposite the radiator.
A ceiling fan at the top of the stairs is not wanted or practicable.
Our plan B could be a plinth rad under the kitchen units at the far end of the kitchen.