My house is Oil Fired CH but the living room also has an open grate. The problem is that in the winter there is a huge draught up the chimney when the wind blows. This draught is so strong that it has bowed the living room door from the air being drawn from the hall. It is also strong enough to allow me to burn fuels like Phurnacite, typically used in glass fronted fires.
Obviously this makes the room very hard to heat with a radiator. Is there any sort of baffle or cowl which can be installed on the chimney to limit the draught. I still want to burn the occaional fire but I want to reduce the draught.