The previous owners thought it would be a good idea to put a radiator in the attic of our house, which we have now insulated meaning the attic will get much colder in the winter.
I always keep both valves on this radiator turned off so as not to waste heat in the attic! So this means the water in most of the length of the feed and return pipes is never heated - the radiator is right at the end of a spur in the CH system.
Because of this I have been worrying about the pipes freezing in winter. Then I had the idea of draining the whole CH system, and then keeping all the valves to the attic radiator closed when I re filled the system - presumably leaving a big air lock right at the top of the system, and meaning most of the length of the feed and return pipes to the attic rad will be empty of water. Is this a good or a bad idea?
Is it possible that some of the air will find its way into the rest of the system? Logic says it shouldn't as the attic and the pipes to the attic rad are the highest point in the system...is there anything else I haven't thought of that could cause a problem with this idea?
Cheers.
I always keep both valves on this radiator turned off so as not to waste heat in the attic! So this means the water in most of the length of the feed and return pipes is never heated - the radiator is right at the end of a spur in the CH system.
Because of this I have been worrying about the pipes freezing in winter. Then I had the idea of draining the whole CH system, and then keeping all the valves to the attic radiator closed when I re filled the system - presumably leaving a big air lock right at the top of the system, and meaning most of the length of the feed and return pipes to the attic rad will be empty of water. Is this a good or a bad idea?
Is it possible that some of the air will find its way into the rest of the system? Logic says it shouldn't as the attic and the pipes to the attic rad are the highest point in the system...is there anything else I haven't thought of that could cause a problem with this idea?
Cheers.