Quote Originally Posted by AndyHX View Post
Big Freeze , how does demand control work , on internal humidity levels?
Ya, you have one centralized extract fan that is ducted to all you wet rooms. The vents in the wet rooms have a humidity strip that opens the vent above a certain level and the fan reacts to that. There are also vents in your dry rooms that open on the same principle but they are not ducted back to the unit and just allow air in room outside.

Your soil temps are crazy high. Didn't think it was possible but there you go . Geo is definitely back on the agenda then.