I have used red for a long time now, all of the comparison people who ring up always come back with the same result when they check and agree that they have the best deal.
since 2008 I have only had ducted AC in the old house and the new one. Found less dust, less work than wood heating, and the house is even throughout, not boiling in the fire room and freeing everywhere else.
costs a lot less than bought firewood to run also.