Recently moved into our renovated house, temperature is great everywhere, around 20ºC, except the master bedroom that sits at about 21-22ºC all day and shoots up to 23+ every night. I want to get ahead of this before the summer overheating risk really starts!  Full build context below. Our goal would actually to be to keep it cooler than the rest of the house, e.g. 19ºC   The bedroom + ensuite have a supply + extract duct so I was hoping these would make a balanced pair and not need mu