To be sure, your wardrobe does not play a decisive role in heat insulation. For residential thermal insulation measures, external wall thermal insulation is the most effective, ideal and decisive one at present.
Only at present, the external wall insulation measures (thickness and material) of ordinary houses in most countries are designed according to a standard. This standard is based on the fact that the current energy consumption simulation or thermal calculation in architectural design is based on the average outdoor temperature and indoor heating temperature, so there is no difference between the insulation of the negative surface and the positive surface, which leads to the great difference in energy consumption between north and south rooms in order to achieve the same temperature and comfort when designing heating or air conditioning. In winter, the heating energy consumption of the North House is high, and in summer, the cooling energy consumption of the South House is also high. Looking at the whole year, it is relatively fair for you to share the expenses equally. If you don't believe me, try it in summer!
The development of building energy efficiency will solve this problem sooner or later, such as taking different insulation measures for different orientations and rooms, so that the whole house can achieve higher comfort and lower energy consumption in different locations. However, when there is the sun, the "north-south difference" definitely exists, and winter and summer are just the opposite. We can only make continuous progress, narrow this difference and reduce building energy consumption.
Europe, especially Germany, has done a good job in building energy conservation. We are cooperating with these countries to promote various building energy-saving technologies in China.
I hope these can help you.