Insulation of course works both for cold and heat but old buildings definitely have very bad insulation, new ones build the past 10 years have more stricter sta

Insulation of course works both for cold and heat but old buildings definitely have very bad insulation, new ones build the past 10 years have more stricter standards. Generally everything is built for high temperatures and with cooling in mind so many buildings prioritize airconditioning over efficient centralized heating systems.