Couldn't an waste air heat recuperation be fitted in way that would keep the architecture preserved? Seems such a waste to have this kind of heating in this day

Couldn't an waste air heat recuperation be fitted in way that would keep the architecture preserved? Seems such a waste to have this kind of heating in this day and age. I'm guessing the temperature and humidity wary a lot inside, so if not for the sake of bills or the environment, proper air conditioning could be done for the sake of comfort.