Another benefit of pants and ligh sweater is that around 20C it's much easier to maintain 50% humidity in cold weather reagions. And I'm talking about European

Another benefit of pants and ligh sweater is that around 20C it's much easier to maintain 50% humidity in cold weather reagions. And I'm talking about European A+ house with Mechanical ventilation with Heat Recovery. Above 0C I don't need run humidifier even, CO2 is around 650ppm. Below 0C humidifier keeps around 45%RH, dropping to 40%RH on -15C days. But set room to 23C and you need to run humidifier much much harder.