My problem is that in winter, on cold days, all of the first story windows exhibit condensation on the window facing the inside of the rooms. The windows are thermopane, with metal frames. The furnaces are not equipped with humidifiers. The basement has a high capacity Sears portable dehumidifier which is operational all through the year. We have several small plants in the kitchen.
Cooking is done for only two adults.
Fans are installed in the ceilings of the lavatories. I believe that the house walls plus insulation is too tight to allow humidity to leave the house. Therefore, the humidity forms on the windowns during cold days. The same sweating occurs on hot humid days when the air conditioner is operating. Please furnish a solution for this problem.