Why does my new PVC door have condensation on the inside wimfoe

Your suffering with cold bridging, it's difficult to stop but some form of ventilation would help

1.If the condensation it is inside the glass, then you have to replace the double glazin 2. If the condensation it is inside of house, you should look where is the condensation (on the corners of the windows or on the whole bottom area of the windows). A. If the condensation is on the corners, then you have an open spot between wall and PVC frame and the wind with cold air is creating a low air pressure point where the moisture and humidity are coming inside. B. If the condensation is on whole area of bottom side of the windows, then is a problem of maintenance. You should OPEN the window every day for 20min and let the air to be changed. You should not forget the fact that in 8 hours you are breathing 360l of air...and by 20°C the air humidity it should be between 50 and 55%. All this condensation water, what you are seeing on the window, is excess water for your walls and it should go outside through 3 ways: 1. Walls ( Capillar Transmission) 2. Passive Ventilation ( Between PVC elements which are not 100% tight and also the vent holes into the frames ) 3. Active Ventilation ( By opening the window every day and making sure that the air is circulated. Advice: If you don't have time for Ventilation, you should fitt for every window into your house some Air Regulators ( AirVents) and leave them open when you are not home.