Hi there,
An easy solution is to set the element classification of the window to 'Door' which can be found within the Window Selection Settings>Categories and Properties (AC20) Tags and Categories (AC19 and previous)
Then within the Scheme Settings of the schedule instead of using Element Type is... Use Element Classification is Door. That way the schedule will combine both the window and door elements into one schedule.
Here is a link to two screenshot which explain the above -
http://imgur.com/a/OxkWk
Kind regards,
Marcus