We have 10 foot ceilings in our house. 9 feet is just too low.
Line up the top of the windows with the top of the doors. We have 8' tall doors.
I really dislike windows that go to the floor since furniture covers up the window. As a local radio station advert says, "It just don't make sense." Our windows are 5' and 6' tall with most being 6 so we have at least two feet of space from the floor to the bottom of the window. Two feet is a good compromise distance. Three feet would provide too little of a window for us.
HOWEVER, you are in The Great White North and I hear it gets cold up that way and stays cold. :laughing::laughing::laughing:
I designed our house to handle hot weather not cold. It is supposed to cost more to cool a house than warm a house and we usually have more hot weather days than cold. The 10 foot ceilings move the heat away from us which is great in the summer but not so much in the winter. If the humidity is below 60% we do not run the AC until the house temp goes over 84. Buildings in town built around 1900 have what looked to be 16 foot tall ceilings. We thought about putting in 12 foot but that was too much for a variety of reasons.
Windows are holes in the wall. I am sure we would be warmer in the winter if we had smaller windows but this is subjective as well. We heat with wood and most of the time the living room will be 80-82 with the bedrooms furthest from the stove being at 70-72. Even on single temperature days which seldom happens the bedrooms will still be in the mid 60's. If we were up Nawth where cold weather is an issue our house would be designed differently and we would not have the number of windows nor the size of the current windows. Each major room has one window that is 8'x6' and usually a secondary window as well. The living room has a 12'x6' window. I don't think we would do that in a cold climate.
If you have wide windows you need to be mindful of header size to support the structure over the window.
An advantage to higher ceiling heights is that you are not hitting the ceiling fan with ladders and such when you move through the house. In fact, we don't even notice the fans at all since they are above our line of sight.
Later,
Dan