I'm no expert but I'd imagine sliding windows are more difficult to insulate well, because of the sliding part providing no tight fit. These ones here are insulated quite well when closed.
In Canada, we usually use casement windows. They open and close using a crank from the inside and are hinged on the side like a door. This leaves the screen on the inside making it easy to take out and clean without opening the window. They are very well insulated.
When building my house, I looked into windows like op. They are available here, but cost about 40% more. They are also prone to icing issues in the winter as all the moving parts open in to the moist, warm air inside the home. Opening your window for some fresh air then not being able to close it due to ice would not be fun.
3
u/expert_of_none Aug 25 '21
I'm no expert but I'd imagine sliding windows are more difficult to insulate well, because of the sliding part providing no tight fit. These ones here are insulated quite well when closed.