The criteria for windows in my new build included:
Hopper style for maximum ventilation and maximum visibility.
Very fine fly screens.
Ability to open and close the window without having to open the fly screens and let the bugs in.
Ability to open the window a little, or a lot.
Clear or tinted glazing of light weight 3mm scratch resistant polycarbonate.
Decent quality and parts availability.
Insulation was not a top requirement.
All the commercial offerings that I found failed in one or more requirement, so I decided to have a go at developing my own.
I got as far as building a prototype using pencil linear actuators to open and close the hopper (without removing the fly screen).
The window frame is a simple aluminium T section with a self adhesive seal between the outer T and the outer wall. It needs no 'wall frame'. I use this basic design for internal and external hatches and it works well.
You get the idea, but it needed a lot more work and the linear actuators that I tried were poor quality. Eventually I ran out of time and bought some relatively poor quality commercial offerings and re-glazed the acrylic with scratch resistant polycarbonate to get me moving again. Like these...
A leaking window can allow a great deal of air to escape your caravan, and can also allow many bugs to enter when the windows are open. When choosing replace
www.caravanrvcamping.com.au
Cheers,
Peter
OKA196 motorhome