New Zealand's single glaze tradition probably evolved with the open fires designed to radiate warmth to the gathering family creating a social focus as well as warmth. Condensation became a problem when heating the whole house became an option. When heated, single glass windows act as a cold pump by transmitting the outside temperature into the room via a cold down draught with condensation as a by product.
Real Glass, Real Wood
Max has developed a specially run molding using peninsula macrocarpa with fillet joints securing a second sheet of glass to the wooden window frame. This can be used on opening or fixed windows, or by putting the upper second sheet on the outside can also be used for hanging sash windows.
This system gives an air gap of about 30 millimeters between the glass panes, quite a lot more than is common in conventional systems.
Glass frames can be oiled for the natural Macrocarpa timber look, or painted to match the decor of your room.