Some windows are specialists. When normal eye-level windows won't work due to privacy considerations or lack of wall space or views, consider the clerestory. Set high in the wall, clerestory windows enhance a room's feeling of spaciousness by bringing daylight deep into the house.

As with all glass windows, there is some heat transfer through clerestories, but double-glazing and low-emissivity can offset this disadvantage. South-facing clerestory windows can allow additional heat and daylight into a home, but they should be shaded by a roof eave or other overhang in the summer to prevent over-heating.