 • Likely, it is important to make sure that the living spaces behind the Trombe walls contain enough clerestory, skylight, or windows on the other walls of the room to provide daylight and prevent these spaces from being dim.• If Trombe wall is constructed with upper and lower vents, the upper vent on the thermal mass can suck the heated air from the warmer indoor spaces to the cooler air space between the mass and the glazing (reverse-siphon) at night.To avoid this from happening, it is necessary to use back-draft dampers.