Topics
Night Air is organised by the condition of the room rather than by the object being sold, so a reader looking for humidity finds humidity and not a mattress review.
How are the topics divided?
Five conditions of a room, each with its own published guidance, its own failure modes and its own seasonal behaviour.
Air and ventilation
Carbon dioxide in a shut room, the trade against noise, and what opening a window in winter costs in heat.
Thermal
The overnight curve, bedding as insulation, and why a set point is not a temperature.
Moisture
Humidity through a closed-door night, condensation, and the dust mite threshold.
Volatiles
Off-gassing from new mattresses and furnishings, and what a home VOC monitor can and cannot tell you.
Light and sound
Light at the pillow, blackout curtains and shades, and masking sound.