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. Each topic below has its own page, with every guide on that condition listed under it.
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How are the topics divided?
Four conditions of a room, each with its own published guidance, its own failure modes and its own pattern through the night.
The overnight curve, the published room settings for adults, older adults and babies, and when the coldest hour arrives.
Humidity through a closed-door night, condensation on cold glass, and the humidity dust mites need.
Carbon dioxide in a shut room, winter ventilation and its heat cost, and what a home VOC monitor can tell you.
Light at the pillow, curtains and shades, the noise levels agencies publish, and masking sound.
Where does the room check fit?
The room check starts from what a sleeper notices on waking and points to the one condition, and the one reading, most worth checking first.
Each of its seven answers links back to the topic and the guide it rests on. The room check takes six questions.