Sleep & bedroom air
The most important seven hours of your day happen in the room you measure the least. CO₂ triples overnight; humidity plummets; light and sound shape every sleep cycle.
Sleep is an environmental sport.
Bedroom air quality is the most under-measured corner of our lives. A closed bedroom with two adults reliably triples CO₂ from 450 ppm at lights-out to over 1,500 ppm by morning. Add winter heating and relative humidity drops below 30%. Add a streetlight through a curtain and melatonin shifts.
Each of these has a measurable effect on sleep architecture. Rising CO₂ correlates with more micro-arousals and less deep sleep. Low humidity dries mucous membranes overnight. Ambient light above 5 lx delays sleep onset; night-time noise above 40 dBA disturbs the deepest stages.
Envora puts a single device at the bedside and shows you, for the first time, what actually happens in your bedroom between midnight and seven.
You would suspect this when any of these feel familiar.
- Waking foggy even after eight hours in bed
- Dry mouth or sore throat on waking
- Frequent 3 AM waking for no obvious reason
- Snoring or restless breathing in a partner
- Morning headaches that clear with coffee
Quietly watching the exact signals.
Overnight CO₂ is tracked continuously — the full curve, not a spot reading. Envora shows you if your ventilation strategy survives the night.
The BME690 logs bedroom humidity across the night so you can see the heating-induced dry hours.
Photopic light and ambient sound — never a waveform, only an envelope — build a picture of what your circadian system actually sees and hears.
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Overnight average > 1,000 ppmDeep sleep is measurably lighter above this.
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RH < 30% overnightMucous membrane dryness · snore amplification.
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Bedroom light > 5 lx post-midnightMelatonin suppression threshold.
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Night dBA > 40Disturbs N3 deep sleep.
Practical steps, not panic.
- 1 Open a trickle vent or crack a window to keep bedroom CO₂ under 900 ppm; a bedside humidifier can hold 40–50% RH in winter.
- 2 Blackout to under 5 lx; a single LED on a charger can be enough to shift melatonin.
- 3 Lower the heating overnight — a bedroom at 18 °C is measurably restorative.
- 4 Check the night-time sound floor; a white-noise source below street noise often improves sleep more than silencing it.
- 5 Watch your overnight CO₂ curve alongside your sleep tracker for a week; the correlations are usually unmistakable.
The channels that carry this.
Strongest fit in these settings.
Catch sleep & bedroom air before it shows.
Envora One reads the channels that catch this risk early — fused into one IAQ score, calibrated at our bench. £249 one-time. Free for personal households.
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