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Air & comfort·applied

Indoor Environmental Quality

Why it matters

People spend most of their lives indoors, breathing whatever the building offers. The quiet tragedy of cheap construction is that "shelter" and "healthy" drifted apart: stale air, off-gassing materials, dry overheated winters, dark rooms. Indoor environmental quality reunites them. It is the pillar where sustainable building stops being an abstraction about the planet and becomes something a visitor feels within a minute of entering: air that tastes fresh, warmth that radiates gently instead of blowing, daylight instead of lamps at noon, water you drink from any tap. This is also where the movement wins converts. Nobody falls in love with a kilowatt-hour saved, but everyone remembers a building that felt alive to be in.

Role in 001's holistic picture

IEQ is one of the Four Pillars of our framework: comfort and health, standing equal to affordability, autonomy, and sustainability. This is the pillar the others must not cannibalize. It collects the outputs of half the catalog: fresh air, gentle warmth, dry summer comfort, clean water, materials that breathe. Where trade-offs arise, this page is the advocate for the human.

In the world

Indoor quality has four measurable dimensions — air, thermal comfort, light, water — and one felt one, the atmosphere of natural materials and a visible connection to outside that resists metrics yet drives half the value. All four measurable dimensions can now be metered without a laboratory: AirGradient publishes its CO₂-and-particulate monitors as MIT-licensed open hardware with step-by-step build instructions. The project began with volunteers helping a school in northern Thailand see its classroom air through the burning season. Anyone with a soldering iron can now watch these numbers in their own rooms. And the light after sunset is the dimension most often forgotten. Artificial light has quality metrics of its own: flicker, spectral completeness (CRI/R9), and the melanopic dose that drives the circadian rhythm. These too have left the laboratory: Optimize Your Biology publishes spectroscopy measurements for two-hundred-plus lamps, so a healthy bulb is now chosen on data, not marketing. At the other end of the market the same concern has become an asset class: the WELL Building Standard scores buildings on air, water, light, thermal comfort and more. By early 2024 it reached roughly 5 billion square feet of enrolled space across some 74,000 buildings in 130 countries, touching an estimated 25 million people. Healthy air has moved from afterthought to a number owners now compete on.

How 001 engages with it

House 001 lives this pillar daily — radiant warmth underfoot, natural materials, the felt dimension through every season — and has the record to go with it. A quality monitor has logged its indoor air since the day the house became liveable. The data flows, like most of the house's automation, through a vendor cloud rather than an open platform: an accepted trade, and the readings accumulate either way. And the air is not only recorded but answered: the house's two per-room ventilation units carry their own air-quality sensors and adjust themselves to what they measure. The Hlibivka design made radical comfort a founding goal: humidity self-regulation through natural materials, hybrid ventilation steered by air-quality sensors, drinking-grade water even in the shower, and light and orientation composed rather than inherited. And the published Unity Hub cooling work shows IEQ discipline under pressure: the chilled-floor idea died partly on a comfort argument (barefoot yoga on a cold floor), humidity was recognized as the true summer load, and ceiling fans were chosen for the perceived comfort they buy at negligible wattage.

Maturity: applied. Lived daily at House 001, its air logged since the house became liveable; designed as a first-class goal at Hlibivka and Unity Hub, with published decisions that chose comfort over convenient engineering.

Further reading