[h] HearthlyLabs
THE INTERPRETATION LAYER BETWEEN
INDOOR ENVIRONMENTS AND HUMAN BIOLOGY
The biological brain
for indoor environments
HearthlyLabs reads the everyday signals a space gives off — light, air, temperature, humidity, sound — and translates them into evidence-grounded guidance on how that space is likely to affect your circadian rhythm, sleep, cognitive performance, and recovery.
Environment in
Biology-aware interpretation
Outcomes out
Five signals · one body · accumulated over time
Exposome Intelligence
= EXPOSOME + AI
The exposome is your cumulative environmental exposure over time, and what it does to your biology. A tool that forgets yesterday cannot read it.
HearthlyLabs is built on the four things the science requires.
01
Accumulate
Every reading builds one continuous picture of a space over time.
03
Personalise
Interpretation is anchored to your own body clock, not an average.
02
Fuse
Five signals combine into a single environmental-load number.
04
Explain
Every reading opens to its mechanism, evidence, and confidence.
GROUNDED IN PEER-REVIEWED RESEARCH
An emerging, funded scientific field
~90%
of life spent indoors
Most lifetime environmental exposure happens in spaces almost nobody understands.
Klepeis et al. 2001 · NHAPS · 87% indoors, 6% in vehicles
300+
scientists · 50+ countries
The Human Exposome Moonshot set the field's 60-year agenda: from documenting environmental harm to designing healthier environments.
Washington DC · May 2025
€106M
European research funding
Nine Horizon 2020 projects, 126 research groups across 24 countries. The concept existed for decades; the tools did not.
European Human Exposome Network · 2020–2025
AI is “the Apollo Guidance Computer of the exposome.”
Sillé & Hartung · Frontiers in Artificial Intelligence · 2025
Explainable by default
Every reading opens to its evidence
Pattern, mechanism, likely impact, evidence, and how confident we are. Directional, never deterministic.
HearthlyLabs interprets the environment, not you.
FUSED LOAD
27
Five signals, fused into one number that grows with you over time.
Per-signal precision
Each signal reports only what its own evidence supports
Every claim is scoped to the outcomes the primary literature actually establishes, and labelled with how strong that evidence is.
High · circadian & sleep
High · Ventilation
Moderate · High
Moderate
Moderate · comfort
CONFIDENCE
Humidity
Sound
Signal
Light
Temperature
Air · CO₂
Circadian regulation and sleep timing; daytime alertness and mood
≥250 mEDI lux day
≤10 evening · ≤1 sleep
Higher-order cognition and decision-making — not sleep or mood.
CO₂ is a ventilation proxy
< 1000 ppm
Cognitive performance, focus, fatigue, comfort
21–23 °C
WHAT THE EVIDENCE SUPPORTS
REFERENCE BAND
Attention, cognition, mental fatigue, autonomic load
< 45 dBA · focus work
Comfort, respiratory & mucosal health — not cognition directly
40–60% RH
Grounded in peer-reviewed science
Brown 2022 · Satish 2012 · Allen 2016 · Cedeño-Laurent 2018 · Lan 2022 · WHO 2018 · Du 2023 · Windred 2024
We measure the environment
We personalise the interpretation
Directional, evidence-based, never medical · We never monitor your body
Be among the first to use it
Opening in small batches, starting with design partners who want to shape it with us.
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The biological brain for indoor environments
Suzana Lepanovic, trading as HearthlyLabs · Bregnegangen 8, 2300 Copenhagen, Denmark · hello@hearthlylabs.com
HearthlyLabs interprets the environment, not you. It does not diagnose, measure your body, or predict individual health outcomes. Guidance is directional and evidence-based, not medical advice.