A measurement
A sensor responds to a particular substance or condition. Its performance and placement matter.
Airplus / Science
Understanding begins
with good evidence.
The air in a home is complex. Our job is to make the useful parts easier to understand, while being clear about what the evidence can and cannot tell us.
Take a closer lookAir is part of everyday life.
Indoor air can contain particles and gases from sources inside a building, as well as pollution that enters from outside. Cooking, household products and building materials are among the sources discussed by the US Environmental Protection Agency. Ventilation and the way a space is used also shape the picture. Read the EPA introduction to indoor air quality ↗
This is why we think in patterns and context. The same room can feel very different through the day, and a single snapshot can miss that story.
What monitoring can offer.
A monitor can make some changes visible. The EPA describes consumer monitors as a way to gain information about particular pollutants or environmental conditions. That information may help people consider changes to a pollutant source, ventilation or filtration. It does not represent every aspect of indoor air quality. Read the EPA guide to consumer monitors ↗
Some context
Patterns are more useful when considered alongside what is happening in the room.
A decision
Information can support a practical choice. It does not make that choice for every household.
Where we draw the line.
Evidence about the effects of air pollution does not, by itself, prove that owning an indoor monitor improves a family’s health. Nor does general research on sensors validate a specific product. We do not present either as a clinical result for ALEX.
ALEX remains in development. This site does not publish independent performance validation for the finished device. The sources here explain indoor air and monitoring in general; they are not endorsements, certifications or tests of ALEX.
A monitor has a different job from an alarm.
Consumer air quality monitors are not equivalent to certified emergency alarms. The EPA explains that their alerts should not be treated as a substitute for smoke or carbon monoxide alarms. Keep the appropriate alarms in place and follow their instructions. Understand monitor limitations ↗
ALEX is not a medical device. If you have a health concern, a qualified healthcare professional is the right person to speak to.
An open approach to learning.
We want the explanation to be as considered as the object. That means making distinctions visible, linking to original guidance and changing our language when the evidence calls for it.
If you have a question about a claim, a relevant paper or experience to share, get in touch. Thoughtful questions help make this work better.