THE AIR WE CANNOT SEE
A room can look immaculate while containing airborne particles and other pollutants. Understanding indoor air begins with looking beyond appearances.
Celebrating a career of leadership, education and impact
From contractor leadership to public education about healthier indoor environments, John Kay has spent nearly three decades connecting people, building science and practical action. This showroom celebrates his professional journey and the communities his work seeks to serve.

The person behind the work
John’s professional story connects customer service, contractor development, organizational leadership, home performance, indoor air education and the belief that people deserve to understand the buildings around them.
His message is not simply that cleaner air matters. It is that the unseen environment deserves attention—and that knowledge becomes meaningful when it leads to well-considered action.
The career journey · 1997 to today
Select a career chapter to read more. Dates and positions are drawn from John’s publicly shared LinkedIn biography; descriptions are contextual summaries rather than independently verified project achievements.
The ideas that give the career its meaning
John’s signature phrase invites people to think differently about their indoor environments. These six themes connect his writing, educational work and business philosophy.
A room can look immaculate while containing airborne particles and other pollutants. Understanding indoor air begins with looking beyond appearances.
Ventilation, airflow, humidity, temperature, sources, filtration and building materials affect one another. One change can influence an entire home.
Indoor environmental quality matters wherever people spend time. Schools bring students, teachers, facilities teams and families into the same conversation.
John emphasizes helping people understand what affects their indoor environment and earning trust through service and clear communication.
Research raises awareness, but someone still has to identify the conditions, select appropriate measures and make meaningful improvements.
John’s work connects contractor teams, business coaching, community partnerships and the people they serve.
Interactive learning experience
Explore a room to see the kinds of questions John encourages people to ask. These are educational examples inspired by the themes of his public writing, not documented projects from his career.
Living spaces
Not necessarily. Some relevant airborne pollutants cannot be identified by sight or smell. Everyday activity, outdoor air, furnishings, cooking and pets can influence indoor air.
Look at possible sources, source control, cleaning, ventilation and appropriate filtration.
The visual tribute · two commemorative pieces
Both commemorative illustrations appear below in full, in sequence. Select either image to enlarge it.
TRIBUTE IMAGE 01 / 02

A visual tribute to a career of leadership, education, and healthier indoor environments.
WHAT THIS IMAGE CELEBRATES
John’s progression from front-line service and sales into leadership, contractor development and indoor air education. The chronology shows that his current advocacy grew from decades of work with homeowners and teams.
CONTINUE THE STORY
Next: see how those career chapters translate into a mission to improve indoor environments, one building and one relationship at a time.
TRIBUTE IMAGE 02 / 02

His continuing mission: education, awareness, better homes and a positive effect beyond one building.
WHAT THIS IMAGE CELEBRATES
John’s wider purpose: helping people recognize indoor environmental conditions that are easy to overlook, strengthening the connection between homes, schools, education and community wellbeing.
CONTINUE THE STORY
Next: explore John’s published ideas and how his writing makes building science accessible to a wider audience.
His public voice
John writes the weekly newsletter The Indoor Air Environment and shares articles that make building science, air quality and healthy-home decisions understandable to broader audiences.
John’s weekly newsletter, making sense of the air where people live, work, learn and play.
Find this writing on LinkedIn ↗An invitation to discover what we fail to notice about the air inside our homes.
Find this writing on LinkedIn ↗An examination of indoor air in schools and its relationship to healthier learning environments.
Find this writing on LinkedIn ↗How airflow, humidity, building conditions and everyday actions connect.
Find this writing on LinkedIn ↗A public-facing discussion about the value of understanding indoor air and who may benefit from better air-cleaning practices.
Find this writing on LinkedIn ↗Through CN Air Group and Elemental Air Systems, John’s current public work includes indoor air awareness, air purification, business development and education-focused partnerships. He has described himself as a certified building scientist and certified business trainer and coach. The focus of this tribute is his entire professional journey, not an endorsement of a particular product. His work connects the practical realities of serving customers, training teams, helping contractors communicate clearly and teaching people about the invisible conditions inside buildings.
A continuing mission
From building businesses and teams to helping people think differently about the air they breathe, John Kay’s professional story is still unfolding. It deserves recognition for the commitment to education, trust and practical service that runs through it.