I just want to plug a client that I worked for that solves this problem: Healthy Workers.

Healthy Workers is a Amsterdam-based startup that measures thing such as: air quality, CO2 and consented employee data (e.g. their sleep and focus) and makes an analysis what parts of the building have an unconductive work environment and how this can be improved.

Conference rooms with bad air are the first problem they look at.

They are hiring for a head of sales and a product designer: https://healthyworkers.recruitee.com/