Totally agreed. Smart homes seem to lack focus in that area - this seems to be by far the lowest hanging fruit in terms of improving quality of life / health, that smart homes could tackle. Central heating & air, heat exchangers, good isolation, sensors in every room for CO2, humidity, temperature, pollution and maybe O2. A small LCD per room with some warning & error lights (and otherwise no background lighting) if anything goes outside set parameters. In countries like the US where smoke detectors are already mandatory, maybe they could just be replaced with a new generation that offers these capabilities.
