> Why aren't there sprinkler/fire retardant systems for the perimeter/external part of a house? There are. Google "external bushfire sprinkler systems" and loo

> Why aren't there sprinkler/fire retardant systems for the perimeter/external part of a house? There are. Google "external bushfire sprinkler systems" and look at anything from a .com.au domain. These systems are as much a startup as HVAC (i.e. not really), but they still rely on software control, because owners need reassurance that the sprinklers will activate automatically even if they have already evacuated. Detecting the appropriate activation circumstances is a high-stakes decision to hand off to a machine, and thus a potential goldmine for anybody who gets it right.