"Residential CO2 scrubber" seems like the sort of gadget eccentric rich people would buy, sort of a distributed DAC system.
That said, it seems intrinsically wrong-headed to me, a kind of trojan-horse technology for getting everyone else to spend money cleaning up the mess the polluter keeps spilling out into the commons.
Every dollar spent trying to extract low-concentration CO2 from ambient atmosphere is probably better-spent trying to grab it from a high-concentration source (e.g. exhaust, smokestacks) before it gets diluted.