noun which may take the genitive case particle 'no'
for home use; residential
Used attributively to describe products, equipment, or facilities intended for residential (as opposed to commercial or industrial) use.
このエアコンは住宅用に設計されています。
This air conditioner is designed for residential use.
住宅用火災警報器の設置
Installation of residential fire alarms has become mandatory.
家庭用 also means 'for household use', but often emphasizes family or domestic settings, while 住宅用 focuses on the dwelling itself.
Compound of 住宅 (じゅうたく, 'residence') + 用 (よう, 'for use').