Delaware Code Title 16. Health and Safety § 6602D. Buildings subject to testing

(1) Any structure or portion thereof which is occupied as, or designed or intended for occupancy as a residence for 2 or less families, including multifamily, single family, and townhouse dwellings, is excluded from the testing requirements in § 6603D of this title.

(2) All other residential buildings, including hotels, are subject to the required testing only for mechanical rooms and common use areas, including stairs, hallways, and lobbies.