Door knocking devices , in addition to door bells, alert a person who is deaf or hard of hearing that someone is at the door. The device is hung on the inside of the door and flashes a light when a visitor knocks. Protruding or low hanging objects , such as exterior porch lights or hanging baskets should be removed or relocated whenever possible to prevent people with visual impairments from injury. Removing objects most likely can be accomplished by maintenance personnel with little or no cost. Filters in heating and ventilation systems should be changed frequently to keep dust and mold from adversely affecting people with environmental illness or respiratory illnesses.
Costs vary depending on the size of the filter.
Swing clear hinges increase the width of the door. Speaker phones from the lobby to an apartment increased security for every tenant. The system ithose who are blind or elderly. Some stores may have do it yourself kits for less. Pest controls used for planting, for control of insects and lawn care should be chemical-free.