411. Breach of covenant for quiet enjoyment.

The covenant for quiet1 enjoyment operates according to its terms to secure the tenant, not merely in the possession, but also in the enjoyment of the premises for all usual purposes. Thus, where the ordinary and lawful enjoyment of the demised premises is substantially interfered with by the acts or omissions2 of the landlord or those lawfully claiming under him3, the covenant is broken, even if neither the title to, nor the possession of, the land is otherwise affected4. Whether this interference has taken place is, in each case, a question of fact5. The covenant may be broken by