
The specific clause in the lease agreement that prohibits odors from traveling between apartments in the Queens co-op is the "no nuisance" or "quiet enjoyment" clause. This clause ensures that residents have the right to the peaceful enjoyment of their homes without disturbances, which can include offensive odors like cigarette smoke.

The co-op management has taken several measures over the past four years to address the smoke issue with the elderly downstairs neighbor. They have sent her notice after notice regarding the issue and even threatened to bring an eviction case against her. Recently, they reached a settlement with her, wherein the owner of her apartment would install a commercial smoke abatement machine. However, it has been 10 weeks since the agreement, and the machine has not been installed yet.

The delay in the installation of the commercial smoke abatement machine could be due to several reasons1. It's possible that the owner of the apartment is facing logistical issues, such as difficulty in sourcing the machine or finding a suitable contractor to install it. There could also be scheduling conflicts or budgetary constraints that are causing the delay. Without more specific information, it's difficult to determine the exact cause of the delay. However, it's important to keep communicating with the co-op's management to ensure that the issue is resolved as soon as possible.