On January 1. 2019, Deane Company began leasing office space from Blossom Building Associates for a term of 10 years. The office space includes the use of office equipment and computer equipment. In addition, Blossom will provide maintenance of all items of equipment included in the agreement and basic repairs and maintenance of the office as needed (e.g., air conditioning, cleaning services, and elevator repairs). The maintenance is included in the annual lease payments. On May 1, 2020, Blossom installed a separate air filtration system in Deane's office space. Deane has control over operating the air filtration system. Blossom did not change the monthly rent. Which of the following is a non-lease component?

Office space

Office equipment and computer equipment

Maintenace of common facilities

Separate air filtration system