; (2) to promote the deployment of renewable energy in dwelling units that are occupied by low-income persons; (3) to ensure healthy indoor environments by enhancing or expanding health and safety measures and resources available to dwellings that are occupied by low-income persons; and (4) to disseminate new methods and best practices among entities providing weatherization assistance. (b) Financial assistance The Secretary shall, to the extent funds are made available, award financial assistance through a competitive process to entities receiving funding from the Federal Government or from a State through a weatherization program under section 413 or section 414, or to nonprofit entities, to be used by such an entity— (1) with respect to dwelling units that are occupied by low-income persons, to— (A) implement measures to make such dwelling units weatherization-ready by addressing structural, plumbing, roofing, and electrical issues, environmental hazards, or other measures that the Secretary determines to be appropriate; (B) install energy efficiency technologies, including home energy management systems, smart devices, and other technologies the Secretary determines to be appropriate; (C) install renewable energy systems (as defined in section 415(c)(6)(A)); and (D) implement measures to ensure healthy indoor environments by improving indoor air quality, accessibility, and other healthy homes measures as determined by the Secretary; (2) to improve the capability of the entity— (A) to significantly increase the number of energy retrofits performed by such entity; (B) to replicate best practices for work performed pursuant to this section on a larger scale; and (C) to leverage additional funds to sustain the provision of weatherization assistance and other work performed pursuant to this section after financial assistance awarded under this section is expended