To fund Healthy Homes and Weatherization Cooperation Demonstration grants in up to 5 communities that provide housing interventions in lower-income households that are served by both HUDs Healthy Homes Production (HHP) program and DOEs Weatherization Assistance Program (WAP) to determine whether coordination between the programs concerning the implementation of healthy homes remediation activities and energy conservation measures achieves cost-effectiveness and better outcomes in improving the safety and quality of homes. The following are the major goals and objectives of this NOFO: (1) Demonstrate effective strategies for coordination between HUDs HHP and DOEs WAP programs that maximize program efficiencies and benefits to occupants.(2) Reduce WAP deferrals through coordination with HHP programs.(3) Demonstrate sustainable models of inter-program cooperation, including data sharing, reporting, and targeting/recruiting clients.(4) Demonstrate effective models for the sustainable financing of coordinated healthy homes/weatherization interventions.(5) Support the collection of data to evaluate the housing interventions conducted through inter-program coordination (e.g., program cost efficiencies that can be achieved, improvements in indoor environmental quality, improved health outcomes, and additional safety benefits to households).