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Join us for help answering your questions about reviewing, matching, and submitting your ENERGY STAR and Indoor airPLUS certified homes using the Homes Online Submittal Tool (HOST). The quarterly reporting process uses an application programming interface (API) to transmit specific data (such as builder and rating company name, rating type, and zip code) directly from a source database (e.g., the RESNET Registry) for each ENERGY STAR and Indoor airPLUS certified home that is uploaded. When Providers log in to HOST most of their certified homes information is pre-populated based on this data transfer.