In New York City, it can be hard for some people to keep the heat on inside their own apartments. But a start-up is trying to help apartment dwellers fix the problem.

Every year, authorities in New York City receive more than 200,000 heating-related complaints. Building managers are required by law to maintain minimum temperatures of 68 degrees during the day and 55 degrees at night, but it doesn't always happen. Many apartment tenants are left shivering in their homes anyway.