My house is 2000 sq.ft., it has several very large windows in both living rooms. All the windows have "heat-blocking" shades on them, but the temperature in the house stays around 80 degrees during the day in the summer, even though the AC runs continuously. I live in Dallas, Tx, where it is hot in the summer. The A/C system is new, and sufficiently large, according to the installer. Do you think the heat is being transferred to the inside of the house by the glass windows, regardless of the shades? In the PM when the sun goes down, the temperature drops quickly in the house. What are my options? Does the heat blocking "window film" really work? What about "sun screens"?
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