Hi , What is the heat block % of the two options in Cellular shades I am looking at LF 19370247. ?

Thank you for your question. The Levolor custom cellular shades offer different options that to fit your needs. The 19370247 is one of our single cell light filtering options. Due to its construction the cellular shades are able to provide you with insulation against heat/cold. We also offer a double cell in other collections that can increase this factor. Please reach out to us at 1-800-538-6567, if you would like to speak to one of our product specialists. Our business hours are Monday through Friday 9:00 am to 6:00 pm and Saturday 10:00 am to 2:00 pm eastern standard time. - Kimberly