📶 You Never Want "No Signal" in an Emergency
Here’s a sobering fact from the National Emergency Number Association: An estimated 240 million calls are made to 9-1-1 in the U.S. each year. In many areas, 80% or more are from wireless devices.
Now, think about the wireless coverage in a concrete or glass-clad building. Concrete is great for hurricanes; bad for cellphone service. Similarly, low-e glass is excellent for energy-efficiency; lousy for cellular signals.