Sorry duplicate post.

With the Ecobee thermostats you can down load your temperature data.

The data is recorded every 5 minutes. Thus you can chart: 1. Temps inside and out (also remote sensors if you have them) 2. Humidity inside and out 3. Wind speed 4. Furnace commands and set points. I can set our house to heat at a constant rate all day long (aka BTU input being constant). Attached it a 2 day chart of doing this.

You can see there is little if any thermal leg between the outside temp and inside temp changes as the ICF manufactures advertise. I have seen Nurdura claim up to a 6 hour shift.

House is a Build Block house with 6" Global Block on main floor and 6" Standard Block in a walkout basement that is 50% exposed.