24 Hour Interior Winter Temperature Cycle

For a building with heating, this graph shows an example of rate-of-heat loss vs. exterior night time temperature.

An understanding of an entire building envelope can be developed by collecting data on each floor and comparing heat loss and heating curves.

Overnight thermostat set at 60 degrees from 10pm to 6am; auto change at 6am to 68 degrees.

Blue was the coldest night, orange and gray were successive nights during a warming trend.