# Calculating Effects of Added Insulation on Rate of Temperature Change

I have recently begun tracking the temperature data available from my Nest thermostat. Among other things, the hope is to use this data to measure the effectiveness of additional insulation and other miscellaneous energy saving projects performed around the house.

For instance:

| Timestamp         | Target Temperature | Current Temperature | Outside Temperature | Current Humidity | Outside Humidity | HVAC State | Auto Away |
|-------------------|--------------------|---------------------|---------------------|------------------|------------------|------------|-----------|
| 3/7/2016 7:37:59  | 58                 | 61                  | 54                  | 53%              | 43%              | FALSE      | 0         |
| 3/7/2016 8:08:00  | 58                 | 61                  | 57                  | 55%              | 41%              | FALSE      | 0         |
| 3/7/2016 8:38:00  | 58                 | 61                  | 57                  | 55%              | 41%              | FALSE      | 0         |
| 3/7/2016 9:08:00  | 58                 | 61                  | 60                  | 55%              | 36%              | FALSE      | 1         |
| 3/7/2016 9:37:59  | 58                 | 61                  | 60                  | 55%              | 36%              | FALSE      | 1         |
| 3/7/2016 10:08:00 | 58                 | 61                  | 63                  | 53%              | 34%              | FALSE      | 1         |


However (as you have probably surmised), this is more easily said than done as, among other things, the exterior temperature is never constant and therefore makes such calculations rather difficult.

Are there any logical conclusions one could make from the roughly 2,000 rows of data I have collected so far? I was hoping for pretty basic things like, "when outdoor temperature is below X degrees, heat loss is Y degrees per hour".