- Every 5 minutes the thermostat communicates with the cloud. This is 12 messages an hour.
- Each message is about 1 Kb.
- 1 Kb x 288 messages (12/hour times 24 hours in a day)
- About 288 Kb a day.
- 288 Kb x 30 days ~ 8.4 Mb/month (This is a bit on the high side - also is dependent on how often you access the thermostat. The more often well causing the thermostat to send messages more frequently).