The good news is if your service techs are worth their salt they are already collecting much of the needed system performance information including temperature drop across the coil and outdoor/indoor temperatures.
If an HVAC system is poorly designed, if substandard materials are used, if installers are improperly trained or inattentive to the details that go into a first-class installation, then very good equipment won’t work well, if at all.
Air & Energy tried a few of the earlier entries into home automation that centered on the thermostat, and they didn't turn out to be worthwhile.
For one thing, there was no upsell beyond the thermostat.
The best business lessons often come from personal experiences, applied to business. All of us have them every single day, but we seldom stop and connect the dots. Sipping coffee on a hotel balcony on the Côte d'Azur in the...