Limit dates?

I replaced my furnace 3 months ago. I went from an 80% efficient 80 kBTU furnace to a 97% 60 kBTU one. I’m only really interested in heating data after the date I installed my new furnace. Just wondering if my situation could be taken into account, because I think it’s a common scenario.

If you email me your thermostat serial number and the cutoff date I can delete the old data for you. I don’t have any automated way of handling this right now but it doesn’t take me very long to do.