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8 hours ago history became hot network question
12 hours ago answer added Ecnerwal timeline score: 6
12 hours ago comment added Ecnerwal This needs considerably more detail to answer well. Carrier probably makes many models of Mini-Split with many different operating characteristics. While I doubt they have bothered to equal Mitsubishi's performance, they may be adeqaute for you needs or not, but without details we can't tell you. How cold is cold, what specific model you have, how cold that specific model operates, and your cost per kWh and gallon of oil would be a minimum starting point.
15 hours ago answer added manassehkatz-Moving 2 Codidact timeline score: 5
15 hours ago answer added DrMoishe Pippik timeline score: 4
16 hours ago comment added isherwood 2 seems like the obvious solution to me, but the nuances of airflow in your home will dictate what you need to do. You should also install a proper modern thermostat, even if it is "dumb". You need accuracy, at least. I'm not sure asking the internet is the right move here. Experiment and find what works best.
16 hours ago comment added isherwood What's "very cold"? Are you really at the lower bounds of the mini-splits' efficacy? I wouldn't expect that you'd need to bust out the ol' heap until below zero F, or darn close.
16 hours ago history asked J Kelly CC BY-SA 4.0