Incorrect tonnage selection voids manufacturer protection on 2000 square foot homes

https://sacramento-precision-hvac-affordable-sac-sac-ca5294.zenbloomer.com/posts/determine-replacement-readiness-by-analyzing-system-age-and-performance-metrics

For a 2000 square foot home in Sacramento, you typically need a 3.5 to 4 ton unit, but sizing incorrectly creates void risk that leaves you exposed to uncovered repair costs