Incorrect tonnage selection voids manufacturer protection on 2000 square foot homes

https://precision-five-star-hvac.theburnward.com/preventive-tune-ups-save-sacramento-homeowners-thousands-on-central-ac-replacement-costs-1

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