Incorrect tonnage selection voids manufacturer protection on 2000 square foot homes

https://precision-anytime-hvac.cavandoragh.org/operating-your-air-conditioner-within-three-minutes-establishes-manufacturer-warranty-eligibility-standards-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