We recommend one eero for roughly every 1,000 square feet. While a single eero will outperform your current router, eeros are designed to work best as a system. Each home is different, but a set of three eeros covers the typical U.S. home (~2,000 – 4,000 sq ft).
You can wirelessly connect multiple eeros to cover any size or shape of home. If your home happens to have Ethernet wiring, you can also take advantage of those connections for some or all of your eeros. If your needs change or you decide to extend your coverage area, you can always add more eeros.