I live in a duplex that we are converting into a single family house. We currently live on 2nd/3rd floor and have a Verizon Fios Gigabit connection wireless router in our 2nd floor bedroom.

We are moving into the first floor and the tv i put in the first floor bedroom is getting terrible wifi.

What is my best option for expanding wifi to the first floor? I cant use a power outlet extender cause the first floor is on a separate breaker box.

What system would work best to extend my wifi?