Dev, the mice squirrels etc. will make a nest in Dow rigid foam too.

The only time I used hot wire cutting for rigid foam was when I wanted to cut 2" X 12" boards from 12" X 24" X 12' long billets and it wouldn't work on my table saw. I used a Variac (auto transformer) for the power supply.

I would cut anything I could handle sizewise on the table saw BUT will tell you that one of the most exciting times in my life was when I was left holding a small piece of 1" foam in my hands that just before the kick back and big boom had been a 4' X 8' sheet I was ripping (with the fence in place). It cuts so easy I was letting it fly thru the cuts - don't do that, cause foam can hurt you when it gets up to speed.