Cool sounding system, Sync. From the numbers I crunched it looks like it works much better for you on LI than it would for me in Maine. At first I thought I'd be saving 200 gallons of oil a year, but it ended up more like 100. I was looking at two different systems, one was two 4' by 8' panels, the other was 30 vac tubes. Both called for an 80 gallon tank.