I dug the trenches per the contractor's specs and he installed the loops. There are 5 trenches. Each is 150 f. long each, 5 f. wide, dug to 5 1/2" f. deep, then 6" of screened clay-containing material on the bottom, then 800 f. of 3/4" Charter Plastics Geothermal tubing in loops that touch but do not overlap, then 1 f. of the screened material on top, then backfilled. The site is in Northeast Pennsylvania. The ground has a high clay content. I thought I was getting 5 tons but I'm seeing numbers on the internet in terms of number of feet of tubing per ton which causes me to think I have more than 5 tons. Does 5 tons sound right or do I have more? If I have more, but only go with a 5 ton unit, is that a problem?