I am in Lower Michigan and I have buried 400 ft of 6 pipe trench. I was planning on putting in a 3.5 ton furnace per my houses needs. However, I have a great opportunity on a used 5 ton furnace. Will this be a problem with my loops. It is a waterfurnace with 2 stage. I am assuming that I should not go this big b/c my house need is not that great and I am not sure if my loops can handle it. I am assuming it is a 5 ton furnace it is a waterfurnace ATH057D100CRE. Any thoughts.