Encasement assembly for installation of sub-surface refrigerant tubing in a direct exchange heating/cooling system

A method of installing sub-surface refrigerant tubing in a direct exchange heating/cooling system comprising:

• positioning at least a distal portion of the refrigerant tubing in an encasement tube including a main body portion having a flat upper end and a base, and a nose extending from the base of the main body portion;
• positioning a trimmie tube attachment piece in the encasement tube so that an upper portion of the trimmie tube attachment piece extends above the flat upper end of the encasement tube and a lower portion of the trimmie tube attachment piece is located below a point disposed a recess distance below the flat upper end of the encasement tube;
• filling the encasement tube with a fill material until it reaches the point, the fill material having a flat upper surface located at the point;
• releasable attaching a trimmie tube to the trimmie tube attachment piece with a distal end of the trimmie tube located between the flat upper end of the encasement tube and the flat upper surface of the fill material;
• placing the encasement tube in a sub-surface location;
• and
• advancing grout material through the trimmie tube.