Modular liquid based heating and cooling system

A modular liquid based heating and cooling system for providing heating and air conditioning in a building, comprising:

• a riser chilled liquid supply line configured to receive a flow of fresh chilled liquid, a riser chilled liquid return line configured to receive a flow of used chilled liquid, a riser heated liquid supply line configured to receive a flow of fresh heated liquid, and a riser heated liquid return line configured to receive a flow of used heated liquid;
• a flow control device in fluid communication with the riser chilled liquid supply line, the riser chilled liquid return line, the riser heated liquid supply line, and the riser heated liquid return line, wherein the flow control device comprises a modular housing, and wherein the modular housing comprises:
• a plurality of first control valves in fluid communication with the riser chilled liquid supply line and the riser heated liquid supply line, wherein the plurality of first control valves is configured to receive the flow of fresh chilled liquid from the riser chilled liquid supply line and configured to receive the flow of fresh heated liquid from the riser heated liquid supply line;
• a plurality of second control valves in fluid communication with the riser chilled liquid return line and the riser heated liquid return line, wherein the plurality of second control valves is configured to receive the flow of used chilled liquid and direct the flow of used chilled liquid toward the riser chilled liquid return line, and wherein the plurality of second control valves is configured to receive the flow of used heated liquid and direct the flow of used heated liquid toward the riser heated liquid return line;
• a plurality of terminal device supply lines, wherein each terminal device supply line of the plurality of terminal device supply lines extends from a corresponding first control valve of the plurality of first control valves;
• and
• a plurality of terminal device return lines, wherein each terminal device return line of the plurality of terminal device return lines extends from a corresponding second control valve of the plurality of second control valves;
• a plurality of terminal devices, wherein each terminal device of the plurality of terminal devices is in fluid communication with a corresponding terminal device supply line of the plurality of terminal device supply lines and a corresponding terminal device return line of the plurality of terminal device return lines;
• and
• a controller communicatively coupled to the plurality of first control valves and the plurality of second control valves and configured to send instructions to the plurality of first control valves and the plurality of second control valves to adjust a respective position of each first control valve of the plurality of first control valves and a respective position of each second control valve of the plurality of second control valves, wherein the plurality of first control valves and the plurality of second control valves cooperate to direct the flow of fresh chilled liquid or the flow of fresh heated liquid through the plurality of terminal device supply lines and the plurality of terminal device return lines, such that each terminal device of the plurality of terminal devices receives the flow of fresh chilled liquid or the flow of fresh heated liquid based on cooling or heating requirements of each terminal device.