The new Four Seasons resort under construction in Napa Valley required an underground network of nearly a mile of pipe to provide hydronic hot and cold water to the new complex. Not just a luxury Four Seasons hotel, the resort, which is scheduled to open this fall, will have 85 guest rooms, 20 private residence villas and a six-acre private vineyard.

The cooling and heating water distribution lines for every building had to be installed quickly in order to meet tight construction schedules, which ultimately allowed the crew to beat the widespread fires that suddenly enveloped the area during the summer of 2017.

The contractor, Greenberry Industrial (Vancouver, Washington), used about 5,000 feet of high-density polyethylene (HDPE) pipe in 2-, 4-, 6- and 8-inch diameters for the heating and cooling system.