where it can absorb heat from fan coil units installed to provide latent, and sensible space cooling. The cold water drawn from Lake Ontario's deep layer in the Enwave system is not returned directly to the lake once it has been run through the heat exchange system. Instead, water is pumped to the City's water filtration plant for treatment and distribution to residential and commercial users. Sea water air conditioning This version is also known as ocean water cooling. The InterContinental Resort and Thalasso-Spa on the island of Bora Bora uses a seawater air conditioning (SWAC) system to air condition its buildings. The system accomplishes this by passing cold seawater through a heat exchanger where it cools freshwater in a closed loop system. This cool freshwater is then pumped to buildings and is used for cooling directlyno conversion to electricity takes place. Similar systems are also in place in The Excelsior hotel and The Hong Kong and Shanghai Banking Corporation main building in Hong Kong, and at the Natural Energy Laboratory of Hawaii Authority. Salt water air conditioning systems have been used in Sydney's Circular Quay and prominent buildings within the harbour since the rise of commercial air conditioning systems in the 1960s. These include the heritage-listed AMP 'Palm Cove' Building (constructed 1962) and the Sydney Opera House. The InterContinental Resort is the largest seawater air conditioning system to date, though there are several other, larger systems being planned. Honolulu Seawater Air Conditioning was a project intended to use seawater air conditioning to deliver renewable cooling to commercial and residential properties in the downtown Honolulu area. On December 19, 2020, Honolulu Seawater Air Conditioning announced it was ending its development and would end operations by the end of January 2021. Honolulu Seawater Air Conditioning is majority owned by eBay founder Pierre Omidyar's Ulupono Initiative. See also Sea water air conditioning Notes References External links From Lake Depths, a Blast of Cool for Consumers Cornell University Lake Source Cooling overview and details of how it works Geocean has performed the design and installation of a SWAC system for the Brando Hotel in French Polynesia. Makai Ocean Engineering has designed SWAC systems in Bora Bora (installed), Kona (installed) and Honolulu, Hawaii, la Reunion, Curaçao, Bahamas, and DWSC systems at Cornell University and Toronto (both installed). Marine energy Heating, ventilation, and air conditioning Renewable energy