Electro-Comfort Hydronic Heating and Cooling The most efficient all-electric system in the industry A safe and sustainable solution for your decarbonization initiatives Heat COP >> 1 Operating temperatures >140F . . Recovery Summer - Waste heat Winter - Internal heat Shoulder Seasons - Economizer cooling . . . Learn more about Williams fan coils and air handlers in mixed use building applications and earn PDH credits at www.wfc-fc.com/comfort Made in the U.S.A. since 1916http://www.wfc-fc.com/comfort