The newest and most refined hydronic heating technology available anywhere in the world was on display this past March at the International Sanitation and Heating Exhibition in Frankfurt, Germany. The ISH Show, as it is known, runs every other year and attracts more than 2,000 exhibitors spread out over about 2.5 million square feet of floor space. If you want to glimpse the future of heating technology in the United States, this is the place to see it. Hydronic heating is by far the most common method of heating in Europe. Combine this with higher fuel costs, rigid emissions standards, and a seemingly universal commitment to delivering comfort, and the stage is set for some innovative products. Super Efficiency A readily