U.S. Geothermal Heat Pump Market revenue will surpass $2 billion by 2024: Global Market Insights, Inc. Sellbyville, Delaware, Nov. 19, 2018 (GLOBE NEWSWIRE) -- The U.S. Geothermal Heat Pump (GHP) Market is poised to cross USD 2 Billion by 2024, as reported in the latest study by Global Market...