The following links will redirect you off the IGSHPA Web site. IGSHPA is not responsible for the accuracy of the information on these sites.

• Database of State Incentives for Renewables & Efficiency (DSIRE)
• US Department of Energy Consumer Energy Tax Incentives

• Build.com (The Building and Home Improvement Directory)
• Buildings.com (The Source for Facilities Decision-Maker)
• HomeIdeas.com (The Ultimate Research Tools Your Home Project)
• Institute for Research in Construction (IRC)

• Geo SUN NRG
• OG+E (Oklahoma City area)
  (Check with your local utility - many have a calculator on their Web site)

• Alliant Energy Integrated Services
• DOE Energy Efficiency and Renewable Energy (EERE)
• Deep Heat Mining Project (DHM)
• Ecoiq.com (Energy Conservation & Renewable)
• Edison Electric Institute (EEI)
• Electric Power Research Institute (ERPI)
• Energy Research Centre of the Netherlands (ECN)
• Energy Star
• The Association of Energy Engineers (AEE)
• The Electrification Council (TEC)

• BuildingGreen.com (Publishers of Environmental Building News)
• Center of Excellence Sustainable Development
• Global Network of Environmental & Technology (GNET)
• Idaho National Engineering and Environmental Laboratory (INEEL)
• International Institute for Sustainable Development (IISD)
• National Center for Appropriate Technology (NCAT)
• The EcoGateway (Your Guide to Sustainability Online)
• The Envirolink Network (Online Environmental Community)

• Oklahoma State University - Building and Environmental Thermal Systems Research Group
• Oak Ridge National Laboratory - Building Technologies Research and Integration Center
• Zero Energy Building Research Alliance

• Air Conditioning Contractors of America (ACCA)
• American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
• Air conditioning and Refrigeration Institute (ARI)
• Energy User News (Online Newspaper)
• Geothermal Exchange Organization (GEO)
• IRC Information Service (Bibliography of Papers on GHPs/ Also available in French)
• National Rural Electric Cooperatives Association (NRECA)
• Preston's Guides (HVAC Manufacturer's Specifications)
• HVACR News (The Air Conditioning, Heating & Refrigeration News/ Online Newspaper)

• Alabama Power Company Heat Pump Training Center
• GeoExchange Design Principles Seminar
• Geothermal Systems for Water Source Heat Pumps and Central Systems
• University of Wisconsin Design of Geothermal Heat Pump Systems

• Building Life Cycle Cost Program (BLCC) does federal CFR computations
• Elite Software (HVAC design)
• Ground heat exchanger design tool for Residential (CLGS)
• Wrightsoft (GHP system design software)
• Software Advice (site that reviews and compares construction software)

• Alliant Energy Geothermal Information Office
• Canadian Earth Energy Association (CEEA)
• Environmental Protection Agency (EPA)
• EPRI/ Geothermal Heat Pump (EPRI/ GHP)
• Geothermal-The Energy Under Our Feet
• International Energy Agency (IEA) Heat Pump Centre
• International Geothermal Association
• U.S. Department of Energy, Geothermal Technologies Program

• Hybrid ground-source heat pumps, Energy Center of Wisconsin
• OPTIMIZATION OF HYBRID GEOTHERMAL HEAT PUMP SYSTEMS
• Optimization of a Hybrid Ground Source Heat Pump using the Response Surface Method, Korea University
• Optimal Sizing of Hybrid Ground-Source Heat Pump Systems That Use a Cooling Pond as a Supplemental Heat Rejecter—A System Simulation Approach
• SIMULATION AND OPTIMAL CONTROL OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS

• IGSHPA Chinese Chapter