• New Hampshire Radiant Heat
• Plumbing Heating Cooling Contractors Association
• Radiant Panel Association
• Air Conditioning Contractors of America
• Propane Gas Association of New England
• National Propane Gas Association
• New England Fuel Instititute
• The Better Home Heat Council of New Hampshire, Inc.
• U.S. Department of Energy
• Heating Help
• Propane Education and Research Council
• Information regarding indoor air quality