Altren's president Charles Lazin
lectures on Alternative Energies and GeoExchange systems:

2015
April 16th, AIA Long Island Chapter, Uniondale, NY
AIA LI Chapter, Annual Product Fair, Uniondale NY

2010
August, AIA, Poughkeepsie, NY
Half Moon Seminar at the Civic center 4 points

2009
August, AIA, Fort Washington, PA
June, New York Solar Energy Society, Port Jervis NY
May, AIA, Long Island, NY
February, Port Authority NY and NJ
January, AIA Queens Botanical Garden

2008
June, Clearwater Festival
October, AIA Manhattan
November, AIA Westchester

2007
- February 18, 2-3:30 PM Mohonk Preserve

2006
- June 2006, Clearwater Festival, Croton Point Park, NY
- May 20, Rosendale Energy Expo 2006, Rosendale NY ( see the flyer )
- April 19, Dutchess County Community College, Poughkeepsie, NY
- February 18, 2-3:30 PM Mohonk Preserve

2005
- November 2005, Cragsmore Public Library
- June 2005, Clearwater Festival, Croton Point Park
- April 2005, Rosendale Green Building & Renewable Energy Expo

2004
- December 2004, Dutchess County Community College
- October 2004, Center for Hudson Valley Sustainable Living Communities Networks
- June 2004, Clearwater Festival, Croton Point Park NY
- May 2004, at Sierra Club Atlantic Chapter Mid Hudson Valley, Poughkeepsie
- May 2004, at the IBM Poughkeepsie Environmental Awareness Day Event
- April 2004, at the Marist College, Poughkeepsie
- April 2004, Hudson Valley Technology and Commerce group in Woodstock

List of Articles:
- Upstate House, July 2005
- Catskill Mountain Region GUIDE, June 2005
- Chronogram, May 2005
- Hudson Valley Green Times, Kick the Fossil Fuel Heating Habit for Good
- Upstate House, December 2003