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Item Fuel Cost Comparison Chart(North Dakota State University, 2002) Hellevang, Kenneth; Hofman, VernItem Keep Your Home Healthy(North Dakota State University, 2004) Hellevang, KennethItem Sandbagging for flood protection(North Dakota State University, 1997) Maher, George G.; Hellevang, KennethItem Sandbagging for Flood Protection(North Dakota State University, 2011) Hellevang, KennethItem No-cost, Low-cost Home Energy-saving Tips(North Dakota State University, 2008) Pedersen, Carl; Hellevang, KennethItem Air-to-Air Heat Exchangers For Healthier Energy-efficient Homes(North Dakota State University, 2009) Hellevang, Kenneth; Pedersen, CarlItem Remove Mold for a Healthy Home(North Dakota State University, 2009) Hellevang, KennethItem Farmstead Energy Audit(North Dakota State University, 2008) Nowatzki, John; Scherer, Tom; Hellevang, Kenneth; Pedersen, CarlItem Insulation and Air Infiltration Levels Using an Infrared Thermometer(North Dakota State University, 2008) Pedersen, Carl; Hellevang, KennethItem Remove mold for a healthy home(North Dakota State University, 2001) Hellevang, Kenneth