The HERS Index is a scoring system established by the Residential Energy Services Network (RESNET). A house built to code standards would score "100." A house built better than the code standards would move toward "0." The more efficient the house, the less enery it requires to heat, cool, maintain hot water, operates appliances, etc.
The LANDMARK System achieves this by virtually eliminating all air infiltration, using superior roof and wall insulation and providing premium Weather Shield windows and doors.