Setting hood at tunnel entrance is effective and economical method. Using numeral simulation method, two kinds of hood mechanics character under deadweight and aerodynamic load were analysed. The stress concentration field on the hood and the magnitude of the stress caused by aerodynamic loading was defined. As a part of the Hood River Conservation Project (HRCP), homes were monitored to measure electrical energy use on a min basis. The total electrical load, space-heating load, water-heating load, woodstove heat output, and indoor temperature were monitored for one full year both before and after retrofit. Special. Full line of equipment built to provide easy operation, maximum uptime. Equipment for Premium Blown Stretch Films and machinery for load containment.