Exhaust hoods can normally draw up to 30" away. If exhaust hoods can not be designed to adequately capture fumes from the tanks, a push air system may be the solution. The push air system enhances the operation of a typical exhaust ventilation system by literally pushing the air to within the reach of the exhaust hood. In addition, the push-pull system:

• reduces exhaust volume by up to 50%; reducing the cost of the exhaust system

• reduces heating and cooling costs
  
• captures drag-out fumes
  
• improves worker safety by keeping fumes awayfrom workers

Duall‘s unique system is based on low volume/high pressure design. The push air volume is only about 1 to 3% of the exhaust air volume. Because of the low volume of push air required, the push pipe hoods (headers) are smaller and less apt to be in the operators way.