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DuraVent FasNSeal 7" x 18" 316L Stainless Steel Vent Length 31in 5" larger than inner wall h63 5" larger than inner wall Type Thermal Efficiency % Reduction in System Sizing High Efficiency Unit Heater 80% 32% Convectional Unit Heater 62% 48% Assuming that the ASHRAE heat loss for a building is 100 CONSEQUENTIAL Size (Diameter) 7" A 16” B 18" Technical Dimensions
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