411020-S&P 20″ X 20″ series 411 automatic exhaust damper. Max velocity of 2000 FPM. December 20, 2019 | No Comments 411020-S&P 20″ X 20″ series 411 automatic exhaust damper. Max velocity of 2000 FPM. Add To Quote Request This product is already in quote request list View Your Quote Cart SKU: AAIS-SP-411020-S&P 20" X 20" series 411 automatic exhaust damper. Max velocity of 2000 FPM. Category: S&P SQD Direct Drive Square Inline Centrifugal Duct Fans Description Description S&P 20″ X 20″ series 411 automatic exhaust damper. Max velocity of 2000 FPM. Related Related products 2727.1-S&P speed controller. 5 Amp, up to 1/3 hp, 120V. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart SQD8251CS-S&P SQD8 square inline direct drive duct fan. 1/4 Hp, 230/1/60 motor. 1740 RPM. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart SQD12251AS-S&P SQD12 square inline direct drive duct fan. 1/4 Hp, 115/1/60 motor. 1120 RPM. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart 411014-S&P 14″ X 14″ series 411 automatic exhaust damper. Max velocity of 2000 FPM. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart Related