411028-S&P 28″ X 28″ series 411 automatic exhaust damper. Max velocity of 2000 FPM. December 19, 2019 | No Comments 411028-S&P 28″ X 28″ 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-411028-S&P 28" X 28" series 411 automatic exhaust damper. Max velocity of 2000 FPM. Category: S&P SQB Belt Drive Square Inline Centrifugal Duct Fans - 3 Phase Description Description S&P 28″ X 28″ series 411 automatic exhaust damper. Max velocity of 2000 FPM. Related Related products 611035-S&P 35″ X 35″ series 611 automatic exhaust damper. Max velocity of 2250 FPM. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart MGSQB78-S&P motor safety guard (cover). Not mounted. SQB 07, 08. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart MGSQB18-S&P motor safety guard (cover). Not mounted. SQB 18. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart MGSQB15-S&P motor safety guard (cover). Not mounted. SQB 15. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart Related