Greenheck Project Profile Great River Energy Maple Grove, MN Engineering Firm: Dunham Associates Minneapolis, MN Mechanical Contractor: Doody Mechanical St. Paul, MN Greenheck Representative: TMS Johnson New Hope, MN Ensure employee safety by meeting UL requirements and NFPA Standards 80 and 105 for Life Safety Dampers. Help the contractor save time and expense associated with installation of dampers. Supply dampers to job site that supp

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