Viking's Freedom® Model VK486 Residential Horizontal Sidewall Sprinkler is cULus Listed with a flow rate of 13 gpm (49.5 L/min) for a 16 x 16 ft (4.9 x 4.9 m) room size. This is the lowest UL Listed flow rate possible for NFPA 13D or 13R residential sprinkler systems requiring a 0.05 gpm/ft 2 (2.04 mm/min) minimum design density. Built from Viking’s patented flow shaper platform, the VK486 sprinkler also offers larger coverage areas including 20 x 20 ft (6.1 x 6.1 m) and 16 x 22 ft (4.9 x 6. 7 m). In each of its UL Listed areas of coverage, it provides the lowest flow rates available in the industry.