Founded in 1960 by Howard Knaack in a one-room shop in Crystal Lake, Illinois, Knaack LLC invented and popularized the modern jobsite storage box. For HVAC contractors running pickup-based service rigs or mixed pickup-and-van fleets, Knaack's signature red Jobmaster, Storagemaster, and Rolling Work Station boxes provide secure, weather-resistant storage for expensive tools, gauges, vacuum pumps, recovery machines, and stock parts. The steel construction, gas-piston lid assists, and Watchman III padlock protection make them a standard fixture on HVAC service vehicles and multi-day commercial projects.
Beyond the flagship jobsite boxes, Knaack offers truck-mounted chests, stackable storage systems, field station rolling desks, and accessories like shelving, drawers, and cargo-tie-downs. Their Monster Box line is sized for crews that need to secure a full rig of tools overnight on a construction site. For HVAC companies with a fleet of pickups that service both residential and light-commercial work, a Knaack chest bolted behind the cab or mounted in the bed creates a truck-based parts room that keeps inventory controlled and shrinkage low.
Knaack has been owned since 2012 by ProDriven Global Brands (formerly WernerCo), which also owns the sister brand Weather Guard. The two brands share distribution through contractor-supply channels, big-box retailers like Home Depot and Lowe's, and upfitter dealers, giving HVAC shops easy access to standardized storage across their truck and van fleet. With more than 65 years of jobsite heritage, Knaack remains the default pick when a contractor needs a box that survives daily abuse and years of winter salt.