SEMS offers a comprehensive range of commercial walk‑in coolers and freezers in partnership with CrownTonka, one of the most respected names in the industry. CrownTonka’s long‑standing reputation for durability, thermal performance, and dependable construction elevates every unit we supply. Walk‑ins are available in both indoor and outdoor configurations, supporting the needs of grocery stores, convenience stores, restaurants, distribution centers, and controlled‑environment facilities. Each system features CrownTonka’s signature polyurethane‑foam panel construction—4" to 6" insulation cores that deliver significantly higher insulating capacity than styrene or XPS alternatives—encased in a rugged metal skin with cam‑action locks for fast, precise assembly. For outdoor applications, factory‑assembled one‑piece units are available and backed by CrownTonka’s 20‑year structural warranty, ensuring long‑term reliability in demanding environments.