Finlandia / Harvia Part # GW535C Rough-In Box 3 1/2″ x 3 3/4″ x 9 1/4″ provides a purpose-built housing for F-1 sauna control systems, keeping electrical connections protected and organized behind the wall. Sized specifically at 3 1/2 inches by 3 3/4 inches by 9 1/4 inches, it offers enough interior space for conductors and terminations while still fitting comfortably into tight framing cavities. The rugged enclosure helps shield wiring from heat, moisture, and accidental damage, supporting long-term reliability in demanding sauna environments. Predefined mounting points and a form factor tailored to Finlandia and Harvia controls make layout and installation more predictable for electricians and installers. By using this dedicated rough-in box instead of a generic alternative, you help maintain safer routing, easier service access, and a clean, professional finish at the finished control panel.
Finlandia / Harvia Part # GW535C Rough-In Box 3 1/2″ x 3 3/4″ x 9 1/4″ provides a purpose-built housing for F-1 sauna control systems, keeping electrical connections protected and organized behind the wall. Sized specifically at 3 1/2 inches by 3 3/4 inches by 9 1/4 inches, it offers enough interior space for conductors and terminations while still fitting comfortably into tight framing cavities. The rugged enclosure helps shield wiring from heat, moisture, and accidental damage, supporting long-term reliability in demanding sauna environments. Predefined mounting points and a form factor tailored to Finlandia and Harvia controls make layout and installation more predictable for electricians and installers. By using this dedicated rough-in box instead of a generic alternative, you help maintain safer routing, easier service access, and a clean, professional finish at the finished control panel.