

Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The 3M 7010389839 is a Diamond Grade retroreflective ventilation sign reading AIR SCUT CLOS, measuring 10 inches x 3 inches. It uses retroreflective sheeting technology to produce high-visibility letters and numbers for safety and emergency exit signage applications. The retroreflective surface returns light toward its source, making the sign readable in low-light and nighttime conditions without an external power source. Licensed HVAC technicians and facility maintenance professionals install these signs to meet code-required labeling in mechanical and ventilation systems.
This sign is suited for residential and commercial HVAC and mechanical room applications where air handling, duct shutoff, and ventilation control points must be clearly labeled. It is commonly applied to duct access panels, damper controls, and air handling unit enclosures. The compact 10 inches x 3 inches format fits standard equipment labeling locations. It is sold as a single pack with a minimum order quantity of one.
Designed as an OEM-style replacement and standard-use sign for ventilation and mechanical system labeling applications where retroreflective safety signage is required.
Installation is typically performed by licensed HVAC technicians or facility maintenance personnel. Apply only to clean, dry surfaces free of grease, dust, and loose material to ensure proper adhesion. Follow applicable local mechanical codes and OSHA labeling requirements when placing ventilation safety signs. Power down and lock out related equipment before working in confined mechanical spaces where this sign will be installed.
Thanks for subscribing!
This email has been registered!