Dayton HV2123100G Large Junction Box compatible with 3AA18 3AA21

Dayton HV2123100G Junction Box

The Dayton HV2123100G is a large junction box designed for HVAC installations in recreational vehicles. It serves installers and maintenance technicians who need a reliable enclosure for wiring connections in mobile heating and cooling systems.

Compatible with 3AA18 and 3AA21 models

This box fits directly with Grainger part numbers 3AA18 and 3AA21, allowing it to integrate into existing assemblies without modification. It provides a secure mounting point that frees up surrounding space for conduit runs and other components.

Built for sustained vibration and temperature cycles

The enclosure maintains its seal and structural integrity under the continuous vibration and thermal expansion common in RV environments. It resists loosening and cracking over long service intervals better than light-duty alternatives.