Mini Split Core Drilling

Ductless mini split heat pump installations require a penetration through an exterior wall for the refrigerant line set, condensate drain, and electrical wiring that connect the indoor head unit to the outdoor condenser. REDCORE provides core drilling for mini split installations throughout Massachusetts, creating clean, precisely positioned holes through foundation walls, framed walls with exterior sheathing, concrete block walls, and brick veneer for the line set bundle. The standard penetration is a 3-inch to 4-inch diameter hole drilled at a slight downward pitch toward the exterior to allow condensate drainage.

Proper mini split core drilling ensures the line set passes through the wall cleanly, the hole is positioned at the correct height behind the indoor unit, and the slight pitch prevents water from draining inward. REDCORE operators position each hole precisely according to the HVAC technician's specifications, accounting for indoor unit mounting height, outdoor unit location, and line set routing. We drill through poured concrete, concrete block, brick, stone, and composite wall assemblies with equal precision.

Our mini split core drilling service is fast and clean, typically completing a single penetration in under 30 minutes. We serve homeowners installing mini splits for supplemental heating and cooling, HVAC contractors handling multi-head installations, and property managers upgrading rental units with ductless systems. Wet drilling with slurry containment keeps the interior clean, and the finished hole is smooth and ready for the line set sleeve.