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The SLANT-FIN 57188309000 is an inside corner cover piece designed for use with the Multi/Pak 88 baseboard heating system. This one-piece, snap-on component provides a clean, finished look at inside corners where two runs of baseboard meet at a 135-degree angle. It is finished in Nu-White to match standard Multi/Pak 88 enclosures. Plumbers, HVAC technicians, and heating contractors install this trim piece as part of a complete baseboard heating enclosure assembly in residential and light commercial applications. The component fills up to 2.5 inches of gap on each wall, accommodating minor variations in wall alignment without custom cutting or fabrication.
This inside corner is suited for deluxe residential and light commercial baseboard heating installations using the Multi/Pak 88 enclosure system. It is compatible with Slant/Fin H-Series heating elements designed for hot water or steam distribution. Typical install scenarios include perimeter heating layouts where baseboard runs transition at interior wall corners, including locations where wall space is limited and higher heating outputs are required. The 135-degree angle (equivalent to a 45-degree offset) fits the most common interior corner geometry found in residential construction.
Designed for use with the Slant/Fin Multi/Pak 88 baseboard heating enclosure system, including configurations using H-Series heating elements for hot water or steam applications.
This trim component is typically installed by licensed HVAC technicians or plumbers completing a baseboard heating enclosure run. Shut down the heating system and allow all components to cool before handling enclosure parts near active heating elements. The snap-on design requires no special tools, but ensure the baseboard enclosure sections are properly aligned and secured before attaching the corner piece. Follow local mechanical codes for baseboard heating clearances and enclosure installation requirements.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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