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Lennox GCS09411/413/461/463/511/513/651/653 — curb adapter & replacement fit

Lennox GCS9 series single package DX cooling and gas heating rooftop unit cutaway
Photo: Lennox Industries Inc.

The Lennox GCS09411/413/461/463/511/513/651/653 mounts on a roof curb with an overall footprint of 77″ × 40″. SMARTCurb can compile a fabrication-ready curb adapter between this unit and hundreds of other rooftop units — replacement without touching the roof deck.

Curb footprint: 77″ × 40″ (L × W)

Covered models: GCS09411/413/461/463/511/513/651/653

Lennox GCS09411/413/461/463/511/513/651/653 roof curb pattern drawing — SMARTCurb

Existing-curb pattern drawing — reference only, verify dimensions before fabrication.

Open this unit in the SMARTCurb workspace →

Replacing a Lennox unit? Read the Lennox curb compatibility guide →

Compatible replacement pairings

Need this fabricated?

Taylor Metals builds SMARTCurb adapters in 16 ga galvanized steel, fully welded, ready to set. Vancouver / Pitt Meadows, BC.

Request a quote — most quotes within 24 hours