Lennox GCS1-651/653 — curb adapter & replacement fit
The Lennox GCS1-651/653 mounts on a roof curb with an overall footprint of 108.5″ × 62.5″. 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: 108.5″ × 62.5″ (L × W)
Covered models: GCS1-651/653
Existing-curb pattern drawing — reference only, verify dimensions before fabrication.
Replacing a Lennox unit? Read the Lennox curb compatibility guide →
Compatible replacement pairings
- Lennox CHA111853 108″ × 59.5″
- Lennox GCS111853 108″ × 59.5″
- Lennox CHA161853 112″ × 64″
- Lennox GCS111353 108″ × 69.5″
- Lennox CHA81353 106″ × 57″
- Lennox CHA16 1603 92.5″ × 58.5″
- American Standard BWC090/120C 104″ × 63″
- American Standard BTC090/120C/D 103.5″ × 63″
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