Lennox GCS4261/311 — curb adapter & replacement fit
The Lennox GCS4261/311 mounts on a roof curb with an overall footprint of 68″ × 28″. 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: 68″ × 28″ (L × W)
Covered models: GCS4261/311
Existing-curb pattern drawing — reference only, verify dimensions before fabrication.
Replacing a Lennox unit? Read the Lennox curb compatibility guide →
Compatible replacement pairings
- Lennox 13CHAA24/30/36 62.5″ × 34″
- Lennox ZCA/B036/048/060/072 71″ × 42″
- Lennox ZHD060S 71″ × 42.25″
- Lennox ZHB036S4B 71″ × 42.3125″
- Lennox GCS10261/311/411/413/461/463/511/513/651/653 66.5″ × 44.5″
- Lennox 13CHAA42/48/60 72″ × 43.5″
- American Standard BYC024/30/36/42H 67″ × 32″
- Carrier 48HJD015 70.5″ × 22.75″
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