Reznor RDDA-428-H550 — curb adapter & replacement fit
The Reznor RDDA-428-H550 mounts on a roof curb with an overall footprint of 101.5″ × 65″. 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: 101.5″ × 65″ (L × W)
Covered models: RDDA-428-H550
Existing-curb pattern drawing — reference only, verify dimensions before fabrication.
Compatible replacement pairings
- Reznor RDDA-346-H450 101.5″ × 65″
- Reznor RDDA-280-H500 101.63″ × 65.13″
- Reznor RPB400 96.5″ × 57″
- Reznor HDP400 109″ × 53.75″
- Reznor RDDA-220-H250 72.75″ × 53.5″
- Reznor RPB200/225 84.56″ × 35.31″
- Trane TCD121/151C 102″ × 67″
- York SA91 103″ × 66″
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