Aerosys S Series · Discontinued
THDC-24SGA Replacement
Aerosys has permanently closed. There is no manufacturer left to order this from, and no factory support behind it.
We supply the replacement. Below is what this unit was, what goes in its place, and how to be sure it fits before anyone orders anything.
What you have, and what replaces it
- Capacity
- 2.0 ton23,900 BTU nominal
- Wall opening
- 26" W x 28-5/8" H
- Replacement
- NCP5241000A
- Refrigerant
- R-454B
Ordering more than one?
If this model is on a full line of apartments, send the count and we will quote the line together with staged delivery so the units arrive as your contractor is ready for them, rather than all at once.
Confirm it fits
The S Series used a 26" W x 28-5/8" H opening. Openings settle and get patched over the decades, so measure yours before ordering. If you want the full picture first, the sleeve size guide covers every standard NYC opening and how to measure one properly.
What fits my opening?
Measure the wall opening, not the old unit. Cabinets are built undersized so they can slide in, so measuring the equipment gives you a number that is too small. Measure in two places, because these are rarely square after decades.
Standard NYC openings
| Opening | Known as |
|---|---|
| 36" x 19" | Aerosys P Series, AboveAir VCU-C |
| 24" x 32" | Aerosys T Series |
| 26" x 28-5/8" | Aerosys S Series |
| 30" x 23" | Aerosys R Series |
| 27" x 44" | Aerosys H Series |
| 42" x 16" | Older NYC PTAC standard |
| 42" x 23" | Aerosys M Series, 3 to 5 ton |
Other S Series models
Buildings rarely have just one. If the nameplates vary by line or by floor, these are the rest of the series.
- THDC-18SGA1.5 ton
- TTWC-R18S211.5 ton
- TTWC-R18S21LX1.5 LX ton
- TTWC-R24S212.0 ton
- TTWC-R24S21LX2.0 LX ton
- THDC-30SGA2.5 ton
- TTWC-R30S212.5 ton
- TTWC-R30S21LX2.5 LX ton