Quiet, efficient room-by-room comfort with straightforward installation and smart-control options.
Multi-zone inverter heat pump for 2–3 zones. Up to 22 SEER2 and 12.5 EER2. Designed for Multi-Sierra wall-mount indoor units.
Indoor units, line sets, communication cable, and accessories sold separately.
| Spec | Details |
|---|---|
| Model | OS-MSR24-230VO |
| System type | Multi-zone inverter heat pump |
| Cooling capacity (nom.) | 24,000 BTU/h |
| Heating capacity @ 47°F | 24,000 BTU/h |
| SEER2 / EER2 (up to) | 22 / 12.5 |
| HSPF2-5 / HSPF2-4 | 9.17 / 11.21 |
| Refrigerant | R410A |
| Refrigerant piping (liq/gas) | 1/4″ / 3/8″ |
| Refrigerant precharge | 25 (per spec) |
| Additional charge | 0.16 per ft for 1/4″ and 3/8″ liquid lines |
| Max pipe length (indiv./total) | 66 ft / 197 ft |
| Max height difference | 15 |
| Power | 208–230 V, 1-Phase, 60 Hz |
| Voltage range | 198–253 V |
| MCA / Max fuse | 25 A / 30 A |
| Outdoor noise | 59 dB(A) |
| Outdoor air flow | 2.35 (per spec) |
| Unit dimensions (W×H×D) | 37-3/8 × 33 × 13-3/8 in |
| Packing dimensions (W×D×H) | 43-3/4 × 18-1/8 × 36-1/4 in |
| Net / Gross weight | 158.7 / 169.5 lb |
| Ambient temp (heat / cool) | −13~75.2°F / 14~114.8°F |
| Compatible IDUs | OLMO Multi-Sierra wall-mount indoor units (2–3 zones) |
Confirm port count, line sizes, and charging against the submittal and installation manual for your zone mix.