TOSOT Cosmo 12k: Specs, Price & Heating Rating
The TOSOT Cosmo 12k is a 12,000 BTU, 1-zone mini split system from TOSOT (model Cosmo 12k (230V)). Manufacturer-stated coverage: 650 sq ft. Verified SEER2: 19. Manufacturer heating rating: down to -13F. It is a flare-install system in our classification (pro install, or an equipped DIY install with vacuum and gauges). Verified price: $809.99 at TOSOT Direct (checked 2026-11-04).
Computed from our dataset
- 1 system(s) from our verified dataset appear on this page.
- Price range: $809.99 to $809.99 (verified 2026-11-04).
- Cheapest: TOSOT Cosmo 12k at $809.99 (TOSOT Direct).
- Highest SEER2: TOSOT Cosmo 12k at 19 SEER2.
- Best heating rating: TOSOT Cosmo 12k, rated to -13°F.
- Against its class (12,000 BTU, 1 zone): class prices run $659 to $3,792, median $937 - this system sits below the median.
- Dataset note: TOSOT says 'Ready For DIY' with a basic 16 ft line set included, but the page does not state the line set is pre-charged or quick-connect, so we do not count it as true DIY. Operates from -13F to 118F.
| System | Zones | BTU | Coverage | SEER2 | Heats to | Install | Price | |
|---|---|---|---|---|---|---|---|---|
| TOSOT Cosmo 12k Cosmo 12k (230V) | 1 | 12,000 | 650 sq ft | 19 | -13°F | Pro / flare | $809.99 at TOSOT Direct | Check price |
Buying notes
- Specs on this page are exactly the verified fields in our dataset; blanks in the table mean the source did not publish a verifiable figure, and the dataset notes say why where we know.