MRCOOL DIY 5th Gen 2-Zone 18k (6+6): Specs, Price & Heating Rating
The MRCOOL DIY 5th Gen 2-Zone 18k (6+6) is a 18,000 BTU, 2-zone mini split system from MRCOOL (model DIY-MULTI3-18HP230). Verified SEER2: 23.9. 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: $2,469 at HVACDirect (checked 2026-11-04).
Computed from our dataset
- 1 system(s) from our verified dataset appear on this page.
- Price range: $2,469 to $2,469 (verified 2026-11-04).
- Cheapest: MRCOOL DIY 5th Gen 2-Zone 18k (6+6) at $2,469 (HVACDirect).
- Highest SEER2: MRCOOL DIY 5th Gen 2-Zone 18k (6+6) at 23.9 SEER2.
- Best heating rating: MRCOOL DIY 5th Gen 2-Zone 18k (6+6), rated to -13°F.
- Against its class (18,000 BTU, 2 zone): class prices run $2,094 to $4,076, median $3,956 - this system sits below the median.
- Dataset note: IMPORTANT: pre-charged line sets are NOT included at this price (the product page says so) - they are per-zone add-ons (about +$227 for 16 ft / +$264 for 25 ft). Price pair taken from HVACDirect's category listing for this model.
| System | Zones | BTU | Coverage | SEER2 | Heats to | Install | Price | |
|---|---|---|---|---|---|---|---|---|
| MRCOOL DIY 5th Gen 2-Zone 18k (6+6) DIY-MULTI3-18HP230 | 2 | 18,000 | — | 23.9 | -13°F | Pro / flare | $2,469$2,715.90 at HVACDirect | Check price at HVACDirect |
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.