DIY 18,000 BTU Mini Splits (True DIY Only)
Every true-DIY system at 18,000 BTU in our verified dataset - 'true DIY' meaning the line set itself is factory pre-charged with quick-connect fittings, so no vacuum pump, gauges, or flaring are needed. At this size that field is MRCOOL's two lines plus any verified pre-charged competitor we could confirm; systems that merely ship a pre-charged condenser with a flare line set are excluded on purpose. Our dataset holds 3 verified system(s) here, 2 with first-hand prices from $1,827 to $2,909; the cheapest is the MRCOOL DIY Easy Pro 18k, and 3 of them are true DIY (pre-charged line sets).
Computed from our dataset
- 3 system(s) from our verified dataset appear on this page; 2 carry a verified USD price.
- Price range: $1,827 to $2,909 (verified 2026-11-04).
- Cheapest: MRCOOL DIY Easy Pro 18k at $1,827 (HVACDirect).
- Highest SEER2: MRCOOL DIY 5th Gen 18k at 21.5 SEER2.
- Best heating rating: MRCOOL DIY 5th Gen 18k, rated to -13°F.
- True DIY in this list: 3 system(s) with factory pre-charged line sets.
| System | Zones | BTU | Coverage | SEER2 | Heats to | Install | Price | |
|---|---|---|---|---|---|---|---|---|
| MRCOOL DIY Easy Pro 18k EZPRO-18-HP-23016D-O | 1 | 18,000 | up to 800 sq ft | 20 | -13°F | True DIY | $1,827 at HVACDirect | Check price at HVACDirect |
| MRCOOL DIY 5th Gen 18k DIY-18-HP-WM-230D25-O | 1 | 18,000 | up to 800 sq ft | 21.5 | -13°F | True DIY | $2,909 at HVACDirect | Check price at HVACDirect |
| TOSOT Muse 18k (prior generation) TST-SU-MUSE-18K230 | 1 | 18,000 | — | — | -13°F | True DIY | Not verified no USD price found | Specs source |
Buying notes
- Count your line-set length before choosing between the DIY (25 ft) and Easy Pro (16 ft) lines - that, not the badge, is the real difference.
- You still need power run to the unit; plan the electrical before the install weekend.