Best Mini Split for a Sunroom
Sunrooms break the chart: glass load pushes sizing to 30-35 BTU per sq ft, which lands most sunrooms in the 18k-24k band despite modest floor area. Our dataset holds 15 verified system(s) here, 15 with first-hand prices from $999.99 to $4,214.25; the cheapest is the Senville LETO 18k, and 4 of them are true DIY (pre-charged line sets).
Computed from our dataset
- 15 system(s) from our verified dataset appear on this page.
- Price range: $999.99 to $4,214.25 (verified 2026-11-04).
- Cheapest: Senville LETO 18k at $999.99 (Senville).
- Highest SEER2: MRCOOL DIY 5th Gen 24k at 22.7 SEER2.
- Best heating rating: Senville AURA 24k, rated to -22°F.
- True DIY in this list: 4 system(s) with factory pre-charged line sets.
| System | Zones | BTU | Coverage | SEER2 | Heats to | Install | Price | |
|---|---|---|---|---|---|---|---|---|
| Senville LETO 18k SENL-18CD | 1 | 18,000 | 700-1,000 sq ft | 19.2 | 5°F | Pro / flare | $999.99 at Senville | Check price |
| Pioneer Diamante Pro 18k WYT018GLSI20RL | 1 | 18,000 | 500-750 sq ft | 21 | -4°F | Pro / flare | $1,178$1,679 at Pioneer Mini Split | Check price |
| Senville LETO 24k SENL-24CD | 1 | 24,000 | 1,000-1,250 sq ft | 18.7 | 5°F | Pro / flare | $1,249.99 at Senville | Check price |
| TOSOT Cosmo 24k GWH24AWEXF-D6DNA1FI / GWH24ATEXF-D6DNA1FO | 1 | 24,000 | 1,400 sq ft | 19 | -13°F | Pro / flare | $1,299 at TOSOT Direct | Check price |
| Pioneer Diamante Pro 24k WYT024GLSI20RL | 1 | 24,000 | 750-1,000 sq ft | 21 | -4°F | Pro / flare | $1,528$2,179 at Pioneer Mini Split | Check price |
| LG Standard 24k KSSAE241A | 1 | 24,000 | up to ~1,500 sq ft | 18 | — | Pro / flare | $1,668 at HVACDirect | Check price at HVACDirect |
| Senville AURA 24k SENA-24HF | 1 | 24,000 | — | — | -22°F | Pro / flare | $1,769.99 at Sylvane | Check 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 |
| Klimaire KSIE 24k KSIE024-H220-S(W) | 1 | 24,000 | — | — | — | Pro / flare | $1,965 at A&A Mini Splits | Check price |
| MRCOOL DIY Easy Pro 24k EZPRO-24-HP-23016D-O | 1 | 24,000 | ~1,050 sq ft | 18.9 | -13°F | True DIY | $2,149 at HVACDirect | Check price at HVACDirect |
| Cooper & Hunter Olivia Hyper Heat 24k CH-R24MOLVWM-230VI / CH-RHP24-230VO | 1 | 24,000 | up to ~1,100 sq ft | 22.3 | -22°F | Pro / flare | $2,592.96 at MiniSplitsForLess | Check price |
| 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 |
| MRCOOL DIY 5th Gen 24k DIY-24-HP-WM-230D25-O | 1 | 24,000 | up to 1,050 sq ft | 22.7 | -13°F | True DIY | $3,329 at HVACDirect | Check price at HVACDirect |
| Daikin Aurora 18k FTXV18AVJU9 / RXT18AVJU9 | 1 | 18,000 | — | 21 | -13°F | Pro / flare | $3,932 at Alpine Home Air | Check price |
| Mitsubishi EX-Series Hyper-Heat 18k SUZ-AA18NLHZ / MSZ-EX18NLS | 1 | 18,000 | up to ~800 sq ft | 17.5 | -13°F | Pro / flare | $4,214.25 at HVACDirect | Check price at HVACDirect |
Buying notes
- Match the system to the space's worst season: cooling load sets the class, the heating rating decides whether it is a year-round tool.
- Every system here is a verified, priced single-zone (or, for ADUs, a small multi-zone) - class pages list the full field including unpriced systems.