Mini Split for a 40x40 Shop: Size & Systems
A 40x40 shop is 1,600 sq ft. At 20 BTU per square foot that is a 32,000 BTU cooling load, putting it in the 36,000 BTU class before adjustments. Our dataset holds 2 verified system(s) here, 2 with first-hand prices from $3,469 to $4,538; the cheapest is the MRCOOL DIY 5th Gen 36k.
Computed from our dataset
- 2 system(s) from our verified dataset appear on this page.
- Price range: $3,469 to $4,538 (verified 2026-11-04).
- Cheapest: MRCOOL DIY 5th Gen 36k at $3,469 (Sylvane).
- Highest SEER2: MRCOOL DIY 5th Gen 3-Zone 36k (9+9+18) at 23 SEER2.
- Best heating rating: MRCOOL DIY 5th Gen 3-Zone 36k (9+9+18), rated to -13°F.
| System | Zones | BTU | Coverage | SEER2 | Heats to | Install | Price | |
|---|---|---|---|---|---|---|---|---|
| MRCOOL DIY 5th Gen 36k DIY-36-HP-WM-230D25-O | 1 | 36,000 | up to 1,550 sq ft | 18 | — | Pro / flare | $3,469 at Sylvane | Check price |
| MRCOOL DIY 5th Gen 3-Zone 36k (9+9+18) DIY-MULTI5-36HP230D | 3 | 36,000 | Per-zone: 400 / 400 / 1,000 sq ft | 23 | -13°F | Pro / flare | $4,538 at HVACDirect | Check price at HVACDirect |
Buying notes
- Metal buildings and shops lose heat and gain heat fast: insulation is worth more than the next size up.
- Ceiling height matters - a 12-14 ft shop ceiling adds load the flat sq ft rule does not see; size toward the top of the class.