Why it matters
The Rellytech 11,500 BTU 115V Mini-Split is rated at 11,500 BTU of cooling. On the ENERGY STAR room sizing chart that suits about 400 to 450 sq ft of average room; the maker says up to 550 sq ft. It runs on 115V, so it needs a dedicated household circuit rather than a 240V line.
Its 17 SEER2 ranks 23 of 26 among the mini-splits within about 12% of its capacity that we cover; the most efficient is the DELLA Optima 12,000 BTU 230V at 24. The maker says heat-pump heating keeps working down to -4°F outside; below that you need another heat source. Indoor noise is listed at 29 dB at its quietest setting.
Expect a professional install: the copper lines are connected, pressure-checked and vacuumed before the refrigerant is released. The kit includes a 42ft copper line set. Warranty, per the listing: 1 Year Manufacturer.
The listing gives dimensions of 11.4 inD x 30.7 inW x 9.5 inH, a shipping or unit weight of 68.5 pounds and a 1,100 W power draw.
Who it's for, and who should skip it
Good fit if
- Rooms of about 400-450 sq ft
- Homes without a spare 240V circuit
Look elsewhere if
- Spaces much larger than 450 sq ft
- Owners who want to avoid a licensed install
Pros and cons
Pros
- 17 SEER2
- Heats down to -4°F
- 42ft copper line set included
- Quiet indoor head (29 dB)
Cons
- Heating capacity not stated on the listing
- Professional install recommended
Limitations to weigh
- Capacity and efficiency are the maker's ratings; real output depends on the install, the line length and the weather.
- Heat pumps lose heating capacity as it gets colder; size for your climate with the BTU calculator.
- The federal 25C tax credit ended for systems installed after 2025; check your utility for current rebates.
Specifications
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Capacity | 4600 cubic feet | Retailer |
|---|---|---|
| Cooling capacity (maker) | 11500 BTU | Retailer |
| Features (seller) | Auto Clean, Fast Cooling, Inverter Compressor, Silent Mode, Sleep Mode | Retailer |
| Dimensions (seller) | 11.4"D x 30.7"W x 9.5"H | Retailer |
| SEER (maker) | 17 | Retailer |
| Voltage | 115 V | Retailer |
| Noise (seller) | 29 db | Retailer |
| Wattage | 1100 W | Retailer |
| Room size (maker) | 550 sq ft | Retailer |
| Model number | #ESW-001 | Retailer |
| Warranty | 1 Year Manufacturer | Retailer |
| Product weight | 68.5 lb | Retailer |
| Control | Remote | Retailer |
| SEER2 (maker) | 17 | Retailer |
| Heats down to (maker) | -4°F | Retailer |
| Line set included | 42ft copper line set | Retailer |
Alternatives worth comparing
More ductless mini-splits we cover
- Rellytech 12,000 BTU 115V Mini-Split, 20 SEER2
- Nexaro 12,000 BTU 115V Mini-Split
- LITHZEN 12,000 BTU 115V Mini-Split
- Mountman 12,000 BTU 115V Mini-Split
All ductless mini-splits, compared in one table · Every Rellytech product we cover
Final verdict
A straightforward choice for a 400-450 sq ft room. Check that 11,500 BTU fits your room with the BTU calculator before you buy.
Where to buy
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