The Pioneer Diamante Pro 9,000 BTU High-Wall Ductless Mini Split 115V and the Senville Leto 9,000 BTU Mini Split Heat Pump 230V side by side on one honest scale: cooling, room coverage, noise, energy rating and live price, with which one actually fits your room. Every number is the manufacturer's own or a live retailer price. We never invent a spec.
The verdict
For your 350 sq ft room, the better fit is the Pioneer Diamante Pro 9,000 BTU High-Wall Ductless Mini Split 115V (covers up to 350 sq ft). However, the Senville Leto 9,000 BTU Mini Split Heat Pump 230V is quieter at 38 dB(A) and the Senville Leto 9,000 BTU Mini Split Heat Pump 230V is cheaper at $729, if that matters more to you.
![]() Pioneer Diamante Pro 9,000 BTU High-Wall Ductless Mini Split 115VSplitSEER2 19 In stock $858 Buy at Sylvane | ![]() Senville Leto 9,000 BTU Mini Split Heat Pump 230VSplitSEER2 21.2 In stock $729 Package: 16 ft line set Buy at Sylvane | |
|---|---|---|
| Cooling & fit | ||
| Room fit | Fits your 32.5 m²Best | Fits your 32.5 m² |
| Cooling power | 9,000 BTU · 2.6 kW | 9,000 BTU · 2.6 kW |
| Covers | up to 350 sq ft | up to 400 sq ft |
| Comfort | ||
| Indoor noise | ||
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Both units are scored on the exact same scale, from the manufacturer's own published specs and the live retailer price where we have one. Room fit uses the official ENERGY STAR sizing chart, or an estimate from cooling power when a maker publishes no coverage. Where the two efficiency scales are not comparable, we never crown a winner. Nobody can pay for placement.
Read our full methodologyNot sure which kind of AC you need? See the buying guides or the system types.
The bigger questions behind this comparison, answered from live prices and real specs.
| 54 dB(A)about as loud as a dishwasher |
| 38 dB(A)about as loud as a quiet libraryBest |
| Indoor unit size | Slim | CompactBest |
|---|
| Efficiency | ||
| Energy rating | SEER2 19 | SEER2 21.2 |
|---|---|---|
| SEER2 (cooling) | 19 | 21.2 |
| Practicalities | ||
| Heats too | Yes | Yes |
|---|---|---|
| Heating output | 10,000 BTU | 10,000 BTU |
| Heats down to | -4°F outdoors | 5°F outdoors |
| Refrigerant | R-454B | R-454B |
| Install | Certified installer ($1,500-4,000 fitted, est.) | Certified installer ($1,500-4,000 fitted, est.) |
| Outdoor unit | Yes | Yes |
| Warranty | 5-Year Limited Warranty | 5-Year Limited Warranty |
| Price | ||
| Price | $858 | $729Best |
|---|---|---|
| Package | - | 16 ft line set |