Senville’s budget line, for cooling and mild winters: it stops heating below 5 °F, and the 5-year warranty needs a licensed installer.
Price checked October 21, 2026. As an Amazon Associate we earn from qualifying purchases.
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
| Capacity (certified) | |
|---|---|
| Size (nominal) | 36,000 BTU |
| Cooling at 95 °F | 36,000 Btu/h |
| Heating at 47 °F | 36,000 Btu/h |
| Heating at 17 °F (max) | 25,000 Btu/h |
| Heating at 5 °F (max) | 21,400 Btu/h |
| Heat kept at 5 °F | 59% |
| Price per 1,000 Btu/h at 5 °F | $98 |
| Efficiency (certified) | |
| HSPF2 (Region IV) | 8.5 |
| SEER2 | 18 |
| EER2 | 9 |
| COP at 5 °F | 1.80 |
| ENERGY STAR | Not ENERGY STAR |
| AHRI certificate | 215735293 |
| Operating range | |
| Heats down to | 5 °F |
| Installation | |
| Installed by | Professional (sold through installers) |
| Line set connection | Flare fittings (vacuum pump needed) |
| Line set | up to 213 ft |
| Voltage | 230 V |
| Refrigerant | R-454B |
| Indoor unit | SENL-36CD-ILL |
| Outdoor unit | SENL-36CD-OL |
| Build | |
| Indoor noise | 34–56.5 dB(A) |
| Outdoor noise | 61.4 dB(A) |
| Wi-Fi | Built in |
| Room size (maker) | up to 1,800 sq ft |
| Weight | indoor 40.3 lb / outdoor 142.9 lb |
| Warranty | 5 yr compressor, 5 yr parts |
| Warranty with DIY install | No, a licensed installer is required |
The pricier of the two 36,000 BTU quick-connect units, with a better heating limit and quieter indoor unit than the Klimaire. Neither keeps much of its heat in deep cold.
Amazon $3,569.99 MRCOOL DIY Direct $3,790Mitsubishi’s standard line, quiet and efficient, for milder winters: it loses a good share of its heat in deep cold and stops heating at −5 °F.
The best-value quick-connect line: the same certified system as Pioneer’s Quantum Ultra, close to Della’s Optima, without the vacuum pump, for the same price or a few hundred dollars more.
Amazon $2,619Compare the Senville Leto 36,000 BTU with any other mini-split →
More from Senville: every Senville product ranked.
