LG KUSAL151A vs Bosch BMS Series (BMS500-AAM018-1CSXHD)
Official ENERGY STAR certified mini-split heat pumps from LG and Bosch, ranked in this category.
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Best for: Official 15,000 Btu/h official cooling, 25 official SEER2
Check price at AmazonBest for: Official 19,000 Btu/h official cooling, 25 official SEER2
Check price at AmazonSpec-by-spec comparison
Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.
| Spec | LG KUSAL151A | Bosch BMS Series (BMS500-AAM018-1CSXHD) | Weight |
|---|---|---|---|
| Official SEER2The official SEER2 cooling-efficiency rating published on the ENERGY STAR certified mini-split heat pump record, in Btu/Wh. It is the certified combination rating for the outdoor and indoor units shown, not a seasonal bill we measured. Official figures above 28 are clamped at the 28 reference best. | 25 | 25 | 30% |
| Official HSPF2The official HSPF2 heating-efficiency rating published on the ENERGY STAR record, in Btu/Wh. It is the certified combination rating, not a winter heating test we ran. Official figures above 13 are clamped at the 13 reference best. | 11.2 | 10.4 | 25% |
| Official EER2The official EER2 cooling-efficiency rating published on the ENERGY STAR record, in Btu/Wh. EER2 is a certified steady-state figure at a stated test condition, not a seasonal measurement we made. Official figures above 16 are clamped at the 16 reference best. | 15 | 15 | 20% |
| Official COP at 5°FThe official coefficient of performance at 5°F published on the ENERGY STAR record. Higher official COP at 5°F means more certified heating output per unit of input at that cold-climate test point. It is a certified laboratory figure, not a test at a house we ran. If the field is blank it is shown as Not listed. Official figures above 2.6 are clamped at the 2.6 reference best. | 1.9 | 2 | 25% |
| Official ENERGY STAR unique ID | 3,721,917 | 3,554,569 | info |
| Official outdoor unit model number | KUSAL151A | BMS500-AAM018-1CSXHD | info |
| Official indoor unit model number | KNSAL151A | Not listed | info |
| Official series name | KUSAL151A | BMS Series | info |
| Official product type | HP - Mini or Multi Split | HP - Mini or Multi Split | info |
| Official cooling capacity | 15,000 Btu/h | 19,000 Btu/h | info |
| Official heating capacity at 47°F | 18,000 Btu/h | 20,000 Btu/h | info |
| Official heating capacity at 17°F | 10,900 Btu/h | 20,000 Btu/h | info |
| Official heating capacity at 5°F | 18,000 Btu/h | 19,000 Btu/h | info |
| Official cold-climate designation | Yes | Yes | info |
| Official ENERGY STAR Most Efficient 2025 | Yes | Yes | info |
| Official refrigerant type | R-32 | R-454B | info |
| Official AHRI reference number | 215828274 | 215223316 | info |
| Official ENERGY STAR date certified | 03/04/2025 | 05/06/2026 | info |
| Official indoor unit brand | Not listed | BOSCH | info |
| Source-data note | Not listed | The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups. | info |
| SplitPick score | 6.5/10 | 6.3/10 | 100% |
Where each one comes out ahead
LG KUSAL151A
Better published figure on: Official HSPF2.
What we like
- Official ENERGY STAR record lists 25 SEER2.
- Official ENERGY STAR record lists 11.2 HSPF2.
- Official ENERGY STAR record lists a cold-climate designation.
Watch out for
- Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Bosch BMS Series (BMS500-AAM018-1CSXHD)
Better published figure on: Official COP at 5°F.
What we like
- Official ENERGY STAR record lists 25 SEER2.
- Official ENERGY STAR record lists a cold-climate designation.
Watch out for
- Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Verdict
Both official ENERGY STAR records list 25 SEER2; compare official HSPF2, official EER2 and official COP at 5°F.
- LG KUSAL151A: ENERGY STAR Certified Mini-Split Heat Pumps (pd_id 3,721,917)
- LG KUSAL151A: ENERGY STAR Product Finder (heat pumps)
- Bosch BMS Series (BMS500-AAM018-1CSXHD): ENERGY STAR Certified Mini-Split Heat Pumps (pd_id 3,554,569)
- Bosch BMS Series (BMS500-AAM018-1CSXHD): ENERGY STAR Product Finder (heat pumps)
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