KARDA vs SLIMAIR TECHNOLOGIES heat pumps

Measured against models of the same size and duct type, KARDA scores higher on 6 of the 6 ratings. KARDA has 11 outdoor models, SLIMAIR TECHNOLOGIES has 11 outdoor models. KARDA and SLIMAIR TECHNOLOGIES have no QMID on file and are not ranked.

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CompareData as of Oct 11, 2026updated Oct 11, 2026 · sources

Against comparable models

Each cell is the share of same-size, same-type models that the manufacturer’s typical model beats (50% is typical); the higher score is in bold. Raw medians are underneath for context: they depend on which sizes each one makes, so they are not compared.

KARDA and SLIMAIR TECHNOLOGIES on every ratingPeer scores, 0–100 · grey ticks: every ranked manufacturer · shaded: the middle half of each one’s modelsMeasured against models of the same size and duct type, KARDA scores higher on 6 of the 6 ratings.

KARDA
SLIMAIR TECHNOLOGIES
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 11, 2026

Average peer percentile, raw median and rank among ranked manufacturers
Rating	KARDA	SLIMAIR TECHNOLOGIES
Efficiency index	66% (higher)median —	47% (higher)median —
COP at 5°F	38% (higher)median 1.89	14% (higher)median 1.78
Capacity retention at 5°F	67% (higher)median 94%	33% (higher)median 68%
HSPF2	78% (higher)median 10.5	32% (higher)median 8.6
SEER2	78% (higher)median 21.1	32% (higher)median 17.0
EER2	63% (higher)median 12.0	38% (higher)median 10.6
Heating capacity at 5°F	64% (higher)median 17,700 Btu/h	51% (higher)median 10,150 Btu/h
Outdoor models	11	11
AHRI certifications	33	11

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	KARDA	SLIMAIR TECHNOLOGIES
CEE 2025 Tier 1 (Split ASHP)	100%11 models	18.2%2 models
CEE 2026 Tier 1 (Split ASHP)	90.9%10 models	18.2%2 models
CEE Advanced Tier (Split ASHP)	0%0 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	81.8%9 models	9.1%1 models
DOE Cold Climate Heat Pump Challenge	0%0 models	0%0 models
ENERGY STAR Cold Climate	72.7%8 models	0%0 models

Sizes and duct types offered

Models in each peer group, with the efficiency index of those models against the rest of the group.

Side by side, inside each size and duct typeShape: every model of the group · bars: each manufacturer’s middle half, median dot, 10th–90th line · 5 groups where both have models

KARDA
SLIMAIR TECHNOLOGIES
All models of the group

Raw ratings are only placed side by side within one size and duct type, where they are comparable.

Source: AHRI Directory · as of Oct 11, 2026

Models per peer group · efficiency index within the group
Size and duct type	KARDA	SLIMAIR TECHNOLOGIES
Ducted, up to 1.5 tons	5 · index 61%	None
Ducted, 2 tons	2 · index 80%	None
Ducted, 2.5–3 tons	2 · index 64%	1 · index —
Ducted, 3.5–4.5 tons	1 · index 64%	1 · index —
Non-ducted, up to 1.5 tons	5 · index 71%	5 · index 47%
Non-ducted, 2 tons	1 · index 66%	2 · index —
Non-ducted, 2.5–3 tons	2 · index 60%	2 · index —
Non-ducted, 3.5–4.5 tons	1 · index 48%	None

Cold-climate and all-around picks, size class by size class

Each manufacturer’s best model on each board in every size and duct type, side by side; the higher score is in bold. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there), so the two compare fairly even when they make different sizes.

Cold-climate picks

Best cold-climate pick per size and duct type (keeps at least 70% of its heat at 5°F). Qualifies when its capacity retention at 5°F (capacity at 5°F as a share of capacity at 47°F) is at least 70% and Capacity retention at 5°F, COP at 5°F, HSPF2 are all rated. Score = the equal-weight mean of its peer percentiles on Capacity retention at 5°F, COP at 5°F, HSPF2 (share of the other models in its peer group it beats, 0–100), all from one certified pairing: in each duct type a model is sold in, its qualifying pairing of that type with the best score; equal scores (one decimal) go to the higher heating capacity at 5°F.
Size and duct type	KARDACold-climate score, best model	SLIMAIR TECHNOLOGIESCold-climate score, best model
Ducted, up to 1.5 tons	74.9(50 is the typical model of its size class)3KARDA09SZOwith ducted air handler 3KARDA09UVD5 of 5 models qualify · AHRI 207796637	No models in this size class
Ducted, 2 tons	79.4(50 is the typical model of its size class)1KARDA24SZO20.5with ducted air handler 2PAMSDH24Also listed as 3KARDA24SZO2 of 2 models qualify · AHRI 206348123	No models in this size class
Ducted, 2.5–3 tons	57.4(50 is the typical model of its size class)3KARDA27MZ31 of 2 models qualify · AHRI 207657362	None on this board (0 of 1 models qualify)
Ducted, 3.5–4.5 tons	None on this board (0 of 1 models qualify)	None on this board (0 of 1 models qualify)
Non-ducted, up to 1.5 tons	77.0(50 is the typical model of its size class) (higher)3KARDA12SZOwith ductless indoor unit 3KARDA12CON-24 of 5 models qualify · AHRI 210410112	34.7(50 is the typical model of its size class)SHC12VB-2Hwith ductless indoor unit SHM12VB-2DC1 of 5 models qualify · AHRI 9060039
Non-ducted, 2 tons	86.1(50 is the typical model of its size class)3KARDA24SZOwith ductless indoor unit 3KARDA24UVC1 of 1 models qualify · AHRI 207796643	None on this board (0 of 2 models qualify)
Non-ducted, 2.5–3 tons	49.3(50 is the typical model of its size class)3KARDA27MZ31 of 2 models qualify · AHRI 207657363	None on this board (0 of 2 models qualify)
Non-ducted, 3.5–4.5 tons	None on this board (0 of 1 models qualify)	No models in this size class

All-around best

Best all-around model per size and duct type. Score = 50% heating, the mean of its peer percentiles on COP at 5°F, Capacity retention at 5°F, HSPF2, plus 50% cooling, the mean of its peer percentiles on SEER2 and EER2 (share of the other models in its peer group it beats, 0–100). All five ratings are required; there is no minimum heat kept at 5°F. In each duct type a model is sold in, it is scored on its pairing of that type with the best score; equal scores (one decimal) go to the higher cold-climate score, then the higher heating capacity at 5°F.
Size and duct type	KARDAAll-around score, best model	SLIMAIR TECHNOLOGIESAll-around score, best model
Ducted, up to 1.5 tons	85.2(50 is the typical model of its size class)3KARDA09SZOwith ducted air handler 3KARDA09UVD5 of 5 models have all five ratings · AHRI 207796637	No models in this size class
Ducted, 2 tons	80.1(50 is the typical model of its size class)1KARDA24SZO20.5with ducted air handler 2PAMSDH24Also listed as 3KARDA24SZO2 of 2 models have all five ratings · AHRI 206348123	No models in this size class
Ducted, 2.5–3 tons	71.5(50 is the typical model of its size class)3KARDA27MZ32 of 2 models have all five ratings · AHRI 207657362	None on this board (0 of 1 models have all five ratings)
Ducted, 3.5–4.5 tons	63.5(50 is the typical model of its size class)3KARDA48MZ51 of 1 models have all five ratings · AHRI 207657369	None on this board (0 of 1 models have all five ratings)
Non-ducted, up to 1.5 tons	84.4(50 is the typical model of its size class) (higher)3KARDA09SZOwith ductless indoor unit 3KARDA09UVW5 of 5 models have all five ratings · AHRI 207430429	46.8(50 is the typical model of its size class)SHC18VB-2Hwith ductless indoor unit SHM18VB-2DC2 of 5 models have all five ratings · AHRI 9060040
Non-ducted, 2 tons	70.7(50 is the typical model of its size class)3KARDA24SZOwith ductless indoor unit 3KARDA24UVW1 of 1 models have all five ratings · AHRI 207430431	None on this board (0 of 2 models have all five ratings)
Non-ducted, 2.5–3 tons	66.7(50 is the typical model of its size class)3KARDA27MZ32 of 2 models have all five ratings · AHRI 207657363	None on this board (0 of 2 models have all five ratings)
Non-ducted, 3.5–4.5 tons	48.3(50 is the typical model of its size class)3KARDA48MZ51 of 1 models have all five ratings · AHRI 207657368	No models in this size class

All-around board, every manufacturer

Standout model on each rating

Each manufacturer’s model that beats the largest share of comparable models on the rating; the higher share is in bold.

Top model per rating by peer percentile, with its AHRI-certified value and peer group
Rating	KARDA	SLIMAIR TECHNOLOGIES
COP at 5°F	beats 65% · 2.003KARDA18MZ2Non-ducted, up to 1.5 tons	beats 22% · 1.80SHC18VB-2HNon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 93% · 108%3KARDA09SZODucted, up to 1.5 tons	beats 39% · 70%SHC12VB-2HNon-ducted, up to 1.5 tons
HSPF2	beats 98% · 12.03KARDA09SZODucted, up to 1.5 tons	beats 80% · 9.3SHCD48VB2Ducted, 3.5–4.5 tons
SEER2	beats 98% · 21.03KARDA27MZ3Ducted, 2.5–3 tons	beats 67% · 22.5SHC18VB-2HNon-ducted, up to 1.5 tons
EER2	beats 95% · 15.83KARDA09SZONon-ducted, up to 1.5 tons	beats 80% · 13.7SHC09VB-2HNon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 93% · 27,000 Btu/h1KARDA24SZO20.5Also listed as 3KARDA24SZODucted, 2 tons	beats 66% · 11,900 Btu/hSHC18VB-2HNon-ducted, up to 1.5 tons

More comparisons

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