KeplerX heat pump efficiency: 8 outdoor models compared

KeplerX has 8 heat pump outdoor models certified with this refrigerant group, in 12 AHRI-certified combinations. Each model is compared with models of the same size and duct type, so the scores below do not depend on which sizes KeplerX makes. KeplerX has no QMID (IRS Qualified Manufacturer ID) on file, so it is not ranked against other manufacturers.

New to heat pump ratings? The Simple view explains them in plain words →

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

Outdoor models: 8
AHRI certifications: 12
Efficiency index: 53%; Typical model vs same-size, same-type peers (1 model)
Meet CEE 2025: 0%; 0 models

How KeplerX compares with comparable models

For each rating: the share of same-size, same-type models that a typical model of this manufacturer beats (50% is typical), its rank, and the raw median for context. Raw medians are not comparable across manufacturers that make different sizes.

KeplerX against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of KeplerX’s own modelsKeplerX is strongest on heating capacity at 5°F (its typical model beats 95% of comparable models) and weakest on SEER2 (22%).

KeplerX
Middle half of its models
Other ranked manufacturers

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

Average peer percentile of KeplerX’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index1 model scored	53%	Not ranked	—
COP at 5°F1 model scored	49%	Not ranked	1.91
Capacity retention at 5°F1 model scored	78%	Not ranked	82%
HSPF28 models scored	33%	Not ranked	7.5
SEER28 models scored	22%	Not ranked	14.3
EER28 models scored	54%	Not ranked	11.5
Heating capacity at 5°F1 model scored	95%	Not ranked	48,500 Btu/h

Standards met

Share of KeplerX’s models with at least one qualifying certification
Standard	Share	Models
CEE 2025 Tier 1 (Split ASHP)	0%	0
CEE 2026 Tier 1 (Split ASHP)	0%	0
CEE Advanced Tier (Split ASHP)	0%	0
Xcel Energy Colorado cold-climate ASHP (2025)	0%	0
DOE Cold Climate Heat Pump Challenge	0%	0
ENERGY STAR Cold Climate	0%	0

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.

KeplerX’s models inside each size and duct typeShape: every model of the group · blue: the middle half of this manufacturer’s models there, median dot, 10th–90th percentile line

KeplerX (median, middle 50%, 10th–90th)
All models of the group

Source: AHRI Directory · as of Oct 11, 2026

Share of comparable models beaten, per peer group
Size and duct type	Models	Index	COP@5°F	HSPF2	SEER2
Ducted, up to 1.5 tons	1	—	—	12%	10%
Ducted, 2 tons	1	—	—	22%	14%
Ducted, 2.5–3 tons	2	—	—	24%	15%
Ducted, 3.5–4.5 tons	4	53%	49%	45%	30%

Every KeplerX model in the market

KeplerX’s 8 models with a known size and duct type, over the shape of the whole catalog.

KeplerX models by size and ratingColoured: KeplerX · grey shapes: all 11,475 models · lines: catalog medians by size

KeplerX models
Ducted median by size
Non-ducted median by size
Every model at each size (width = count)
Standard threshold

Dots: 8 keplerx models, each through its representative certification, in the colour of the rating shown. The grey shapes count all 11,475 models, half a ton at a time.

Show the data as a table

COP at 5°F by size and duct type (every model, by rated cooling capacity)
Duct type, size	Models	10th pct.	25th	Median	75th	90th
Ducted, 0.5 tons	175	1.70	1.85	1.90	2.10	2.26
Ducted, 1 ton	340	1.85	1.90	2.00	2.40	2.65
Ducted, 1.5 tons	789	1.75	1.85	2.00	2.20	2.55
Ducted, 2 tons	782	1.73	1.80	2.00	2.10	2.33
Ducted, 2.5 tons	735	1.71	1.80	1.90	2.09	2.48
Ducted, 3 tons	652	1.68	1.70	1.90	2.06	2.36
Ducted, 3.5 tons	641	1.61	1.80	1.95	2.20	2.50
Ducted, 4 tons	367	1.70	1.80	1.91	2.02	2.52
Ducted, 4.5 tons	544	1.70	1.80	1.91	2.08	2.34
Ducted, 5 tons	25	1.80	1.80	1.90	1.90	2.15
Non-ducted, 0.5 tons	717	1.75	1.81	1.97	2.10	2.19
Non-ducted, 1 ton	1,064	1.75	1.80	1.90	2.07	2.25
Non-ducted, 1.5 tons	886	1.80	1.80	1.87	2.07	2.21
Non-ducted, 2 tons	564	1.80	1.80	1.83	2.04	2.21
Non-ducted, 2.5 tons	275	1.80	1.81	1.84	1.86	2.03
Non-ducted, 3 tons	502	1.80	1.80	1.90	2.00	2.09
Non-ducted, 3.5 tons	70	1.82	1.83	1.90	2.00	2.28
Non-ducted, 4 tons	263	1.80	1.80	1.98	2.00	2.10
Non-ducted, 4.5 tons	103	1.77	1.77	1.80	1.97	2.02
Non-ducted, 5 tons	29	1.98	2.00	2.10	2.30	2.47

Source: AHRI Directory · as of Oct 11, 2026

Top KeplerX models

Its top five cold-climate picks and its top five all-around models across sizes (both scores compare each model with models of its own size and duct type, so sizes compare), then, on each single rating, the model that beats the largest share of comparable models.

Cold-climate picks

Top 1 KeplerX cold-climate picks across sizes. 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.
# · Outdoor model	Size · type	Cap. 5/47	COP@5°F	HSPF2	Btu/h @5°F	SEER2	Meets	Combos	AHRI ref.	Compared with	Score
1K18HVH60WD2UKeplerXwith ducted air handler K18HVH60WD2H	4.5 tons55,000 Btu/h · Ducted	82%	1.91	9.4	48,500	15.3	None	1	214655291	Ducted, 3.5–4.5 tons	71.3

All-around best

Top 1 KeplerX models on the all-around score across sizes. 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.
# · Outdoor model	Size · type	Cap. 5/47	COP@5°F	HSPF2	SEER2	EER2	Meets	Combos	AHRI ref.	Compared with	Score	Heating half	Cooling half	Cold-climate score
1K18HVH60WD2UKeplerXwith ducted air handler K18HVH60WD2H	4.5 tons55,000 Btu/h · Ducted	82%	1.91	9.4	15.3	8.8	None	1	214655291	Ducted, 3.5–4.5 tons	53.3	71.3	35.3	71.3

Best model on each rating

KeplerX’s model with the highest peer percentile on each rating, ranked by that one rating only
Rating	Model	Value	Compared with	Beats	AHRI ref.
COP at 5°F	K18HVH60WD2U	1.91	Ducted, 3.5–4.5 tons	49%	214655291
Capacity retention at 5°F	K18HVH60WD2U	82%	Ducted, 3.5–4.5 tons	75%	214655291
HSPF2	K18HVH60WD2U	9.4	Ducted, 3.5–4.5 tons	87%	214655291
SEER2	K18HVH60WD2U	15.3	Ducted, 3.5–4.5 tons	50%	214655291
EER2	K15HVH42W2V	11.5	Ducted, 3.5–4.5 tons	68%	212386833
Heating capacity at 5°F	K18HVH60WD2U	48,500 Btu/h	Ducted, 3.5–4.5 tons	95%	214655291

All 8 KeplerX models in Explore

KeplerX size class by size class: cold-climate and all-around

Its best model on each board in every size and duct type it makes. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there). Cold-climate picks must keep at least 70% of their heat at 5°F; the all-around score needs all five ratings and has no such bar.

KeplerX: best cold-climate pick and best all-around model per size and duct type, with how many of its models are on each board (top 5 and 5 per class are in the snapshot)
Size and duct type	Cold-climate pickCold-climate score, best model	All-around bestAll-around score, best model
Ducted, up to 1.5 tons	None on this board (0 of 1 models qualify)	None on this board (0 of 1 models have all five ratings)
Ducted, 2 tons	None on this board (0 of 1 models qualify)	None on this board (0 of 1 models have all five ratings)
Ducted, 2.5–3 tons	None on this board (0 of 2 models qualify)	None on this board (0 of 2 models have all five ratings)
Ducted, 3.5–4.5 tons	71.3(50 is the typical model of its size class)K18HVH60WD2Uwith ducted air handler K18HVH60WD2H1 of 4 models qualify · AHRI 214655291	53.3(50 is the typical model of its size class)K18HVH60WD2Uwith ducted air handler K18HVH60WD2H1 of 4 models have all five ratings · AHRI 214655291

All-around board, every manufacturer

Newest KeplerX certifications

By AHRI reference number; AHRI issues references in increasing order.

The 5 most recently certified KeplerX outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
K18HVH60WD2UKeplerXwith ducted air handler K18HVH60WD2H	4.5 tons55,000 Btu/h · Ducted	1.91	82%	9.4	15.3	None	1	214655291
K15HVH36W2VKeplerXwith ducted air handler K15HVC36W2F	3 tons33,000 Btu/h · Ducted	—	—	7.5	14.3	None	2	212386839
K15HVH30W2VKeplerXwith ducted air handler K15HVC30W2F	2.5 tons28,000 Btu/h · Ducted	—	—	7.5	14.3	None	2	212386838
K15HVH24W2VKeplerXwith ducted air handler K15HVC24W2F	2 tons22,000 Btu/h · Ducted	—	—	7.5	14.3	None	2	212386837
K15HVH18W2VKeplerXwith ducted air handler K15HVC18W2F	1.5 tons17,500 Btu/h · Ducted	—	—	7.5	14.3	None	2	212386836

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Compare KeplerX

Manufacturers of a similar size, side by side.

Compare with any manufacturer

KeplerX includes these brand names as listed in AHRI: KeplerX. Standards are checked against published thresholds; program rules beyond ratings are not checked.