iCongo heat pump efficiency: 47 outdoor models compared

iCongo has 47 heat pump outdoor models certified with this refrigerant group, in 97 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 iCongo makes. iCongo has no QMID (IRS Qualified Manufacturer ID) on file, so it is not ranked against other manufacturers.

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ManufacturerData as of Oct 9, 2026updated Oct 10, 2026 · sources

Outdoor models: 47
AHRI certifications: 97
Efficiency index: 42%; Typical model vs same-size, same-type peers (47 models)
Meet CEE 2025: 31.9%; 15 models

How iCongo 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.

iCongo against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of iCongo’s own modelsiCongo is strongest on heating capacity at 5°F (its typical model beats 55% of comparable models) and weakest on EER2 (28%).

iCongo
Middle half of its models
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 9, 2026

Average peer percentile of iCongo’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index47 models scored	42%	Not ranked	—
COP at 5°F47 models scored	37%	Not ranked	1.82
Capacity retention at 5°F47 models scored	52%	Not ranked	68%
HSPF247 models scored	49%	Not ranked	8.4
SEER247 models scored	48%	Not ranked	15.8
EER247 models scored	28%	Not ranked	10.0
Heating capacity at 5°F47 models scored	55%	Not ranked	25,200 Btu/h

Standards met

Share of iCongo’s models with at least one qualifying certification
Standard	Share	Models
CEE 2025 Tier 1 (Split ASHP)	31.9%	15
CEE 2026 Tier 1 (Split ASHP)	31.9%	15
CEE Advanced Tier (Split ASHP)	0%	0
Xcel Energy Colorado cold-climate ASHP (2025)	31.9%	15
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.

iCongo’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

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

Source: AHRI Directory · as of Oct 9, 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	3	35%	63%	21%	28%
Ducted, 2 tons	10	43%	32%	43%	45%
Ducted, 2.5–3 tons	12	37%	32%	44%	45%
Ducted, 3.5–4.5 tons	22	46%	38%	57%	54%

Every iCongo model in the market

iCongo’s 47 models with a known size and duct type, over the shape of the whole catalog.

iCongo models by size and ratingColoured: iCongo · grey shapes: all 14,508 models · lines: catalog medians by size

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

Dots: 47 icongo models, each through its representative certification, in the colour of the rating shown. The grey shapes count all 14,508 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	826	1.64	1.71	1.75	1.85	2.24
Ducted, 1 ton	407	1.80	1.90	2.05	2.41	2.45
Ducted, 1.5 tons	992	1.75	1.86	2.00	2.17	2.40
Ducted, 2 tons	999	1.75	1.86	2.00	2.18	2.30
Ducted, 2.5 tons	1,040	1.70	1.80	2.00	2.10	2.36
Ducted, 3 tons	696	1.80	1.90	2.00	2.10	2.42
Ducted, 3.5 tons	864	1.70	1.80	2.00	2.10	2.46
Ducted, 4 tons	727	1.80	1.86	2.00	2.12	2.40
Ducted, 4.5 tons	690	1.70	1.80	1.90	2.10	2.20
Ducted, 5 tons	86	1.89	2.00	2.10	2.10	2.10
Non-ducted, 0.5 tons	1,186	1.75	1.80	1.90	2.00	2.22
Non-ducted, 1 ton	1,343	1.80	1.80	1.99	2.10	2.21
Non-ducted, 1.5 tons	1,261	1.80	1.80	2.00	2.10	2.31
Non-ducted, 2 tons	761	1.80	1.98	2.00	2.10	2.30
Non-ducted, 2.5 tons	403	1.80	1.85	2.00	2.00	2.10
Non-ducted, 3 tons	473	1.90	1.98	2.00	2.03	2.20
Non-ducted, 3.5 tons	280	2.00	2.00	2.00	2.05	2.10
Non-ducted, 4 tons	204	1.96	2.00	2.05	2.10	2.11
Non-ducted, 4.5 tons	78	1.90	1.91	1.95	2.01	2.01
Non-ducted, 5 tons	84	1.99	2.00	2.05	2.20	2.20

Source: AHRI Directory · as of Oct 9, 2026

Top iCongo 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 5 iCongo 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
1ZWDA-24HI1N4-M-SE18iCongoAlso listed as ZWDA-24HI1N4-M-SE18	2 tons24,000 Btu/h · Ducted	103%	1.94	9.5	25,800	19.0	CEE 25CEE 26Xcel	1	217022533	Ducted, 2 tons	70.4
2ZOC-24HIN4-M-SE18HiCongowith ducted air handler ZVMXFA-24HI1N4-C-M-SE18	2 tons23,000 Btu/h · Ducted	100%	1.82	10.1	25,000	17.3	CEE 25CEE 26Xcel	1	218647966	Ducted, 2 tons	70.0
3ZOD-36HIN4-M-SE18HiCongowith ducted air handler ZVMXFB-36HI1N4-C-M-SE18	3 tons36,000 Btu/h · Ducted	115%	1.80	10.1	42,500	17.1	CEE 25CEE 26Xcel	1	218647967	Ducted, 2.5–3 tons	69.2
4ZOT6P-24HIN4-M-SE20iCongowith ducted air handler ZVMXFB-24HI1N4-M-SE20	2 tons24,000 Btu/h · Ducted	88%	2.30	8.5	21,000	19.7	CEE 25CEE 26Xcel	2	217902688	Ducted, 2 tons	68.6
5ZODA-48HIN4-M-SE18H*iCongowith ducted air handler ZVMXFC-48HI1N4-C-M-SE18	4 tons48,000 Btu/h · Ducted	96%	1.85	9.3	48,000	17.1	CEE 25CEE 26Xcel	1	218673039	Ducted, 3.5–4.5 tons	66.2

All-around best

Top 5 iCongo 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
1ZOT6P-24HIN4-M-SE20iCongowith ducted air handler ZVMXFB-24HI1N4-M-SE20	2 tons24,000 Btu/h · Ducted	88%	2.30	8.5	19.7	12.5	CEE 25CEE 26Xcel	2	217902688	Ducted, 2 tons	76.9	68.6	85.1	68.6
2ZWDA-24HI1N4-M-SE18iCongoAlso listed as ZWDA-24HI1N4-M-SE18	2 tons24,000 Btu/h · Ducted	103%	1.94	9.5	19.0	12.2	CEE 25CEE 26Xcel	1	217022533	Ducted, 2 tons	73.5	70.4	76.6	70.4
3ZWDA-48HI1N4-M-SE18iCongoAlso listed as ZWDB-48HI1N4S4-M-SE18	4 tons48,000 Btu/h · Ducted	93%	1.80	9.0	19.0	11.2	CEE 25CEE 26Xcel	1	217022535	Ducted, 3.5–4.5 tons	65.5	60.3	70.8	60.3
4ZWDA-48HI1N4-M-SE18*iCongo	4 tons48,000 Btu/h · Ducted	93%	1.80	9.0	19.0	11.2	CEE 25CEE 26Xcel	1	218814635	Ducted, 3.5–4.5 tons	65.5	60.2	70.8	60.2
5ZWDA-60HI1N4-M-SE18iCongo	4.5 tons55,000 Btu/h · Ducted	81%	1.82	9.0	18.5	10.6	CEE 25CEE 26Xcel	1	217022536	Ducted, 3.5–4.5 tons	57.9	56.9	58.9	56.9

Best model on each rating

iCongo’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	ZOT6PA-42HN4-M-SE14.3	2.80	Ducted, 3.5–4.5 tons	99%	218378429
Capacity retention at 5°F	ZOD-36HIN4-M-SE18H	115%	Ducted, 2.5–3 tons	99%	218647967
HSPF2	ZOD-36HIN4-M-SE18H	10.1	Ducted, 2.5–3 tons	87%	218647967
SEER2	ZOT6P-36HIN4-M-SE20	19.3	Ducted, 2.5–3 tons	86%	217902689
EER2	ZOT6P-24HIN4-M-SE20	12.5	Ducted, 2 tons	81%	217902688
Heating capacity at 5°F	ZOD-36HIN4-M-SE18H	42,500 Btu/h	Ducted, 2.5–3 tons	100%	218647967

All 47 iCongo models in Explore

iCongo 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.

iCongo: 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	45.5(50 is the typical model of its size class)ZOC-18HIN4-M-SE18with ducted air handler ZVMQFA-18HIN4L-M-SE152 of 3 models qualify · AHRI 217902692	38.9(50 is the typical model of its size class)ZOC-18HIN4-M-SE18with ducted air handler ZVMXFA-18HI1N4-C-M-SE183 of 3 models have all five ratings · AHRI 217022537
Ducted, 2 tons	70.4(50 is the typical model of its size class)ZWDA-24HI1N4-M-SE18Also listed as ZWDA-24HI1N4-M-SE189 of 10 models qualify · AHRI 217022533	76.9(50 is the typical model of its size class)ZOT6P-24HIN4-M-SE20with ducted air handler ZVMXFB-24HI1N4-M-SE2010 of 10 models have all five ratings · AHRI 217902688
Ducted, 2.5–3 tons	69.2(50 is the typical model of its size class)ZOD-36HIN4-M-SE18Hwith ducted air handler ZVMXFB-36HI1N4-C-M-SE183 of 12 models qualify · AHRI 218647967	54.1(50 is the typical model of its size class)ZOT6P-36HIN4-M-SE20with ducted air handler ZVMXFB-36HI1N4-M-SE2012 of 12 models have all five ratings · AHRI 217902689
Ducted, 3.5–4.5 tons	66.2(50 is the typical model of its size class)ZODA-48HIN4-M-SE18H*with ducted air handler ZVMXFC-48HI1N4-C-M-SE1811 of 22 models qualify · AHRI 218673039	65.5(50 is the typical model of its size class)ZWDA-48HI1N4-M-SE18Also listed as ZWDB-48HI1N4S4-M-SE1822 of 22 models have all five ratings · AHRI 217022535

All-around board, every manufacturer

Newest iCongo certifications

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

The 5 most recently certified iCongo outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
ZOT6PA-60HIN4-M-SE15iCongowith indoor coil ZVDH3-4860N4L and furnace CG7-80-120D	4.5 tons51,000 Btu/h · Ducted	1.65	58%	7.5	14.3	None	6	218827222
ZOT6PA-48HIN4-M-SE15iCongowith indoor coil ZVDH3-4860N4L and furnace CG7-80-120D	4 tons46,000 Btu/h · Ducted	1.70	57%	7.8	14.3	None	6	218827219
ZOT6P-36HIN4-M-SE15iCongowith indoor coil ZVCH2-3036N4L and furnace CG7-80-100C	3 tons34,200 Btu/h · Ducted	1.68	53%	7.5	15.2	None	8	218827216
ZOT6P-30HIN4-M-SE15iCongowith indoor coil ZVCH2-3036N4L and furnace CG7-80-100C	2.5 tons29,000 Btu/h · Ducted	1.72	55%	7.8	15.2	None	8	218827212
ZOT4P-24HIN4-M-SE15iCongowith indoor coil ZVBH1-1824N4L and furnace CG7-80-080B	2 tons24,000 Btu/h · Ducted	1.70	54%	7.8	15.2	None	5	218827208

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Manufacturers of a similar size, side by side.

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