Century heat pump efficiency: 59 outdoor models compared

Century has 59 heat pump outdoor models certified with this refrigerant group, in 1,147 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 Century makes. Century 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: 59
AHRI certifications: 1,147
Efficiency index: 50%; Typical model vs same-size, same-type peers (68 models)
Meet CEE 2025: 44.1%; 26 models

How Century 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.

Century against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Century’s own modelsCentury is strongest on EER2 (its typical model beats 53% of comparable models) and weakest on SEER2 (45%).

Century
Middle half of its models
Other ranked manufacturers

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

Average peer percentile of Century’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index68 models scored	50%	Not ranked	—
COP at 5°F68 models scored	50%	Not ranked	1.98
Capacity retention at 5°F68 models scored	49%	Not ranked	63%
HSPF268 models scored	52%	Not ranked	8.1
SEER268 models scored	45%	Not ranked	15.2
EER268 models scored	53%	Not ranked	11.4
Heating capacity at 5°F68 models scored	49%	Not ranked	19,000 Btu/h

Standards met

Share of Century’s models with at least one qualifying certification
Standard	Share	Models
CEE 2025 Tier 1 (Split ASHP)	44.1%	26
CEE 2026 Tier 1 (Split ASHP)	44.1%	26
CEE Advanced Tier (Split ASHP)	3.4%	2
Xcel Energy Colorado cold-climate ASHP (2025)	40.7%	24
DOE Cold Climate Heat Pump Challenge	3.4%	2
ENERGY STAR Cold Climate	32.2%	19

Sizes and duct types offered

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

Century’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

Century (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	8	72%	69%	71%	69%
Ducted, 2 tons	13	41%	47%	43%	37%
Ducted, 2.5–3 tons	14	42%	48%	40%	34%
Ducted, 3.5–4.5 tons	21	39%	42%	39%	39%
Non-ducted, up to 1.5 tons	6	77%	60%	84%	69%
Non-ducted, 2 tons	1	76%	94%	98%	49%
Non-ducted, 2.5–3 tons	3	67%	46%	83%	57%
Non-ducted, 3.5–4.5 tons	2	67%	52%	82%	70%

Every Century model in the market

Century’s 68 models with a known size and duct type, over the shape of the whole catalog.

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

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

Dots: 68 century 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 Century 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 Century 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
1A-VHP06SA-1CENTURY · A Serieswith ductless indoor unit B-VHP06SA-1	0.5 tons6,000 Btu/h · Non-ducted	110%	2.40	14.8	7,700	25.5	CEE 25CEE 26CEE AdvXcelDOEES CC	2	218425153	Non-ducted, up to 1.5 tons	96.7
2A-VHP24SA-1CENTURY · A Serieswith ductless indoor unit B-VHP24CA-1	2 tons23,400 Btu/h · Non-ducted	95%	2.23	11.6	23,800	20.7	CEE 25CEE 26XcelES CC	5	217482468	Non-ducted, 2 tons	89.4
3A-VXP18SA-1CENTURY · A Serieswith ducted air handler WXP18SA	1.5 tons18,000 Btu/h · Ducted	103%	2.10	10.8	19,600	19.3	CEE 25CEE 26CEE AdvXcelDOEES CC	4	217482412	Ducted, up to 1.5 tons	86.6
4A-ZHP09SA-1CENTURY · A-ZHP Serieswith ductless indoor unit B-ZHP09SA-1	1 ton9,000 Btu/h · Non-ducted	113%	2.00	14.6	13,500	33.3	CEE 25CEE 26XcelES CC	1	218404564	Non-ducted, up to 1.5 tons	85.9
5A-VHP24SA-1CENTURY · A Serieswith ducted air handler B-VHP24DA-1	2 tons24,000 Btu/h · Ducted	92%	2.18	11.7	24,000	19.0	CEE 25CEE 26XcelES CC	5	217482470	Ducted, 2 tons	85.7

All-around best

Top 5 Century 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
1A-VHP06SA-1CENTURY · A Serieswith ductless indoor unit B-VHP06SA-1	0.5 tons6,000 Btu/h · Non-ducted	110%	2.40	14.8	25.5	18.0	CEE 25CEE 26CEE AdvXcelDOEES CC	2	218425153	Non-ducted, up to 1.5 tons	96.2	96.7	95.7	96.7
2A-ZHP09SA-1CENTURY · A-ZHP Serieswith ductless indoor unit B-ZHP09SA-1	1 ton9,000 Btu/h · Non-ducted	113%	2.00	14.6	33.3	17.0	CEE 25CEE 26XcelES CC	1	218404564	Non-ducted, up to 1.5 tons	92.3	85.9	98.7	85.9
3A-VHP09SA-1CENTURY · A Serieswith ducted air handler B-VHP09DA-1	1 ton9,000 Btu/h · Ducted	120%	1.85	13.8	20.5	14.0	CEE 25CEE 26XcelES CC	5	217482458	Ducted, up to 1.5 tons	86.5	79.9	93.2	79.9
4A-VHP486A-1CENTURY · A Series	4 tons47,000 Btu/h · Ducted	100%	2.00	11.0	20.4	11.7	CEE 25CEE 26XcelES CC	3	218425169	Ducted, 3.5–4.5 tons	83.9	82.7	85.1	82.7
5A-ZHP15SA-1CENTURY · A-ZHP Serieswith ducted air handler B-ZHP15SA-1	1.5 tons15,000 Btu/h · Ducted	90%	2.00	11.0	27.0	13.0	CEE 25CEE 26XcelES CC	1	218404563	Ducted, up to 1.5 tons	83.9	75.1	92.7	75.1

Best model on each rating

Century’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	SHP1448S1A	2.75	Ducted, 3.5–4.5 tons	98%	218426983
Capacity retention at 5°F	A-VHP09SA-1	126%	Non-ducted, up to 1.5 tons	98%	217482457
HSPF2	A-VHP06SA-1	14.8	Non-ducted, up to 1.5 tons	99%	218425153
SEER2	A-ZHP15SA-1	27.0	Ducted, up to 1.5 tons	100%	218404563
EER2	A-VHP06SA-1	18.0	Non-ducted, up to 1.5 tons	99%	218425153
Heating capacity at 5°F	A-VXP18SA-1	19,600 Btu/h	Ducted, up to 1.5 tons	98%	217482412

All 59 Century models in Explore

Century 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.

Century: 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	86.6(50 is the typical model of its size class)A-VXP18SA-1with ducted air handler WXP18SA6 of 8 models qualify · AHRI 217482412	86.5(50 is the typical model of its size class)A-VHP09SA-1with ducted air handler B-VHP09DA-18 of 8 models have all five ratings · AHRI 217482458
Ducted, 2 tons	85.7(50 is the typical model of its size class)A-VHP24SA-1with ducted air handler B-VHP24DA-17 of 14 models qualify · AHRI 217482470	78.4(50 is the typical model of its size class)A-VHP24SA-1with ducted air handler B-VHP24DA-112 of 12 models have all five ratings · AHRI 217482470
Ducted, 2.5–3 tons	82.5(50 is the typical model of its size class)A-VHP365A-14 of 13 models qualify · AHRI 218425166	83.6(50 is the typical model of its size class)A-VHP365A-113 of 13 models have all five ratings · AHRI 218425166
Ducted, 3.5–4.5 tons	82.7(50 is the typical model of its size class)A-VHP486A-18 of 21 models qualify · AHRI 218425169	83.9(50 is the typical model of its size class)A-VHP486A-122 of 22 models have all five ratings · AHRI 218425169
Ducted, 5 tons and up	No models in this size class	66.7(50 is the typical model of its size class)HSA1460S1-*Awith ducted air handler HMA60VX1-1 of 1 models have all five ratings · AHRI 216370485
Non-ducted, up to 1.5 tons	96.7(50 is the typical model of its size class)A-VHP06SA-1with ductless indoor unit B-VHP06SA-16 of 6 models qualify · AHRI 218425153	96.2(50 is the typical model of its size class)A-VHP06SA-1with ductless indoor unit B-VHP06SA-16 of 6 models have all five ratings · AHRI 218425153
Non-ducted, 2 tons	89.4(50 is the typical model of its size class)A-VHP24SA-1with ductless indoor unit B-VHP24CA-11 of 1 models qualify · AHRI 217482468	76.4(50 is the typical model of its size class)A-VHP24SA-1with ductless indoor unit B-VHP24SA-11 of 1 models have all five ratings · AHRI 218425157
Non-ducted, 2.5–3 tons	78.0(50 is the typical model of its size class)A-VHP365A-13 of 3 models qualify · AHRI 218425167	78.3(50 is the typical model of its size class)A-VHP365A-13 of 3 models have all five ratings · AHRI 218425165
Non-ducted, 3.5–4.5 tons	73.4(50 is the typical model of its size class)A-VHP486A-12 of 2 models qualify · AHRI 218425170	75.6(50 is the typical model of its size class)A-VHP486A-12 of 2 models have all five ratings · AHRI 218425168

All-around board, every manufacturer

Newest Century certifications

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

The 5 most recently certified Century outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
HSA1936V1-**ACentury · HSA19 SERIESwith ducted air handler HMAS24CX1S-	2 tons23,800 Btu/h · Ducted	1.70	57%	7.5	19.5	CEE 25CEE 26Xcel	148	218598197
HSA1436S1-**ACentury · HSA14 SERIESwith ducted air handler HMAS42CX1S-	3 tons36,000 Btu/h · Ducted	1.96	53%	7.8	15.2	None	80	218499736
HSA1460S1-**ACenturywith indoor coil D(A,C,E)60A4J+TDR and furnace GUH92C110C5MP	4.5 tons52,000 Btu/h · Ducted	2.40	61%	7.5	14.3	None	17	218427188
HSA1448S1-**ACenturywith indoor coil D(A,C,E)60A4J+TDR and furnace GUH92C110C5MP	3.5 tons44,000 Btu/h · Ducted	2.43	63%	7.8	14.8	None	82	218427184
HSA1442S1-**ACenturywith indoor coil D(A,C,E)48B4J+TDR and furnace GUH92C110C5MP	3 tons38,500 Btu/h · Ducted	2.54	63%	7.5	15.2	None	87	218427165

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