LITHZEN heat pump efficiency: 6 outdoor models compared

LITHZEN has 6 heat pump outdoor models certified with this refrigerant group, in 6 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 LITHZEN makes. LITHZEN 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 9, 2026updated Oct 10, 2026 · sources

Outdoor models: 6
AHRI certifications: 6
Efficiency index: —; No model has all five ratings
Meet CEE 2025: 0%; 0 models

How LITHZEN 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.

LITHZEN against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of LITHZEN’s own modelsLITHZEN is strongest on EER2 (its typical model beats 13% of comparable models) and weakest on HSPF2 (3%).

LITHZEN
Middle half of its models
Other ranked manufacturers

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

Average peer percentile of LITHZEN’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index0 models scored	—	Not ranked	—
COP at 5°F0 models scored	—	Not ranked	—
Capacity retention at 5°F0 models scored	—	Not ranked	—
HSPF26 models scored	3%	Not ranked	8.0
SEER26 models scored	10%	Not ranked	17.0
EER26 models scored	13%	Not ranked	9.7
Heating capacity at 5°F0 models scored	—	Not ranked	—

Standards met

Share of LITHZEN’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.

LITHZEN’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

LITHZEN (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
Non-ducted, up to 1.5 tons	5	—	—	3%	11%
Non-ducted, 2 tons	1	—	—	1%	4%

Every LITHZEN model in the market

LITHZEN’s 6 models with a known size and duct type, over the shape of the whole catalog.

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

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

Dots: 6 lithzen 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 LITHZEN 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

No LITHZEN model keeps at least 70% of its heat at 5°F with all three cold-climate ratings.

All-around best

No LITHZEN model has all five all-around ratings.

Best model on each rating

LITHZEN’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	—	—	—	—	—
Capacity retention at 5°F	—	—	—	—	—
HSPF2	FP11302US-12WH	8.2	Non-ducted, up to 1.5 tons	4%	218425014
SEER2	FP11302US-12WH	18.1	Non-ducted, up to 1.5 tons	15%	218425014
EER2	FP11303US-12WH	10.8	Non-ducted, up to 1.5 tons	25%	218425015
Heating capacity at 5°F	—	—	—	—	—

All 6 LITHZEN models in Explore

LITHZEN 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.

LITHZEN: 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
Non-ducted, up to 1.5 tons	None on this board (0 of 5 models qualify)	None on this board (0 of 5 models have all five ratings)
Non-ducted, 2 tons	None on this board (0 of 1 models qualify)	None on this board (0 of 1 models have all five ratings)

All-around board, every manufacturer

Newest LITHZEN certifications

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

The 5 most recently certified LITHZEN outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
FP11274US24K-12WHLITHZENwith ductless indoor unit FP11274US24K-22WH	2 tons24,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	218461367
FP11274US18K-12WHLITHZENwith ductless indoor unit FP11274US18K-22WH	1.5 tons18,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	218461366
FP11274US12K-12WHLITHZENwith ductless indoor unit FP11274US12K-22WH	1 ton12,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	218461365
FP11273US12K-12WHLITHZENwith ductless indoor unit FP11273US12K-22WH	1 ton12,000 Btu/h · Non-ducted	—	—	8.0	17.0	None	1	218461364
FP11303US-12WHLithzenwith ductless indoor unit FP11303US-22WH	1 ton12,000 Btu/h · Non-ducted	—	—	8.2	18.1	None	1	218425015

Shares hardware with

Manufacturers whose models are the same equipment under another badge. About OEM families

No shared hardware found for LITHZEN in this group.

Compare LITHZEN

Manufacturers of a similar size, side by side.

Compare with any manufacturer

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