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Split systems

4-ton split systems

Rated products: 153 · model numbers: 361 · certified cooling 44,000–49,999 Btu/h

Of the 7 split-system size classes on this site, the 4-ton class has the second-highest median share kept at 5°F. The Lennox SL22KLV-048-230A keeps the largest share of its 47°F capacity at 5°F. The Samyou VUH48-VA6BA(O) lists the top HSPF2 and the ACIQ B5H3V48…K…AAA the top SEER2.

020k40k60k47°F5°FBtu/hOne line per rated product, 47°F to 5°F, in its best 5°F match.Lennox SL22KL…class median020k40k60k47°F5°FBtu/hOne line per rated product,47°F to 5°F, best 5°F match.Lennox …median

What the class is made of

Compressor staging

variable-speed
110
single-stage
20
two-stage
23

Refrigerant

R-454B
94
R-410A
42
R-32
17

Most listed brands: American Standard (12), Friedrich (7), AC PRO (6), TCL (6), Airquest (5), GE (5), Lennox (5), and MDV (5).

Highest in the class, rating by rating

RatingHighestValueNext value down
Kept at 5°FLennox SL22KLV-048-230A103%1HVAC ACIQ-48-HPD, 100%
Output at 5°FTrane 5TCV0X61A155,500 Btu/hAI Air Conditioning AUO19-48N2-M3H-S, 52,000 Btu/h
COP at 5°FJohnson Controls THF2B48T21 (joint, with 1 more)2.84Hisense AOH-48U3T24P, 2.52
HSPF2Samyou VUH48-VA6BA(O)11MDX MCHA-48HDCTO2, 10.5
SEER2ACIQ B5H3V48…K…AAA (joint, with 2 more)23Carrier 27VNA348A…030, 22
EER2Bryant 249VAN048…AA (joint, with 1 more)13.5AirEase A7CP21V48P-…A, 13.4

Most heat kept at 5°F

EPA cold-climate designation only.

ProductKept at 5°FOutput at 5°FCOP at 5°FModel numbers
Lennox SL22KLV-048-230A103%46,500 Btu/h2.101
Trane 5TCV0X61A1100%55,500 Btu/h2.222
1HVAC ACIQ-48-HPD100%48,000 Btu/h2.0016
Cooper&Hunter CH-PQ48-230VO100%48,000 Btu/h2.002
Gree GUD48W2/NHE-D(U)100%48,000 Btu/h2.0010
Midea MO1HE-H48B-2A100%48,000 Btu/h2.002
MRCOOL UHP18048-O100%48,000 Btu/h2.001
TCL H48SDH20XQC100%48,000 Btu/h1.852
AUX AHU48HPV1BO98%48,000 Btu/h2.002
Daikin DH9VSA4810A96%44,000 Btu/h1.903

Filter this class in the cold finder

Next to the other split-system sizes

Share of 47°F capacity kept at 5°F: dot = class median, ring = 90th percentile.

40%60%80%100%120%1- and 1.5-ton2-ton2.5-ton3-ton3.5-ton4-ton5-ton40%60%80%100%120%1–1.5-ton2-ton2.5-ton3-ton3.5-ton4-ton5-ton

Certified as of October 27, 2026.