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Our Top 3 Best Keystone Air Conditioners (As Of April 2025) for the UK, Based On 100s Of Reviews

Here are the top 3 Keystone air conditioners followed by a list of their latest models:

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Best Model 2025
Alpha
Rank:
#1
Our
Score:
8.6/10
Confidence
Level:
OK
* How do we know? Here is how we rank items...
Keystone KSTAW15CE

Keystone KSTAW15CE

15100
BTU
cooling
52.5
db
Min. Noise
23.6
in.
Width
700
Sq. Ft.
Cool area
8.6Out Of 10
3 Sources
UK Model:Check Price
You Should Also Check Out: Top 10 Best 110V-120V Window Air Conditioners 2025
Second Best
Alpha
Rank:
#2
Our
Score:
8.7/10
Confidence
Level:
OK
Why is a higher score ranking under a lower score?
Keystone KSTSW10A

Keystone KSTSW10A

10000
BTU
cooling
23.5
in.
Width
450
Sq. Ft.
Cool area
8.7Out Of 10
3 Sources
UK Model:Check Price
You Should Also Check Out: Top 10 Best Energy-efficient Air Conditioners 2025
Also Good
Alpha
Rank:
#3
Our
Score:
8/10
Confidence
Level:
OK
Keystone KSTAP05PHA

Keystone KSTAP05PHA

9000
BTU
cooling
55
db
Min. Noise
52
db
Max. Noise
13
in.
Width
8Out Of 10
2 Sources
UK Model:Check Price
Also Good
Alpha
Rank:
#4
Our
Score:
8.5/10
Confidence
Level:
OK
Keystone KSTHW18A

Keystone KSTHW18A

18500
BTU
cooling
16000
BTU
heating
16000
BTU
Heating
25.4
in.
Width
8.5Out Of 10
2 Sources
UK Model:Check Price

The Two Latest Keystone (as Of May, 2025)

Keystone KSTHW18A

Keystone KSTHW18A

18500
BTU
cooling
16000
BTU
heating
16000
BTU
Heating
25.4
in.
Width
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.5Out Of 10
    2 Sources
    In UK:Check Price
    Keystone KSTHW25A

    Keystone KSTHW25A

    25000
    BTU
    cooling
    16000
    BTU
    heating
    16000
    BTU
    Heating
    25.4
    in.
    Width
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.3Out Of 10
    4 Sources
    In UK:Check Price

    Two Recent Keystone Air Conditioner Models

    Keystone KSTAW05A

    Keystone KSTAW05A

    5000
    BTU
    cooling
    55
    db
    Max. Noise
    38
    -dollar
    annual cost
    16.20
    in.
    Width
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.2Out Of 10
    4 Sources
    In UK:Check Price
    Keystone KSTAW06A

    Keystone KSTAW06A

    6000
    BTU
    cooling
    45
    -dollar
    annual cost
    16.20
    in.
    Width
    147
    CFM
    Max. Air flow
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • --Out Of 10
    In UK:Check Price

    Two Models

    Keystone KSTAW10B

    Keystone KSTAW10B

    10000
    BTU
    cooling
    52
    db
    Min. Noise
    60
    db
    Max. Noise
    80
    -dollar
    annual cost
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.5Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTAW12B

    Keystone KSTAW12B

    12000
    BTU
    cooling
    96
    -dollar
    annual cost
    21.5
    in.
    Width
    550
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • --Out Of 10
    In UK:Check Price

    Some Units

    Keystone KSTAW18C

    Keystone KSTAW18C

    17700
    BTU
    cooling
    54
    db
    Max. Noise
    23.6
    in.
    Width
    1000
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 6.6Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTAW15CE

    Keystone KSTAW15CE

    15100
    BTU
    cooling
    52.5
    db
    Min. Noise
    23.6
    in.
    Width
    700
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.6Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTSW10A

    Keystone KSTSW10A

    10000
    BTU
    cooling
    23.5
    in.
    Width
    450
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.7Out Of 10
    3 Sources
    In UK:Check Price

    A Few Quiet Models

    Keystone KSTAW06B

    Keystone KSTAW06B

    6000
    BTU
    cooling
    49
    db
    Min. Noise
    53
    db
    Max. Noise
    48
    -dollar
    annual cost
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • --Out Of 10
    In UK:Check Price
    Keystone KSTAW05B

    Keystone KSTAW05B

    5000
    BTU
    cooling
    49
    db
    Min. Noise
    55
    db
    Max. Noise
    40
    -dollar
    annual cost
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • --Out Of 10
    In UK:Check Price
    Don't miss: All the quiet air conditioners

    Two 8000 BTU Window Models

    Keystone KSTAW08C

    Keystone KSTAW08C

    8000
    BTU
    cooling
    60
    -dollar
    annual cost
    18.5
    in.
    Width
    350
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 9Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTAW08B

    Keystone KSTAW08B

    8000
    BTU
    cooling
    66
    -dollar
    annual cost
    18.5
    in.
    Width
    350
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.8Out Of 10
    5 Sources
    In UK:Check Price
    Don't miss: All the 8000 BTU window air conditioners

    Some Through-the-wall Units

    Keystone KSTAT12-2HC

    Keystone KSTAT12-2HC

    12000
    BTU
    cooling
    10600
    BTU
    heating
    61.5
    db
    Max. Noise
    10600
    BTU
    Heating
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.1Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTAT10-1C

    Keystone KSTAT10-1C

    10000
    BTU
    cooling
    53.1
    db
    Max. Noise
    20.3
    in.
    Width
    450
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.2Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTAT14-2HC

    Keystone KSTAT14-2HC

    14000
    BTU
    cooling
    10600
    BTU
    heating
    10600
    BTU
    Heating
    136
    -dollar
    annual cost
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.5Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTAT08-1HC

    Keystone KSTAT08-1HC

    8000
    BTU
    cooling
    4200
    BTU
    heating
    57
    db
    Max. Noise
    4200
    BTU
    Heating
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.1Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTAT14-2C

    Keystone KSTAT14-2C

    14000
    BTU
    cooling
    61.3
    db
    Max. Noise
    136
    -dollar
    annual cost
    24.2
    in.
    Width
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8Out Of 10
    5 Sources
    In UK:Check Price
    Keystone KSTAT10-2HC

    Keystone KSTAT10-2HC

    10000
    BTU
    cooling
    10600
    BTU
    heating
    10600
    BTU
    Heating
    94
    -dollar
    annual cost
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 9.1Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTAT12-1C

    Keystone KSTAT12-1C

    12000
    BTU
    cooling
    56.5
    db
    Max. Noise
    20.3
    in.
    Width
    550
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.5Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTAT08-1C

    Keystone KSTAT08-1C

    8000
    BTU
    cooling
    51.8
    db
    Min. Noise
    68
    -dollar
    annual cost
    24.2
    in.
    Width
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 9Out Of 10
    2 Sources
    In UK:Check Price
    Keystone KSTAT12-2C

    Keystone KSTAT12-2C

    12000
    BTU
    cooling
    56.5
    db
    Max. Noise
    20.3
    in.
    Width
    550
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 7.6Out Of 10
    2 Sources
    In UK:Check Price
    Don't miss: All the wall air conditioners

    A Few Small Portable Models

    Kenmore KSTAP14NA

    Kenmore KSTAP14NA

    14000
    BTU
    cooling
    16.4
    in.
    Width
    350
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • --Out Of 10
    2 Sources
    In UK:Check Price
    Keystone KSTAP06D

    Keystone KSTAP06D

    6000
    BTU
    cooling
    12.5
    in.
    Width
    200
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.3Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTAP08D

    Keystone KSTAP08D

    8000
    BTU
    cooling
    12.5
    in.
    Width
    100
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.3Out Of 10
    2 Sources
    In UK:Check Price
    Don't miss: All the small portable air conditioners

    Two Keystone 14000 BTU Portable Air Conditioners

    Keystone KSTAP14B

    Keystone KSTAP14B

    14000
    BTU
    cooling
    18.3
    in.
    Width
    400
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • --Out Of 10
    In UK:Check Price
    Keystone KSTAP14A

    Keystone KSTAP14A

    14000
    BTU
    cooling
    47
    db
    Min. Noise
    53
    db
    Max. Noise
    15.63
    in.
    Width
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • --Out Of 10
    In UK:Check Price
    Don't miss: All the 14000 BTU portable air conditioners

    And Two Of Their 12000 BTU Portable Air Conditioners

    Keystone KSTAP12NA

    Keystone KSTAP12NA

    12000
    BTU
    cooling
    18.3
    in.
    Width
    250
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.5Out Of 10
    3 Sources
    In UK:Check Price
    Keystone KSTAP12QD

    Keystone KSTAP12QD

    12000
    BTU
    cooling
    300
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 7.8Out Of 10
    In UK:Check Price
    Don't miss: All the 12000 BTU portable air conditioners

    Two Portable 8000 BTU Versions

    Keystone KSTAP05PHA

    Keystone KSTAP05PHA

    9000
    BTU
    cooling
    55
    db
    Min. Noise
    52
    db
    Max. Noise
    13
    in.
    Width
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8Out Of 10
    2 Sources
    In UK:Check Price
    Keystone KSTAP08MAC

    Keystone KSTAP08MAC

    8000
    BTU
    cooling
    49
    db
    Max. Noise
    16.6
    in.
    Width
    200
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.6Out Of 10
    2 Sources
    In UK:Check Price
    Don't miss: All the 8000 BTU portable air conditioners

    Two Portable 10000 BTU Models

    Keystone KSTAP10MA

    Keystone KSTAP10MA

    10000
    BTU
    cooling
    21.8
    in.
    Width
    150
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 6.9Out Of 10
    2 Sources
    In UK:Check Price
    Keystone KSTAP10NA

    Keystone KSTAP10NA

    10000
    BTU
    cooling
    16.5
    in.
    Width
    200
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.5Out Of 10
    2 Sources
    In UK:Check Price
    Don't miss: All the 10000 BTU portable air conditioners

    The Two Latest Keystone Energy-efficient Air Conditioners (as Of May, 2025)

    Kenmore KSTAW05CE

    Kenmore KSTAW05CE

    5000
    BTU
    cooling
    50.5
    db
    Min. Noise
    40
    -dollar
    annual cost
    16
    in.
    Width
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • --Out Of 10
    2 Sources
    In UK:Check Price
    Keystone KSTAW06C

    Keystone KSTAW06C

    6000
    BTU
    cooling
    51.9
    db
    Min. Noise
    44
    -dollar
    annual cost
    250
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 6.3Out Of 10
    2 Sources
    In UK:Check Price
    Don't miss: All the energy-efficient air conditioners

    Other models...

    Keystone KSTAP13MAC

    Keystone KSTAP13MAC

    13000
    BTU
    cooling
    49
    db
    Max. Noise
    18.7
    in.
    Width
    350
    Sq. Ft.
    Cool area
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • 8.6Out Of 10
    In UK:Check Price
    Keystone KSTAW12A

    Keystone KSTAW12A

    12000
    BTU
    cooling
    89
    -dollar
    annual cost
    21
    in.
    Width
    265
    CFM
    Max. Air flow
  • Learn About Our Ranking System & Anti-Fake Reviews Measures
    • --Out Of 10
    In UK:Check Price

    You Should Also Check Out...

    Top 10 Best 12000 BTU Window Air Conditioners 2025
    Top 10 Best 110V-120V Window Air Conditioners 2025
    Top 10 Best 21-inch Window Air Conditioners 2025
    Top 10 Best Wall Air Conditioners 2025
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