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The Best casement window air conditioner of 2021 – Reviewed and Top Rated

We analyzed a large number of reviews from the current online market, and we found the best top 10 of casement window air conditioner in 2021. Check our product ranking below.

2642 Reviews Scanned

NO. 1


Keystone 8,000 BTU Slider/Casement Window AC, White

5 ratings

Keystone 8,000 BTU Slider/Casement Window AC, White

  • Installs in Horizontal Slider or Casement windows (Does not work for standard double hung windows)
  • 350 Sq. Ft. of cooling coverage keeps your bedroom or office cool
  • 3 fan speeds give you control on the amount of cooling in your home
  • 4-way air direction control allows you to direct the air where you want it
  • Easy to use touch button control panel makes selecting your desired setting a breeze
NO. 2


habibee 197

47 ratings

habibee 197″(500CM) Universal Window Seal for Portable Air Conditioner and Tumble Dryer, Sealing AC with Zip and Adhesive Fastener, Hot Air Stop, Easy to Install, No Need for Drilling Holes – White

  • UNIVERSAL – Suitable for portable mobile air conditioners, dryers, exhaust dryers and dehumidifiers.Fits window with a maximum perimeter of 500cm (196″).Suitable for sloping/casement windows.Not Suitable for hung/slider windows.
  • HIGH QUALITY MATERIALS – Made of 190T polyester and environmentally friendly waterproof PU coated fabric.With self-locking zipper, it has very good adhesion but leaves no trace after tearing off. habibee window seal leaves out insects, mosquitoes, rain and creates a “closed environment” that keeps your room cool for longer.
  • INCREASE COOLING PERFORMANCE – Enjoy a cooler environment in summer thanks to habibee! habibee seals around your open window and then zips around the nozzle of your hose and blocks the return flow of warm air, so that your mobile air conditioning unit can be more efficient and cools your room in less time.
  • EASY TO INSTALL – You don’t have to buy window kits, adapters for your hose or additional tools.Simply apply the adhesive hook tape to the inside of your window frame and to the window itself. Attach the window seal to the hook tape. Then, open the zip on the window seal and place your air conditioner hose out of the window. In the end, close the zip tightly around the hose.
  • AFTER-SALES GUARANTEE:-For any quality problems, we will refund or replace underno conditional. We will provide you with high-quality products and affectionate service, if you have any questions, please feel free to contact us, we will reply you within 24 hours.
NO. 3


Forestchill Portable Air Conditioner Window Seal Plates Kit for 5

20 ratings

Forestchill Portable Air Conditioner Window Seal Plates Kit for 5″ Diameter Exhaust Hose, Universal AC Vent Kit for Sliding Windows and Hung Windows, Adjustable Length Sealing Panels for Mobile A/C

  • Save Energy – This window seal kit is specially designed for portable air conditioner, isolate hot air from entering the room and keep your room cool
  • Adjustable Size -Total three sealing plates can be freely adjusted to fit window from 16.5″ to 47″, max length 47 in. Compatible with portable air conditioner exhaust hose with 5″ diameter
  • Durable Material – Made of high quality PVC material, light weight and durable, suitable for slide windows and hung window (NOT suitable for casement window)
  • Quick Installation – Easy screw the hose to hole in seal plate, adjust seal plate for desired length to fit your window, and install it to the window, perfect done! Instruction sheet included in the package
  • Package Includes – 3 x window seal plates, 1 x bird guard, a set of screws, 1 x instruction sheet
NO. 4


ANYAIR Universal Window Seal for Portable Air Conditioners, Casement Windows Only, Easy to Install, 118 inches x 16 inches

562 ratings

ANYAIR Universal Window Seal for Portable Air Conditioners, Casement Windows Only, Easy to Install, 118 inches x 16 inches

  • Our window kit includes: 15” x 5” in Diameter Exhaust Hose, Rear Panel Hose Connector, Window Panel Hose Connector, Window Panels
  • Extra Long – Collapsed 15 inch, Extendable up to 62 inch.
  • Durable and portable, With high quality flexible polypropylene material, easy to install.
  • Your window slider kit has been designed to fit most standard “Vertical” and “Horizontal” window applications; however, it will be necessary for you to verify the exhaust hose will fit your unit exhaust.
  • Window Openings: MINIMUM: 20 INCHES / MAXIMUM: 38 INCHES
NO. 5


Koldfront WTC12012WCO230V 12,000 BTU 230V Through the Wall Air Conditioner - Cool Only

39 ratings

Koldfront WTC12012WCO230V 12,000 BTU 230V Through the Wall Air Conditioner – Cool Only

  • 12,000 BTU cooling; Coverage area 450-550 square feet; EER 10.5; Remote control included
  • PLEASE NOTE: This is a 230V unit and requires a 230V outlet, see image for appropriate outlet; Plug type LCDI 6-15P
  • Temperature Range: 62° F – 86° F; Sleep mode; 24 hour timer; Energy saver feature; Control panel with digital display
  • Dimensions: 14.5″ H x 24.2″ W x 20.3″ D; Weight: 76.1 lbs; Dehumidifier function; Power cord length 6 1/2 ft
  • Compatible with the Koldfront wall air conditioner sleeve (WTCSLV) sold separately; For a 14,000 BTU version of this unit see model WTC14012WCO230V and 10,000 BTU see WTC10012WCO230V
NO. 6


AGPTEK 300cm Window Seal for Portable Air Conditioner, 118 inch Mobile AC Unit Soft Cloth Sealing, Stop Hot Air with Zip and Adhesive Fastener-no Need for Drilling Holes for Tilt Window

127 ratings

AGPTEK 300cm Window Seal for Portable Air Conditioner, 118 inch Mobile AC Unit Soft Cloth Sealing, Stop Hot Air with Zip and Adhesive Fastener-no Need for Drilling Holes for Tilt Window

  • ❉【Environmental Protection & Energy Saving in Summer】- The window seal for portable air-conditioners Block the return of hot air and reduce the power consumption effectively, save electricity charges. More Energy Saving, Enjoy the cool summer!
  • ❉ 【 Wide Application】: Suitable for portable mobile air conditioners, dryers, exhaust dryers and dehumidifiers. The window seal has a length of 3M. Suitable for commonly-used tilting window types no matter whether it open to the left or open to the right, bottom hung windows or skylight. Note: it cannot be mounted on sliding windows and doors.
  • ❉ 【Easy To Install】- No need for drilling holes or additional tools. Simply apply the adhesive hook tape to the inside of your window frame and to the window itself. Attach the window seal to the hook tape. Then, open the zip on the window seal and place your air conditioner hose out of the window. Close the zip tightly around the hose.
  • ❉ 【Premium Material 】Made of 190T polyester and environmentally friendly waterproof PU coated fabric.With self-locking zipper, it has very good adhesion but leaves no trace after tearing off. Also effectively insulate insects, dust, etc. into the room.
  • ❉【Convenience And Economy】You can open or close the window at any time without removing the window seal. Once the weather turns chilly, you can also remove it and install it again next summer to save your money!
NO. 7


KWNOEA 400cm/157Is. Universal Window Seal for Portable Air Conditioner and Tumble Dryer. Easy to Install - Air Exchange Guards with Zip and Adhesive Fastener

33 ratings

KWNOEA 400cm/157Is. Universal Window Seal for Portable Air Conditioner and Tumble Dryer. Easy to Install – Air Exchange Guards with Zip and Adhesive Fastener

  • ✅【Easy to Install or remove& No need for drilling holes】 With portable air conditioner window seal kit&{Stick→Unzip →Place air conditioner hose out→Zip up→Finish !}&{The window can be closed despite window sealing}
  • ✅【100% High density seal & Save energy and money】Our window seal prevents the warm air exhaust air from returning into the room &{Reduce energy consumption and electricity bills }&{keep out rain, insects, and mosquitoes.}& Keep a closed ,cooler comfortable environment in summer
  • ✅【Widely Compatible】Fit with all hose diameters + suitable for portable mobile air conditioners, dryers, exhaust dryers, and dehumidifiers + suitable for air conditioner casement window that have a crank handle whether for outward or inward open ,bottom hung windows and skylight【CANNOT suitable for left and right sliding window , up and down pushing windows】+Fit window with a maximum perimeter of 400 CM(157”)【If you window is smaller than the max of window seal.It can fold up to use easily】
  • ✅【Why Choose Us?】KWNOEA window seal is high density nano waterproof material & Strong Velcro tape is easy to Install or remove & The window seal have unique zipper and double whipstitch design & Great produce for a great price
  • ✅Package Content: Window Seal for Air Condition + 24*7 hours prompt after-sales seervice
NO. 8


Pearwow Window Air Conditioner Support Bracket Light Duty,Up to 85 lbs,Designed for Universal AC Unit Fit 5,000 to 10,000 BTU

7 ratings

Pearwow Window Air Conditioner Support Bracket Light Duty,Up to 85 lbs,Designed for Universal AC Unit Fit 5,000 to 10,000 BTU

  • ?STRONG QUALITY:Heavy-gauge, epoxy-coated steel construction for durability and long lasting.Support A/C unit on window and transfer stress from window to bracket. Suitable for cement, brick and wood window.
  • ?UNIVERSAL DESIGN:Compatible with most window units, designed for 5,000 to 10,000 BTU A/C unit.And safely supports up to 85 lbs.
  • ?WALL THICKNESS:Fits wall thickness from 4″ to 13″, built-in bubble level to correct mounting slope position.
  • ?ADJUSTABLE:Adjust the support leg to fit your window and adapt different mounting positions.
  • ?EASY INSTALLATION:This window AC bracket allows quick and easy installation, whole installation can be done on the inside of house. No drilling on outside wall or siding(require drilling on window or window sill).
NO. 9


Vodche 400cm Window Seal for Portable Air Conditioner and Tumble Dryer, 158inch Window Seal with Adhesive Fastener for Each Mobile Air-Conditioning Unit, Easy to Install, No Need Drilling Holes

24 ratings

Vodche 400cm Window Seal for Portable Air Conditioner and Tumble Dryer, 158inch Window Seal with Adhesive Fastener for Each Mobile Air-Conditioning Unit, Easy to Install, No Need Drilling Holes

  • 【Drive Away Hot Air & Keep Room Cool 】The Window Seal Kits locking the hose between the window frame and the window itself, which can prevent hot air from entering, keeps your room cool for a long time;in addition, Our Portable Window Seal can leave out insects, mosquitoes, rain and creates a “safe environment” .
  • 【Eco-friendly & Reduce Energy Consume】We advocate protecting the earth environment, the window seal contributes to reduce energy consumption and to lower carbon dioxide emissions; Effectively Preventing warm air circulating in your room when you use the air conditioner in summer, and the window seal kits helps you save money on electrical bills!
  • 【Easy to Use & No Tools Required 】No need to extra window kits, you can complete this independently; Simply apply the adhesive hook tape to the inside of your window frame and the window itself. Attach the window seal to the hook tape. Second, open the zip on the window seal and place your air conditioner hose out of the window. Finally, close the zip tightly around the hose. Your windows also can be closed and opened normally!
  • 【Suitable Size & Fit All Hose Diameters】 Window Seal suitable for all portable air conditioners and tumble dryers; The window seal length is 158in/400cm, could use in window with a maximum perimeter of 400 CM. Suitable for standard windows, bottom hung windows or skylights. Note: NOT suitable for center pivot window, sliding windows and doors.
  • 【Waterproof & Easy to Clean】The window seal is water resistant and washable, easy to self-assembly, when summer is over, you can clean it and keep it as good as new. It is definitely a good companion for your home life. and If you have any questions please contact us, we will provide the best service for you.
NO. 10


Air Jade Portable Air Conditioner Window Kit, Slide Window Vent Kit for Portable AC Exhaust Hose with 5.9

7 ratings

Air Jade Portable Air Conditioner Window Kit, Slide Window Vent Kit for Portable AC Exhaust Hose with 5.9″ Diameter

  • Widely Application: Compatible with various sliding window or hung window (but NOT fit for casement window), 3 adjustable length panels to fit window size from 16.5 in to 47 in
  • Energy Saver: Block the gap between window and poratable air conditioner exhause hose, avoid the hot air getting in and cold air getting out. Come with a sealing foam tape for better insulation
  • Great Quality: Reliable PVC material, light weight and durable. A must-have portable A/C accessory, provide an easy access for your portable A/C exhaust hose, can move from one window to another without extra tool
  • Easy to Install: Easy to install, and easy to remove when not in use. First install your hose to the AC, and then screw your hose to seal plate, adjust seal plates’ length to fit your window, apply sealing foam tape to window, finally, install seal plates to window
  • Universal Fit: Suitable for all portable air conditoners exhaust hose with 5.9in diameter, please kindly check if your portable AC model is compatible with the aforementioned size before purchasing

Where to Buy The Best casement window air conditioner?

Do you always want shop for a great casement window air conditioner but don’t know where to go? And have trouble deciding which one to buy? Yes, we have been there, we have gone through the whole process, so now we are here to help.

It’s important that you do your own research on the casement window air conditioner you need. We’ve put together a comprehensive list of the greatest casement window air conditioner available in the market today. We’ve also put together a list of questions you may want to know :

  • Is it worth buying a casement window air conditioner?
  • What are the advantages of buying a casement window air conditioner?
  • What should be considered when buying an effective casement window air conditioner?
  • Why is it important to get the best casement window air conditioner?
  • Is there any well-known good casement window air conditioner in the market and what are they?
  • Where can we find the info about casement window air conditioner
  • You may have more questions in addition to what has been already listed, and as far as I am concerned, the best way to meet your satisfaction in this subject is to get as much information as you can from reliable online sources.

Potential reliable sources :

  • Rating web sites
  • Word of mouth communication
  • Product views
  • Word of mouth communication
  • Online Forums
  • Celebrity evaluation video


To get the best casement window air conditioner, it’s crucial to do the research thoroughly and carefully, most importantly, make sure that all the information you are using are from trustworthy sources and highly reliable.

We have used AI and Big Data to proofread all the collected information for the casement window air conditioner buying guide. We made it with a custom-created selection of algorithms, which let us get the top-10 list of the best available casement window air conditioner currently available on the market.

We made our list depending on variety of factors as following :

Brand ValueEvery brand of casement window air conditioner has a value of its own.Most of them have unique sales characteristics.
FeaturesThe special part of the casement window air conditioner
Product ValueHow much you will get from your casement window air conditioner
Customer RatingsObjective effect
Customer ReviewsThis gives you first-hand and detailed information from real-world users
Product QualityThe real important one, how it really works.
Product ReliabilityService life, after-sales service, etc.

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