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Honeywell - 300 Sq. Ft. Portable Air Conditioner - White

Stay cool with this Honeywell MF08CESWW portable air conditioner that features up to a 300 sq. ft. cooling capacity to help keep your room comfortable. The 3-in-1 design features cooling, dehumidification and fan-only modes for versatility.

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    Key Specs

    • Voice Assistant Built-in
    • Recommended Room Size
      350 square feet
    • Air Conditioner Type
    • Auto Shut-Off
    • Sleep Mode
    • Window Venting Kit
    • Hose Configuration
    • No
    • Timer
    • Maximum Airflow Rate
      119 cubic feet per minute
    • Wi-Fi Enabled
    • App-Controlled
    • Remote Control
    • 8000 british thermal units
    • Number Of Fan Speeds
    • Integrated Heater
    • Number of Cool Settings
    Honeywell - 300 Sq. Ft. Portable Air Conditioner - White - Front_Standard
    (Doors closed)


    What's Included

    • Honeywell 8,000 BTU Portable Air Conditioner
    • Full-function remote
    • Washable, slide-out filter
    • Flexible exhaust hose, installation accessories
    • Owner's manual

    Ratings & Reviews

    Overall Customer Rating:
    67% of customers would recommend this product to a friend (14 out of 21)


    Up to 300 sq. ft. cooling capacity

    Keeps your designated room comfortable.

    Dehumidifier mode

    Reduces moisture in the air to help you breathe easily.

    Full-function remote

    Lets you operate the air conditioner from across a room and stores on the unit when not in use.

    4 cool settings

    Keep cold air moving at the speed of your choice for custom comfort. Four fan speeds let you circulate air without cooling for versatile use.

    Washable, slide-out filter

    Helps promote fresh, clean air and enables repetitive use.

    Overload protection

    Helps keep your home safe.

    Auto evaporation system

    Allows use without a water bucket for hassle-free operation.

    54dBA quiet operation

    Helps eliminate noisy operational sounds.

    Digital LED display

    Provides information at a glance.

    Automatic on/off timer

    Enables preset operation up to 24 hours in advance for reduced energy consumption.

    Portable design

    For flexible placement options.

    Customer rating

    Rating 3.4 out of 5 stars with 21 reviews

    would recommend to a friend



    • It's to time consuming to move room to room because it needs venting to the outside, Noisy have to have the TV or music volume up much higher and disturbs others in the house.LibPar
      See all reviews that mention noise level as a con
    • Rating: 4 out of 5 stars

      Box of Brrrr

      • My Best Buy® MemberMember

      I just bought it but like this unit; it's easy to set the target temperature, blows cold air, reduces humidity quickly, and typically doesn't require emptying water out. It serves as a fan, humidifier, or A/C unit. It has a five year part and one year labor warranty so they expect it to last for awhile. I bought an inexpensive window A/C 2 years ago to keep my bedroom colder than the whole house at night. It lasted a year and a half. Kind of hurt my back getting it in and out, this portable unit seems like a better option for four months/year of use (it will roll into the closet for storage). I won't awake to the rain pounding on the the window unit during storms. Here are a few cautions though- 1) it needs to sit 20" from a wall for air flow, 2) it's hot air vent duct to the window will only bend so much, so your going to have keep it within a couple feet of a window, 3) remote only operation- don't lose the remote, 4) the manual cautions that it will turn off if water pan fills (typically only in extreme humidity conditions), if this happens you need to set a cake pan under it and open a drain line 5) the vent duct snaps into a plastic window slider that fits under your window sash. I have 42" wide windows, the slider's max. length is about 36", I had to make a vent holder using a 42"x1"x6" board. The original vent holder slider uses two cheapo snaps but there are no holes on one side of the slider so you can't use the second snap as instructed in the manual. This isn't a big deal but I was hoping for a little higher quality of slider for this price (although I consider the unit and vent duct fairly high quality). Considering the cautions, don't let me talk you out of this unit. It works great and I would buy it again.

      I would recommend this to a friend

    • Rating: 1 out of 5 stars

      Disappointed, returned the unit

      • Verified PurchaserVerified Purchase
      • My Best Buy® Elite MemberElite Member

      I messed up my back this spring, so my wife insisted that we get portable a/cs instead of window units. Did a fair amount of homework and accepted the fact that portables just aren't as efficient as window units, but had little choice. Several review sites listed Honeywells as decent units and the 5 year parts and labor warranty, as well as the fact that this unit draws about an amp less current as a comparable Frigidaire, made me order it (not available in Best Buy stores). Just to cover our bases, we also ordered a Frigidaire portable unit. We put the Frigidaire in my wife's office and the Honeywell in our bedroom. There was no comparison. The Frigidaire, on low, had my wife talking about how cold it was in her office. The Honeywell, on the other hand, in the heat of a 90 degree afternoon, on high, could do no better than about 77-78 degrees, shades drawn, room dark. The unit is rated for a 250 square foot room, our bedroom is about 150 square feet and unless you were standing within about 2 feet of the unit, you couldn't feel any cold air. We returned the Honeywell (an easy return, thankfully) and replaced it with another Frigidaire and we are satisfied.

      No, I would not recommend this to a friend

    • Rating: 5 out of 5 stars

      Does a great job

      • Verified PurchaserVerified Purchase

      Big unit for my small room but very happy with it. It is somewhat loud but it actually lulls me to sleep, no rattles or bangs while running. It cools my room quickly and removes the humidity. Great not having to empty a bucket or run a hose outside. The window "attachment" is super easy to place but I did add some foam insulation pieces for an airtight fit in my window. Can remove it easily if I want window open which is impossible with a window unit.

      I would recommend this to a friend

    • Rating: 1 out of 5 stars

      portable ac unit

      • Verified PurchaserVerified Purchase

      ordered online first part of June 2016. By middle of July 2016 when the temp was over 90 degrees unit would not keep 100sq foot room under 80 degrees. Because not an Elite or special customer of Best Buy only had 15 days to take back, not the 30 or 45 or even 60 for a wedding present. Stuck with a $355 unit that can only be used on days under 90 degrees. Very un happy with Best Buy. Will think long an hard if I ever shop with them again. Being only a regular customer.

      No, I would not recommend this to a friend

    • Rating: 2 out of 5 stars

      Not really impressed - doesn't cool down my room


      This ac will keep you cool if its pointed directly at you. However, honestly it just cant keep my room cool. When the sun goes down it does a decent job at keeping it comfortable but during day, especially when the sun is outside of my window with my blinds closed this thing just can't keep up. I wouldn't recommend it.

      No, I would not recommend this to a friend

      • Brand response


        Hi Duke, We're sorry to hear about your experience. The cooling efficiencies of these units are affected by environmental factors, and there are ways that we can increase the efficiency of Portable ACs. Please give us a call at 1-800-474-2147 between 8:30 AM and 5:30 PM Monday through Friday or send us an email at so we can help provide a solution for your room conditions. Thank you. JMATEK

    • Rating: 5 out of 5 stars

      Works amazingly well!

      • Verified PurchaserVerified Purchase
      • My Best Buy® MemberMember

      I bought this AC mainly due to the size. It fits perfectly in my office under my desk, and keeps the room perfect. I did have to find a special vent due to my office not having windows, but this kit came with everything needed if you have a window available. I absolutely love this AC unit!

      I would recommend this to a friend

    • Rating: 5 out of 5 stars

      Nice unit

      • Verified PurchaserVerified Purchase
      • My Best Buy® MemberMember

      Our A/C unit for our second floor went out and we needed a quick fix until the needed repair part arrived. The unit was a white one and not a black unit as described here. It did a nice job of cooling our bedroom. It wasn't exactly quiet, but it did a nice job of cooling our bedroom.

      I would recommend this to a friend

      • Brand response


        Hi Harry, Thanks so much for your review! We're happy to hear this unit kept your bedroom cool and comfortable. JMATEK

    • Rating: 3 out of 5 stars

      It actually cools, although slowly.

      • Verified PurchaserVerified Purchase
      • My Best Buy® MemberMember

      I have never thought these would be very effective, but to my surprise, it does work, although slowly in very hot temperatures (which were the only times we used it). It is easy to set up and it is quieter than I expected. We did not have to drain the water.

      I would recommend this to a friend

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