Whynter - 400 Sq. Ft. Portable Air Conditioner and Heater - Frost White

The dual-hose design of this Whynter ARC-12SDH 12,000 BTU portable air conditioner and 11,000 BTU heater enables high-speed cooling, so you can quickly achieve a comfortable temperature. Digital controls and a remote simplify operation.

Air Conditioner Buying Guide
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Key Specs

  • Recommended Room Size
    400 square feet
  • Air Conditioner Type
  • Auto Shut-Off
  • Sleep Mode
  • Window Venting Kit
  • Hose Configuration
  • No
  • Timer
  • Airflow Rate
    188 cubic feet per minute
  • Wi-Fi Enabled
  • App-Controlled
  • Remote Control
  • Energy Efficiency Ratio
  • Number Of Fan Speeds
  • Integrated Heater
  • Number of Cool Settings
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What's Included

  • Whynter 12,000 BTU Portable Air Conditioner and 11,000 BTU Heater
  • Remote with 2 AAA batteries
  • Washable prefilter, activated-carbon air filter
  • Extendable exhaust hose, plastic window kit, setup accessories
  • Owner's manual

Ratings & Reviews

Overall Customer Rating:
59% of customers would recommend this product to a friend (7 out of 12)


Up to 400 sq. ft. cooling/heating capacity

Keeps your living area comfortable.

96-pts./day dehumidification

Reduces moisture to create refreshing, breathable air.

Auto drain technology

Recycles and utilizes collected moisture to produce cool air. Dual-hose operation ensures rapid cooling.

Digital controls

Allow you to easily select air conditioner, fan or dehumidifier mode and 1 of 3 fan speeds.

Cooling thermostatic control from 61° to 89°

Enables precise temperature adjustments.

Activated-carbon filter

Along with a washable prefilter helps maintain a healthy environment.

Auto safety shutoff

Plus overload protection and tip-over shutoff promotes safe use.


Enable easy transport throughout your home or office.

<56dBA noise level
Lets you use the air conditioner without disturbing others.

24-hour programmable timer

Offers simple preset operation. Auto restart ensures that the air conditioner renews operation after a power failure has ended.

Plastic window kit

For versatile installation. Exhaust hose extends up to 49" for flexible placement.

Overall customer rating

Rating: 3.9 out of 5 stars with 12 reviews

59%of customers would recommend this to a friend



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Most helpful reviews

See all customer reviews
  • Rating: 5 out of 5 stars

    Excellent product for the money

    • Verified Purchaser
    • My Best Buy® Member

    This product is great. The air conditioner cools very fast. Have not used the heater yet. Have not used the dehumidifier either; but I want to hook it up so I will have a continuous drain;and not have to worry about it. The customer service is fabulous. I have contacted them severl times and if they do not know the answer they make sure they research and have always answered my question. This means a lot in today's market. Have been telling a lot of people about this great company.

    I would recommend this to a friend

  • Rating: 5 out of 5 stars

    Good air conditioner, mostly as expected

    • Verified Purchaser

    The installation was easy. I have windows that slide sideways, so the two hoses for in and out are one above the other. The first time I turned it on, about four hours later the water tank was full. That surprised me because I thought that the tank would slowly empty itself. So I got 1/4" vinyl tubing, and fed the water to the outside. Quite easy. The unit is about as loud as expected, and you get used to it. We play piano in the same room, it works fine.

    I would recommend this to a friend

  • Rating: 5 out of 5 stars

    Easy setup but a bit bulky

    • Verified Purchaser

    Unit was larger than I anticipated but that is to be expected for 11,000 BTU's. Rolls easy but not across carpet so be careful. Window adapters are pretty easy to set up but pay attention to which side is the exhaust. If you have to set it up in a narrow window where the ports are vertical. Be sure to put the exhaust on top or the hot air will get pulled back in the intake, since heat rises. Other than that, it is pretty quiet and the settings are easy to follow with the remote. Forgot, it is top heavy so be careful with small children around it because it can tip on top of them if they pull on it.

    I would recommend this to a friend

  • Rating: 5 out of 5 stars

    Keeps a glass balcony nice and cool

    • Verified Purchaser
    • My Best Buy® Elite Plus Member

    I bought this for my apartment that has a large glass balcony that gets very hot during the day. While this unit is overpowered for the size of the area, it has performed quite well.

    I would recommend this to a friend

  • Rating: 1 out of 5 stars

    Worked fine for 20 days

    • Verified Purchaser
    • My Best Buy® Member

    I ordered this from bestbuy website and got a delivery and was happy the way it worked for the first few days, however on 18th day the unit stopped blowing cold air. Strangely, all the rest of function like dehumidifier, fan and heater worked fine. There is only one button to switch between ac, fan, dehumidifier and heater. The light went off when i tried turning it on ac and the unit essentially turned into an expensive fan.. I phoned bestbuy and I was told the product is out of 15 day and because I am "A Non-Elite" member, I cannot exchange or return (so if i was to spend more money at bestbuy, my rights would be different as a customer). Now in middle of this unbearable, hot summer, i have to send the ac off to get it repaired by the manufacturer. Just not good enough for a product worth $450!

    No, I would not recommend this to a friend

  • Rating: 2 out of 5 stars

    Looks like a Dalek

    • Verified Purchaser
    • My Best Buy® Member

    It's a very large white plastic appliance that resembles a dalek from Dr. Who with its two white ducts like arms and slightly tapered upper portion. Putting together should be easy but its not obvious -- the instructions are a bit murky, although there has a been a page added to explain further. Once assembled it cools one room but already there seems to be issues -- the green light to indicate that its supposed to be cooling appears broken but its hard to tell with the odd way the control panel buttons cycle the product on and off.

    No, I would not recommend this to a friend

  • Rating: 5 out of 5 stars

    Great product great priceGreat product great price

    • Verified Purchaser
    • My Best Buy® Elite Member

    Great product great price! Easy to order and received on time!

    I would recommend this to a friend

  • Rating: 4 out of 5 stars

    Overall Great Unit


    I am a college student in central Iowa living in a house that is roughly 100 years old. This being said, the insulation is below par and we also do not have central air conditioning. To top it all off, the bedrooms are on the second floor and the month of August can put a damper on our studies due to the overwhelming heat. In search of an air conditioner/heater that could keep up with the lack of insulation, as well as be portable enough for my mobile life; I found comfort in the Whynter 12,000 BTU air conditioner/11,000 BTU heater. I needed a product that could keep my 400 sq. ft. room cold in the early fall, as well as warm in the winter months. Before having this air conditioner my bedroom temperature resided at a balmy 82 degrees. Once I purchased this product I was able to actually enjoy the functions of my room. The design of the unit is practical and relatively easy on the eyes. It can blend fairly well in any type of room setting and also has the benefit of being moderately quiet. Also, the unit has rollers beneath, which allows easy transportation around a room as needed. Installation was a cinch; the package comes with everything required to accommodate relatively any room situation. The venting hoses were plenty long enough and the window venting kit was easy to install into my window. Overall installation time was roughly 15 minutes. Pros: 1.) Cools my 400 sq. ft. room rapidly and with ease (takes roughly 30 min to cool.) 2.) Relatively light considering the alternative (window air conditioner.) 3.) Versatility (Air conditioner, fan, heater, and dehumidifier.) 4.) Remote control is accommodating when doing homework across the room. 5.) Relatively quiet (able to run the machine at night and sleep well.) 6.) Able to turn the unit on/off multiple times a day to cool my room quickly. Cons: 1.) The units drainage system is a bad design (water accumulates quickly.) 2.) The digital info screen is bright at night (unit is close to my bed.) In conclusion, the Whynter dual hose portable air conditioner is easily the best product for your money. After researching and now being able to use the unit, I have found out that I made a knowledgeable choice. I have only had the unit for about two months but have no issues to complain about. The most convenient aspect of this unit is the fact that I can cool my 400 sq. ft. room down rapid in order to be productive quickly.

    No, I would not recommend this to a friend

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