Honeywell MO08CESWB Review

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Updated May 16, 2023
90 Expert Rating

One of the things that’s going to greatly determine what kind of central air conditioner you’re going buy is probably how big your living space is. This is because the room size in sq ft also informs the amount of cooling power that’s required to adequately distribute cool air across your space.

The MO08CESWB portable air conditioner, for example, would only be suitable for a room that’s about 250 to 350 square feet in size, and this is because it’s only got a BTU rating of 8000 BTU ASHRAE (4000 BTU DOE). If you are unfamiliar with these rating terms, check out our comparison of BTU DOE Vs BTU ASHRAE to learn more about them. Whereas, the Honeywell MO10CESWK will work for a 450-square-foot room.

Care to find out if this makes it the best portable air conditioner for RV? Make sure you get to the end of this review to find out, and also compare it to some of the most popular air conditioners on the market today.

Why We Like It – Honeywell MO08CESWB

The Honeywell MO08CESWB portable AC is a simple-looking, elegantly designed portable AC conditioner that guarantees quiet operation, and is very easy to use. The AC unit has a dehumidification capacity of about 44 pints per day, and also features a washable dual filtration system to keep out any dust or unwanted particles. A similar AC that uses washable filters is the Honeywell MN10ESSWW model.

  • Light and compact
  • Dual filtration system
  • Check filter indicator
  • Only 2 fan speeds


The MO08CESWB Honeywell portable air conditioner is pretty much a good pick to opt for if you’re looking to spend less than $400, and this is because it’s got 3 different functions built into it. Aside from just cooling down your space, the portable air conditioner is also capable of reducing the amount of moisture in the air, as well as fanning your space down whenever you need that extra gust of air. It’s a much larger alternative compared to the Ontel Arctic Air Ultra, so you won’t be able to move around as easily as you would with the Ontel air cooler. If you’d like a more portable option, we think the Honeywell MO08CESWK compact portable air conditioner is a perfect choice.

Energy Efficiency

To help you keep your energy costs down, you can use the 24 Hour timer that the MO08CESWB Honeywell portable air conditioner has in store, and in doing so, you’ll be able to regulate the hours in the day that you’ll have the AC unit on. The MO08CESWB Honeywell AC also has a sleep mode just like the Costway Portable Air Conditioner does, so you’ll be able to program how it should function at night. This also allows you to shave off some coins off your bills because, at night, the AC functions at a much lower operating capacity. But, if it’s beginning to operate poorly, you’ll want to learn about changing out an AC fan motor.


Unlike the LG LP0817WSR 115v portable air conditioner, the Honeywell MO08CESWB compact portable air conditioner belts out a filter clean alert whenever it’s time to have its filter washed. Taking it out and washing it is very easy to do, as all it entails is placing it under a faucet that has running water. The washable dust filter helps reduce dust, and keep the air that’s circulating within your space as clean as can be.


Like most portable air conditioners, the Honeywell MO08CESWB is backed by a 1-year warranty, so you shouldn’t have any fears over not being able to get support if your unit happens to be problematic. The AC unit is of generally good build quality, and it comes with a flexible exhaust hose, a window bracket, and of course a remote control. A 1-year warranty tends to be the standard for many AC units, even for window units like the one in our LG LW1517IVSM review.


The Honeywell MO08CESWB AC unit is only available in a white-blue trim, but even so, it’ll probably match easily with most of your interior decor. The unit also guarantees quiet operation, as it’s got the capacity to produce between 50 & 53 decibels of sound at its loudest. The AC relies on a self-evaporation system, which means it doesn’t require a bucket for water collection.

Honeywell MO08CESWB Wrap Up

The one con that doesn’t make us too happy about the Honeywell MO08CESWB is that it’s got only two fan speeds instead of the typical three; there’s only a high level and a low level. Aside from this, everything else is pretty much satisfactory, so if you’re impressed, go ahead and make your order now! And if you still want to shop around for another 8000 BTU unit, there’s always the best 8000 BTU window air conditioner.