Hessaire MC37M 3100CFM Evaporative Cooler

As long as the humidity is low this unit is very effective. In a humid climate this won't work. In northern Arizona summers are very dry unless there is the occasional rain shower. Daytime temperatures can easily be over 100 degrees especially in July. The garage is not insulated so the air conditioner is incapable of cooling the 425 sq ft even though it is rated for 750 sq ft. The cooler I have is rated for 950 sq ft. so is more than adequate. To use it I partially open the garage door (about 3 ft off the floor) and place the cooler directly in front of the opening. I found that just opening a window or walk through door is not adequate ventilation and damp and not very cool situation. A full reservoir will last about 1 1/2 hours. I have a garden hose just outside, so filling is quick and easy (1-2 minutes). It has an auto fill feature, but that is not recommended for indoor use. I use the A/C when it is raining as there is an outside temperature drop and the humidity is up. As a bonus this is much more energy efficient than A/C

This is a great portable cooler. I debated whether to get a whole home cooler or just a portable cooler. I’m glad I went this route as many reviews had varying ratings. Here’s my situation which may help others decide.I have a 2 story home. The upstairs is approximately 900 sq ft and is basically an open floor plan loft which has a bedroom, bathroom, and livingroom area.The downstairs is about 2200 sq ft that has the livingroom and kitchen centrally located with other rooms located around this central location. I explain this because I get great circulation in my home due to the layout.I live in SW Colorado and our typical humidity in the summer season is under 20% and most of my home never gets direct sun for too long in one location. Due to this, my home rarely gets warm until about 3-4pm in the west side. And it’s only gets a bit warm for me until about 8-9pm when the heat breaks due to the sun setting.So with that info, I bought the unit for approximately 900 sq ft. I placed my unit in the western most room and have it facing at an angle towards my centrally located rooms which is the livingroom and kitchen. On Low Setting, this thing easily knocks the heat out on the main floor. I’ve not had to use the Medium or High Settings what-so-ever even in mid to high 90s. I run a window fan upstairs to just pull heat out of the upstairs, run my ceiling fans (2) per normal, and typically I don’t have to open up any windows downstairs. While it’s recommended to run in front of an open door or window, I never do. When it begins to cool off in the evening, I may or may not open up a window while this thing is running. Due to how dry it is out here, typically I do not get any mugginess in the home from running as I do. Your situation may differ depending on humidity.Installation of the wheels was a breeze. The only thing I’d suggest is DO NOT use power tools such as a drill driver and DO NOT over tighten the screws for the wheels. I just hand tightened to snug and had zero issues with stripping out the plastic. You just have to take care. My wheels were loose within the box as the plastic storage cover was not securely screwed down. It was a non-issue for me and I didn’t have to build any wood base.The only real issue I had was the whole thing is molded plastic and my water storage section has a small area that is a tad warped. It was also a non-issue for me.As for loudness... I can hear my tv just fine with it on Low and I’m sure would hear everything just fine on the other settings. When I set a box fan next to it, I can hear the box fan on low over the cooler to give ya an idea. The only part that I find a bit annoying is the oscillating setting. It sounds like plastic rubbing on plastic with just little creaks. I’m sure a little Teflon spray, chain wax spray, or even a little WD-40 could curb that, but I don’t bother with the setting.All in all this is a great cooler and I waited to pick it up when it had a price reduction. It cools pretty much my entire downstairs, with the central house receiving the most benefit and the hallway and rooms that the breeze is directed towards in my home. I’d say it easily knocks the home temp into the mid to low 70s for about 1500 of the almost 2200 square feet I have in the main level and that’s on low. The remaining 700 sq ft is cooler, but not as noticeable. It could be if I ran it on the other settings, but no one is in those rooms or upstairs until after 9pm and my house is opened up at that point since I get temp drops of 25-30+ degrees when that sun sets.If you have my situation, this thing will easily cool your main level of your home beyond it’s minimums depending on your situation.I’ll end this review with this thought, just take into consideration your home layout, your typical humidity, the rooms that actually need cooling during the times it’s uncomfortable for you. Each situation is different. My cooler usually only gets run on 85+ degree days for about 4-6 hours, due to my locale. Once the outside temp drops into the 70s, my home gets opened up. Your situation may vary.

I live in Tucson, Arizona where many houses used to only have these units on the roof for cooling. We call them Swamp Coolers. They will only work in a low humidity environment or you might as well just buy a big fan. Water runs over the filters, the big fan sucks in warm air and evaporates the water, the temp is lowered up to 25 degrees, and you have nature’s air conditioning, just like you on a hot, sweaty, breezy, desert afternoon!I bought this in July. We were replacing a 16 yo Mobile Mastercool that was made of metal and the doors were rusted out at the bottom.I saw they had these at the local Big Box Hardware Store and I was skeptical because none were on display. I was able to get a better deal here so I gave it a shot.We use the cooler on our patio under our awning. As long as it isn’t monsoon season, it drops the temp a good 25 degrees. The 3-Fan speeds are great and the oscillating feature works great. I’ve told my wife several times to turn it down because I was freezing out on a 90 degree night.The fan is very powerful which helps with the evaporation off the side and back pads.My only complaints are the plastic back panel is a little flimsy and kind of a pain to seat. If you can get the float right, hopefully you are replacing the cardboard panels only once every couple years.Replace the cardboard panels you say. Depending on how hard the water is in your area the panels over time will build up scale on them and will no longer have a good flow for the water and will need to be replaced. I’ll admit I have gone five or more years at a time but it really does work best for airflow if you replace them every couple years. A lot of this does depend on the hardness of the water in your area.My second dislike about this unit is the float. It is a plastic apparatus set up that is positioned in the corner by the side panel. First of all make sure you cut away a little extra of the cardboard so the float can move freely. I have had a very hard time getting the float to stop where I want it to be so I can just leave the hose on. When it is really hot and evaporated quickly if I have the hose bib on a very low flow it often times just fills enough and doesn’t overflow. But once you turn the fan off when you come out in the next morning there will be all kinds of water on the ground around the unit. I’m sure I can fix this I just haven’t wanted to waste an hour and a half trying to get the level perfect. If it starts to overflow I just turn it off for a while. You can tell when it is running low by looking at the float on the front of the unit. I’m sure the manufacture will reply that you should never leave the hose bib on it unattended anyways.Overall I am extremely happy with this unit. I did buy an extended warranty to make sure that the unit would be covered at least for three years. I will give an updated review next year since now it is our fall/winter and we aren’t using the unit again until most likely April.

Great, did what I wanted. The water fill thing is difficult to get fully tight and leaks easily. But I will figure out a system. I would definitely buy again, the whole workshop space is much cooler.

Works great!! I wish I would have gotten one sooner. I’m a dirtbike mechanic and makes my shop way cooler!! Blows plenty of air!You won’t regret getting one