Hessaire MC37M Portable Evaporative Cooler

MC37 is the most popular model for people wanting to enjoy their patios. It weighs only 40 lbs empty. It measures 24” wide by 37” tall. It is ideal for patios, events and is easy to transport. It features a sweep function for maximum area coverage. With its powerful air throw, the MC37 provides 3100 cfms while cooling a 950 sq. ft area. The M150 offers the high visibility green trim.

Energy Efficiency

Choosing to go for an evaporative cooler over any other kind of air conditioner means you most probably aren’t as comfortable with the high levels of energy consumption that a typical window unit or even a portable air conditioner. This is so because it does not rely so much on electricity to produce cool air. Also worth mentioning is that the Hessaire MC37M evaporative cooler for example only has 3 fan speeds to choose from, so it shouldn’t be that much of a drain on your electricity.


There’s not much difficulty in getting the Hessaire MC37M portable evaporative cooler to work, as it only features 1 rotary dial and 3 switches as controls. It’s got a fan that’s got three levels, and oscillating levers that ensure even distribution.

Key Operational Points:

Pump must be primed per instructions prior to use. Your cooler must be positioned in front of an open window or door if it is to operate effectively. Always ensure that there is another open window or door through which the air can exhaust from the room. Ensure the filter is kept clean throughout the summer season. At the end of each day run your cooler on FAN ONLY for 30 minutes to dry out the filter Prior to putting your cooler away for winter, always: a. Drain the tank and wipe out clean. b. Clean the filter c. Reassemble and run on FAN ONLY for 30 minutes to dry out the filter.

Hessaire MC37 - Frequently Asked Questions

Q: Where are the wheels and castors that should come with this unit?

A: They are in a nested compartment with a cover you need to remove on the bottom of the unit.

Q: Why doesn’t it cool right away? I just plugged it in but it’s not cooling.

A: You need to fill the water compartment to full to allow the water pump to prime. Once that happens, it will begin to cycle the water and within 15 minutes will be cooling efficiently.

Q: How many hours can this unit continuously cool after I fill the water reservoir?

A: The MC37V can cool up to 4 hours on one tank full. I usually check my unit every hour to make sure I am good. If you just want to ‘set it and forget it’, you can hook up the unit to your garden hose and the float valve will keep the unit continuously filled.