- How does flash-evaporative cooling work?
- Will flash-evaporative cooling work in my location / climate?
- Will flash-evaporative cooling work in high humidity areas?
- What is the CFM of the products?
- How large an area will this cool / what is the coverage in square feet?
- Will this add moisture/humidity to the air?
- How much will it reduce the temperature?
- Where can you use the CULER evaporative coolers?
- What type of water can you fill the cooler with?
- What is the run time with COOL on, and how much water does it hold?
- Should there be a certain amount of space around the cooler?
- Can it be left outdoors?
- Does ice water make it colder?
- What happens if the cooler runs out of water?
- Where is the best place to use the unit?
- User tips for optimized personal cooling
How does flash-evaporative cooling work?
Evaporative air coolers leverage the amazing ability of water to extract heat from the air when it evaporates, thereby reducing the temperature of the air projected from the units. It’s the same natural process that delivers the cool air you feel when standing near a lake or ocean.
The secret to creating more cool air from an evaporative cooler is increasing the surface area of the water to achieve a faster rate of evaporation. Unlike swamp coolers which simply drip water down a pad to try to increase surface area, our patented CULER Flow Blurring® technology atomizes water into uniformly minute particles to create many times more water surface area than pad-type evaporative air coolers. Particles of this size simply flash evaporate creating a cool, refreshing stream of air.
The result of immediate, flash-evaporation is that our air coolers are able to produce maximum cooling benefit and exceptional velocity with less energy, which dramatically enhances efficiency and makes them extremely effective for both indoor and outdoor applications.Back to Index
Will flash-evaporative cooling work in my location / climate?
Portable evaporative coolers can work in any climate, although, the cooling performance is maximized in drier areas. CULER products have been third-party tested at 90 degrees with both 25% and 70% humidity. The temperature reduction at the coolest point of the airflow was 22 and 11 degrees respectively. We believe – and think you would agree – that a cool breeze that is 11 degrees cooler than the surrounding temperature is both “working” and a welcomed personal cooling solution in a higher humidity area.
The problem with the maps or information you may have seen that confine effective evaporative cooling to specific sections of the US is that they oversimplify climates. Typically an entire section of the US is deemed dry with the rest humid and thus, according to said maps you can only use evaporative cooling in a few states. This is not the case and not even accurate information. In Florida, for example, the humidity is 88% in the early morning – too high for optimal evaporative cooling results, but the humidity can drop to 55% during the hottest part of the day – when you would need additional cooling. At 55% humidity, a portable evaporative air cooler is definitely a viable solution for personal cooling. So even in areas that are traditional humid, evaporative coolers can be an option as humidity levels vary within the “dry” or “humid” regions and even change throughout the day.Back to Index
Will flash-evaporative cooling work in high humidity areas?
Yes, but to a lesser degree in high humidity conditions, as the evaporation rate is reduced and thus the cooling effect. With higher humidity levels, the air already has large amounts of vapor so a portable evaporative cooler cannot evaporate a great amount of additional water, reducing the amount of possible cooling. CULER products, however, have been third-party tested at 90 degrees with 70% humidity. The temperature reduction at the coolest point of the airflow was 11 degrees (or 79 degree airflow temperature vs. 90 degree surrounding temperature).
In areas where high humidity occurs at certain times throughout the day, you can simply use the CULER as a fan. When the humidity drops back down, activate the flash-evaporation to reduce the temperature of the airflow and cool your personal area. In Florida, for example, the humidity is 88% in the early morning – too high for optimal evaporative cooling results, but in the afternoon the humidity can drop to 55% during the hottest part of the day – when you would need additional cooling. At 55% humidity, a portable evaporative air cooler is definitely a viable solution for personal cooling.Back to Index
What is the CFM of the products?
We typically do not promote our CFM information because it is more a measure of ventilation and not really indicative of how well a portable evaporative cooler will actually cool the airflow. That being said, the CFM for the SOLO is 285 and the DUET is 570 but again this is by no means a measure of the units’ ability to cool. A couple of examples about CFM to illustrate this point:
- Many pedestal, box and barrel fans have more CFM than a portable evaporative cooler. Unlike evaporative coolers, however, fans do not reduce the temperature of the air. Fans just blow the hot air around. So fans can have greater CFM, but no capacity to actually cool the air.
- A pedestal, box or barrel fan may even have more CFM than an air conditioner, but again a fan will not reduce the temperature at all, and obviously nowhere near the extent of an AC.
In regards to portable evaporative cooling, evaporation is what causes the reduction of the air stream’s temperature, not CFM. Therefore, CFM is simply not a very helpful metric. Our goal is to provide you with unparalleled portable, personal cooling you can use anywhere to feel cool, comfortable and refreshed – not to move around a lot of air.Back to Index
How large an area will this cool / what is the coverage in square feet?
CULER flash-evaporative air coolers (like all portable evaporative coolers) are designed for portable, personal cooling. No portable evaporative cooler is intended to cool entire areas, rooms or homes. Although many are marketed this way, portable evaporative coolers do not work like air conditioners to ventilate hot air and continuously cool recycled air to steadily cool an entire enclosed room or space. Accordingly, we do not provide specifications for a coverage area, as we do not wish to perpetuate misinformation or mismanage expectations.
CULER offers portable, personal cooling right where you are – wherever you are. Our products create a cool refreshing breeze to guide towards you or a small group indoors or outdoors. For optimal personal cooling, simply place the unit around three feet from you, face the port or ports in the direction you want to cool and do not block the refreshing breeze from reaching you or your group.Back to Index
Will this add moisture/humidity to the air?
Simply put, yes. All portable evaporative coolers add moisture to the air. Portable evaporative air coolers evaporate water in the air to reduce the temperature of the dispersed airflow, which adds to the overall level of humidity. The increase in humidity, however, is not substantial and can even be controlled to a certain extent.
First, CULER products only evaporate around 2 gallons of water per 24 hours of continuous use. This is equivalent to boiling a pot of water on your stove – which clearly does not greatly alter the humidity in your home.
Second, to avoid adding unwanted humidity to a room, it is recommended that you do not use the product in an enclosed space (with no ventilation or circulation). If you place any type of portable evaporative air cooler in an enclosed space, you will add humidity to the room and reduce the cooling performance. If you use indoors to supplement the AC (AC is still running) just use your portable flash-evaporative cooler in an open space to allow for circulation – the AC will help to circulate the air and remove humidity. If you are using indoors without an AC (or the AC is off), it is recommended that you open windows or doors to allow for circulation and ventilation. Following these steps will maximize cooling and limit increased humidity.
For optimal placement, see Optimal Operating Placement Image on page 9 of the manual.Back to Index
How much will it reduce the temperature?
The reduction in temperature will vary due to several factors, predominately the temperature and humidity of the air in your location/application.
Independent third party testing confirmed CULER products achieve a reduction in the temperature of the projected airflow between 11 and 22 degrees at the coolest point, depending on the humidity level.
For example, at a temperature of 90F and 25% humidity the temperature of the airflow will be between 68F and 88F depending on the distance from the unit (2 – 22 degree reduction). The temperature of a pad-based cooler in the same climate will only be between 86F to 89F depending on the airflow’s distance from the unit (1 to 4 degree reduction).Back to Index
Where can you use the CULER evaporative coolers?
The CULER evaporative coolers were designed to be used both outdoors and indoors.Back to Index
What type of water can you fill the cooler with?
You can use any drinkable water (tap, hose, bottled, or distilled).Back to Index
What is the run time with COOL on, and how much water does it hold?
SOLO – 10 + hours
DUET – 6 + hours
Both the SOLO and DUET will hold up to 1 gallon of water.Back to Index
Should there be a certain amount of space around the cooler?
Yes, there should be at least three feet of space in front of the port. (See Recommended Clearance image on page 9 of manual)Back to Index
Can it be left outdoors?
It is not recommended to leave your cooler outside when it is not being used. (Think of it like a portable stereo—you can use it outdoors, but not recommended to leave outdoors.)Back to Index
Does ice water make it colder?
Water temperature does not noticeably impact the cooling performance.Back to Index
What happens if the cooler runs out of water?
If the cooler runs out of water, it will simply stop atomizing water. No harm will be done by operating the cooler without water.Back to Index
Where is the best place to use the unit?
See the Optimal Operating Placement Image on page 9 of manualBack to Index
User tips for optimized personal cooling
- CULER offers directional cooling power for portable, personal cooling wherever you need it, unlike fixed AC that cools entire rooms and homes
- Place the unit around three feet from you and do not block the cool breeze, as the maximum cooling effect is felt directly in the stream of airflow
- Do not use in an enclosed space, as this will increase humidity / moisture
- The temperature change of the airflow will vary depending on the temperature, humidity and other variables in your location
- Do not overfill the water tank, as this may cause water to stream from the nozzle
Power button is not illuminating
- Power button is in the OFF position
- Correction: Press POWER button one time
- Power cord is not connected
- Correction: Connect power cord and press POWER button one time
- Wall outlet is not providing power
- Correction: Find an alternate power outlet
No air coming from port
- FAN button is in the OFF position
- Correction: Press FAN button to activate (high, med, low)
No atomization coming from port
- COOL button is in OFF position
- Correction: Press COOL button one time
- Water tank is empty
- Correction: Fill tank with water
- Tank cap is not fully tightened
- Correction: Tighten tank cap
- Water filter is clogged
- Correction: Replace water filter
Water streaming from nozzle(s) during shutdown
- Water tank is overfilledCorrection:
- Correction: Open tank cap to release pressure. Drain tank to bottom of fill basket. During next start up the cooling function may stream water for a few seconds until the lines have been cleared.
Water streaming from nozzles(s) during operation
- Air filter is clogged
- Correction: Replace air filter