Best Room Air Conditioners
Frigidaire's FFRA0511R1 5,000 BTU 115V Window-Mounted Mini-Compact Air Conditioner is perfect for cooling a room up to 150 square feet. 5,000 BTU mini-compact air conditioner for window-mounted installation uses standard 115V electrical outlet (Window mounting kit included).
Reviews
Find Best Price at Amazon"I can not sleep through and entire night with the unit set to High Cool and maximum setting of 7."
"Took only about 20 minutes to install, does a GREAT job of cooling my small bedroom."
"We live in Maine and central air isn't really a common thing up here, but I wanted our guest to have the option for AC while they stayed with us as we can have hot and humid days on occasion. Anyways, with that said, I am defiantly no pro on AC's, but I can say it did the job it was supposed to do and has exceeded my expectations and it kept my guest happy."
"This is about as bare bones an air conditioner you will find."
"per hour unit works very well in cooling my sister in laws home office. No single circuit wall socket required. Keep direct sunlight through the windows to a minimum on days with an outside temperature of 90 F. or higher. This unit is not made to cool an entire floor of a home, but does a great job in one room of a house."
"The a/c comes with instructions, a top bar secured with screws that keeps the a/c from falling out of the window, foam strips, screws, and accordion side pieces to fill in the spaces. For extra security, my husband put a narrow piece of wood into the window above the a/c to ensure no one could open the window further from the outside."
"If I put in on Low Cool and number 4 to 5 it keeps the room at a steedy 71 degrees all night!!"
"Not sure if that's intentional or not, but it cools my little 7x11 room on hot New York days well enough (we don't have air conditioning, so I needed something). Bottom line: inexpensive but effective air conditioner, good for cooling a smaller room."
This unit can cool up to a 500 square feet space (ambient temperature and humidity may influence optimum performance). Remote control, carbon air filter, washable pre-filter, and product manual packaged inside exhaust hose.
Reviews
Find Best Price at Amazon"I've had experience with two other (different brand) 'portable' units and the main complaint with those is they didn't cool the space and the water tray needed emptying all the time. I waited one full season before writing a review as I really wanted to see how well it works. The units I've had in the past came with a sticky on one side foam strip to bridge the inevitable gap which allows air through. What you need it a shallow rimmed dish (The Ikea KALAS plate is PERFECT) and a smoothie straw (Bed Bath & Beyond) which is just wider diameter straw cut to desired length. When emptying you will need the shallow dish, a straw and a container to toss the water into so you're not dashing to the kitchen 5-10 times. With shallow dish and straw in place the larger in front person tips the unit towards the rear. The rear person says when to stop and will empty the shallow dish into the other container with out having to get up then tell the 'tipper' when to resume. What I did was to saw off a portion of the PVC slider (it was just going in the bin) and attach it like a wing between both outside holes. The same (filter) sheet I initially bought is still providing the material needed. Don't overthink it; any filter you can cut to size that's recommended for air filtration can be used."
"The window mounts that these units come with have two major issues: (1) the intake and exhaust vents are too close together, meaning that the intake will tend to suck in some of the hot air that the exhaust is pushing out, making the AC's job that much more difficult. This is especially true if you opt not to use the intake hose, because you will be pulling a vacuum on your room (air being pushed out, but not replaced with external air, meaning your room has a low pressure zone) which in turn pulls hot air in from the outside and makes it quite difficult to cool a room. The exhaust hose on these units gets super warm when the AC unit is in operation. I purchased the Reflectix DW1202504 Spiral Duct Wrap ($21 on amazon) and it was enough to do two exhaust hoses (1 for each of my AC units)."
8,000 BTU cooling capacity / 7,000 BTU heat pump / 3,500 BTU supplemental heating capacity (Uses standard 115V electrical outlet).
Reviews
Find Best Price at Amazon"If you live in a very humid environment be careful with eco mode because the coils never get a chance to dry out and can cause your ac to get moldy and smell since the fan doesn't run full time and dry the coils on the compressor off cycles. The best solution I've found so far is to get a sheet of the foam paneling at your local box box store and install the window ac and cut the foam panel to size, then take some clear rtv and seal any gaps."
"The GE can also, but its external housing is extremely thin sheet metal, and it is not tilted for removal of water. You have to buy additional metal components for the GE unit to prevent water from coming inside the house. In energy saver mode, the fan comes on periodically to sample the internal air temperature before deciding to run or not."
"Works great."
"Really great ac for us down here in Texas."
"Cools a hot room fast but only goes of briefly once the temperature is reached."
"The heat does not work at all."
"Delivered July 26 2017 now it's December when I need it to heat and it blows cool air."
Best Evaporative Coolers
Not just a Fan – Air Cooler reduces temperature through water evaporation.
Reviews
Find Best Price at Amazon"It works best in the low humidity, but it's going to gradually increase the humidity in the room as it runs. It actually gets to the point where you need to shut it down from getting the room too cool, but not when it's running only on water. I've been using a 6 gallon plastic water bottle and a battery operated water pump. I don't believe this is from the actual unit, but from the water when it adds humidity to the air. However, it will add humidity to the air faster with the window closed, which can sometimes make the room more comfortable if it's typically dry."
"When you start to get a funny smell I drain, add distilled white vinegar and wash the media once per month. I put the media (filter) outside in the sun to "deodorize" to avoid odor. I had the ceiling fans running and place this in my living room allowing the air to be evenly distributed throughout my home. The pictures I included are the unit running solely on room temperature distilled water with no ice. I love how the level meter is "float" controlled by the water in the tank. This gives a more accurate reading since adding ice will add to the water level. It has water that runs over the ice to help melt it and it REALLY cools the air down very quickly."
"First off, I will point out that this unit is a Swamp Cooler (also known as an Evaporative Air Cooler), ** NOT ** an Air Conditioner. I couldn't help but notice after reading through many Swamp Cooler reviews written by other customers that many people (1) simply don't know the difference between the two, and (2) don't know that Swamp Coolers will work well ONLY in DRY climates (where the relative humidity is 40% or less a good part of the day). Therefore, before I jump into the review on this product, I feel it's necessary to address: (1) the difference between a Swamp Cooler and an AC and (2) whether a Swamp Cooler will work in the climate in your area. If you're well-acquainted with Swamp Coolers, you may wish to skip the following sections titled "The Difference Between A Swamp Cooler and an AC" and "Will A Swamp Cooler Work For You?" Indoor Portable Evaporative Air Cooler." -----------------------------------------------. The Difference Between A Swamp Cooler and an AC. -----------------------------------------------. (i) AC: An AC cools air by using a refrigerant (older ACs/refrigerators use a CFC-based refrigerant called r-12, AKA "freon" while modern day counterparts use an HFC-based refrigerant called R-134A). (ii) Swamp Cooler: In a swamp cooler, outside air (dry air) is passed through a pad soaked in water. As opposed to an AC system, which can be a closed system (i.e. the expelled cooled air can be channeled back into the AC to be cooled again), an evaporative cooler needs to take in air from the OUTSIDE and the indoor air needs to be expelled outside (the expelled air, which has been humidified through the evaporative process, has to be directed away from the Swamp Cooler air intake to prevent it from being reintroduced into the swamp cooler). Let's get concrete: To show you EXACTLY how much cooling you expect a swamp cooler to deliver when it's used in your area, I have uploaded an Evaporative Cooler Chart from an almanac to the Customer Image section on the Product Page. For example, let's say the air temperature is 102 F. Using the chart, we can see that for a dry area where the relative humidity is 25%, a swamp cooler can bring the air temperature down to 77 F. If, however, the swamp cooler is used in an area with a relatively high humidity of 75%, a swamp cooler would only bring the air temperature down to 95 F! Indoor Portable Evaporative Air Cooler. Indoor Portable Evaporative Air Cooler. -----------------------------------------------------------------------------. The Honeywell is my second evaporative cooler. I've had another swamp cooler before -- one made by NewAir -- NewAir AF-330 Evaporative HEPA Swamp Cooler. You cannot expect this unit to work indoors in a closed environment because as the humidity builds up (the evaporative process needed for cooling introduces humidity into the air), the swamp cooler becomes less and less efficient."
Best Portable Air Conditioners
This Whynter GREEN ARC-14S portable air conditioner features the ECO-FRIENDLY CFC free GREEN R-410A refrigerant and lead free RoHS compliant components. This unit can cool up to a 500 square feet space (ambient temperature and humidity may influence optimum performance). Remote control, carbon air filter, washable pre-filter, and product manual packaged inside exhaust hose.
Reviews
Find Best Price at Amazon"I've had experience with two other (different brand) 'portable' units and the main complaint with those is they didn't cool the space and the water tray needed emptying all the time. I waited one full season before writing a review as I really wanted to see how well it works. The units I've had in the past came with a sticky on one side foam strip to bridge the inevitable gap which allows air through. What you need it a shallow rimmed dish (The Ikea KALAS plate is PERFECT) and a smoothie straw (Bed Bath & Beyond) which is just wider diameter straw cut to desired length. When emptying you will need the shallow dish, a straw and a container to toss the water into so you're not dashing to the kitchen 5-10 times. With shallow dish and straw in place the larger in front person tips the unit towards the rear. The rear person says when to stop and will empty the shallow dish into the other container with out having to get up then tell the 'tipper' when to resume. What I did was to saw off a portion of the PVC slider (it was just going in the bin) and attach it like a wing between both outside holes. The same (filter) sheet I initially bought is still providing the material needed. Don't overthink it; any filter you can cut to size that's recommended for air filtration can be used."
"The window mounts that these units come with have two major issues: (1) the intake and exhaust vents are too close together, meaning that the intake will tend to suck in some of the hot air that the exhaust is pushing out, making the AC's job that much more difficult. This is especially true if you opt not to use the intake hose, because you will be pulling a vacuum on your room (air being pushed out, but not replaced with external air, meaning your room has a low pressure zone) which in turn pulls hot air in from the outside and makes it quite difficult to cool a room. The exhaust hose on these units gets super warm when the AC unit is in operation. I purchased the Reflectix DW1202504 Spiral Duct Wrap ($21 on amazon) and it was enough to do two exhaust hoses (1 for each of my AC units)."
Best Split-System Air Conditioners
Pioneer newest ways series wall mount mini split ductless Inverter air conditioning and heat pump system. Smart buyers choose pioneer brand Inverter split systems for their top quality, reliability and performance, available at extremely affordable prices. Ultra high efficiency Inverter+ Ductless mini split heat pump system.
Reviews
Find Best Price at Amazon"I installed the main line, 12/2 UF cable, (14/2 would have worked too for those who will bring the wire size up), running it to a junction box just outside the house where I further branched to an A/C disconnect box and then on to the outside unit itself. Next came mounting the bracket to the wall for the inside unit and drilling the 2.5" hole through the wall for the line set to exit the house. Once the hole was drilled I then set out to connect the control cable to the inside unit so it could be ran outside the house with the refrigerant line set. First off, the color codes on the control wire and the diagrams on both the inside unit and outside unit were all completely different! For a few long minutes it was a head scratcher and then it dawned on me that the terminals on both the inside and outside unit had stickers on the wire terminal blocks, with the inside unit having the numbers 1-3 and the symbol for ground and the outside unit with numbers 1-3, L and N for Line and Neutral. The next problem I had was the control wire had pre-crimped connectors on both ends that would not fit the terminal block on the inside unit so I had to cut the connectors off in order to attach them to the terminal block on the inside unit. After that, most of the "grunt" work was done and I had a friend who is a recently retired HVAC guy help with the rest of the install which included leak checking and pulling a vacuum on the line set prior to release of the refrigerant. I purchased one of the line hide kits and it worked well just wish it came with a 90 degree adapter, due to the way I have the set up I was only able to use half of the hide (for the vertical run) and will probably do like many others and get a section of plastic gutter for the horizontal run of the line set."
"I researched every mini-split system on the market and based on reviews this Pioneer system seemed to be the clear winner. Also, buy a trim kit for the outside hoses and have it BEFORE you install it because if not you won't know where to hang the brackets between the trim pieces. I'm still figuring this issue out but I wish I would have ordered the trim kit at the same time as the system because the installer could have attached the hose trim pieces during installation."
"Sure I would have just hung the coils out of the wall and called it day but to make it nice you really need to do some bending and cutting, at least in my situation. What you will need is a pipe cutter, flaring tool, torque wrench (if you want to go by the book) and crows fittings for your lineset size, crescent wrenches, nylog (though it does come with lineset sealant I wanted the good stuff), some sort of mounting pad, cement blocks (to raise it off the mounting pad),pipe bender for sharp bends (we did ours slowly all by hand because I bought the wrong size), vacuum pump (go 5cfm or higher for longer length), manifold gauges, micrometer (for the sticklers I am told), nitrogen to pressure test and the regulator for it (I was going to skip this part but my brother-in-law brought it with him so we did it), all the electrical equipment like volt meter, conduit, breakers, wires, etc. Last thing, you need to raise it off the pad, as it comes its too low and the outside drain section hits the ground (used in heat mode), hence the cement bricks."
Best Through-the-Wall Air Conditioners
Place AC Unit on floor and secure Top Rail to top of unit Install Accordion Panels; gently pull back from center of each Panel to widen slightly Place AC Unit and Panels into window opening and use Level to straighten position; when straight, close window opening behind Top Rail, then extend Panels out against window frame Install Support Brackets to secure AC Unit into window, using Level again to straighten position. BEST PERSONAL OR RV AIR CONDITIONER - 5000 BTU window AC unit for 110V/120V electric outlets measures 16 inches long x 12 inches high x 15.4 inches deep - ideal for window length between 23” - 36” with minimum window height 13”.
Reviews
Find Best Price at Amazon"My central Air does not cool my bedroom and this is perfect for my 12X15 foot room."
"Great smaller air conditioner for a wonderful price."
"This little cooler unit is the perfect size for our bedroom!"
"I purchased this hOme air conditioner unit right after lighting took out my central air at home."
"We have a three story home and the top level gets unbearably hot in the summer even though we have central air conditioning."
"The only thing I wish is that it had vertical up and down wind control in addition to the horizontal (left and right) wind control which the unit has."
"During the cold months I simply remove and place it back in its box for storage until it gets warm again."
"As soon as I bought the AC unit, the weather immediately turned cooler, so I only got to use it a couple of times."
Best Window Air Conditioners
Frigidaire's FFRA0511R1 5,000 BTU 115V Window-Mounted Mini-Compact Air Conditioner is perfect for cooling a room up to 150 square feet. 5,000 BTU mini-compact air conditioner for window-mounted installation uses standard 115V electrical outlet (Window mounting kit included).
Reviews
Find Best Price at Amazon"I can not sleep through and entire night with the unit set to High Cool and maximum setting of 7."
"Took only about 20 minutes to install, does a GREAT job of cooling my small bedroom."
"We live in Maine and central air isn't really a common thing up here, but I wanted our guest to have the option for AC while they stayed with us as we can have hot and humid days on occasion. Anyways, with that said, I am defiantly no pro on AC's, but I can say it did the job it was supposed to do and has exceeded my expectations and it kept my guest happy."
"This is about as bare bones an air conditioner you will find."
"per hour unit works very well in cooling my sister in laws home office. No single circuit wall socket required. Keep direct sunlight through the windows to a minimum on days with an outside temperature of 90 F. or higher. This unit is not made to cool an entire floor of a home, but does a great job in one room of a house."
"The a/c comes with instructions, a top bar secured with screws that keeps the a/c from falling out of the window, foam strips, screws, and accordion side pieces to fill in the spaces. For extra security, my husband put a narrow piece of wood into the window above the a/c to ensure no one could open the window further from the outside."
"If I put in on Low Cool and number 4 to 5 it keeps the room at a steedy 71 degrees all night!!"
"Not sure if that's intentional or not, but it cools my little 7x11 room on hot New York days well enough (we don't have air conditioning, so I needed something). Bottom line: inexpensive but effective air conditioner, good for cooling a smaller room."
Best Humidifiers
The humidifier’s 1.5-liter tank delivers a moisture output of 150 milliliters per hour making it the perfect solution to relieve the symptoms associated with dry air. ULTRASONIC COOL MIST TECHNOLOGY: Safely moisturizes the air for up to 16 hours of continuous operation so you can breathe easy and get more restful sleep | High and low speed settings make it easy to adjust mist direction and speed to fit your comfort level.
Reviews
Find Best Price at Amazon"This humidifier works great to provide moisture to our bedroom."
">Daily: empty tank and base (get all the old water out; do a rinse but don't ever submerge base in water)."
"Excellent!"
"I purchased THREE ultrasonic cool must humidifiers last week (one for each bedroom in our house) and after using them for several nights, I absolutely LOVE them!! Update--I have now been using these humidifiers for almost one month, every night. My eyes are not dry when I run these every night, but when I travelled to D.C. recently and stayed in a hotel (and didn't have my humidifier) I got a nose bleed in the middle of the night and woke up with bone-dry mouth and eyes."
"The only downfalls is the water tank did only last about a night and a half on high."
"It just seems to come back as quickly as you clean it."
"I bought this because I had trouble breathing at night."
"You can't clean the bottom of the tank and pink slimy mildew builds up."
Best Humidifiers
The humidifier’s 1.5-liter tank delivers a moisture output of 150 milliliters per hour making it the perfect solution to relieve the symptoms associated with dry air. ULTRASONIC COOL MIST TECHNOLOGY: Safely moisturizes the air for up to 16 hours of continuous operation so you can breathe easy and get more restful sleep | High and low speed settings make it easy to adjust mist direction and speed to fit your comfort level.
Reviews
Find Best Price at Amazon">Daily: empty tank and base (get all the old water out; do a rinse but don't ever submerge base in water)."
"This humidifier works great to provide moisture to our bedroom."
"Excellent!"
"I purchased THREE ultrasonic cool must humidifiers last week (one for each bedroom in our house) and after using them for several nights, I absolutely LOVE them!! Update--I have now been using these humidifiers for almost one month, every night. My eyes are not dry when I run these every night, but when I travelled to D.C. recently and stayed in a hotel (and didn't have my humidifier) I got a nose bleed in the middle of the night and woke up with bone-dry mouth and eyes."
"I would have given it 5 starts if it weren't for having to fill it so often even on a low humidity setting."
"Maybe we received a defective unit but it worked for almost a month before we noticed that it was leaking. Running it on low seems to be fine but on high, ugh, water is everywhere the next morning if you don't realize it soon enough."
"You can't clean the bottom of the tank and pink slimy mildew builds up."
"I would spend more and get a product that is more thought out."
Best Home Appliances
Why not get a URPOWER 5L Ultrasonic Cool Mist Humidifier now? URPOWER 5L Ultrasonic Cool Mist Humidifier uses mature Ultrasonic Technology with sleek body design, makes humidifier to be not only functional but also decorative. If the humidifier can’t put out mist, please try to pour out all water in the base, and refill the water tank. Specifications: Capacity: 5L. Voltage: 100-240V/50-60Hz. Power: 30W. Max Mist volume: 350ml/h. Working time: 14 -17 hours. Sleep Mode: You can choose sleep mode if you long press the power button. Short press the power button, you can choose the mist output: Low-Middle-High.
Reviews
Find Best Price at Amazon"Although, this was not a ‘life or death’ situation, humidifiers are a necessary appliance and used four seasons a year where we live in the Southwest desert area. The forced hot air that heats our home causes dry itchy skin, and furthermore it gives me headaches and it contributes to my husband occasional nosebleeds. In addition, since we were replacing the humidifier in the bedroom, I needed a silent one and without any lights that would disturb my sleep. Sweep a finger right over the sensor touch ‘power’ button on the front of the unit, and a small blue half circle and bar will light that looks similar to this symbol (‘ and this turns the power on to the lowest setting (indicated by a small yellow LED pinpoint light). This humidifier holds up to 5 liters of water, which is the equivalent of 1 gallon and 1 extra quart in American measurements. Since I need the humidity on a 24-hour basis, I now leave it at low, to maintain, and although it lasts longer than a day, I refill the water tank around the same time every evening. I have not experienced any condensation, therefore the area, the furniture, and all around the location of this humidifier remains completely dry. However, my favorite reason is that it is silent, and there are NO lights to glow or flash that would disturb my sleep at night."
"After accepting my climate altering limitations I bought a vaporizer that quit working the first time I turned it on followed by two humidifiers I was just as disappointed with. This review includes a photo taken while in operation so you can form your own opinion and I can quit typing. (The following is actually the number two entry currently displayed in the Safety Precautions section on page six)... Don't touch the transduction while working otherwise you will have the feel of pain."
"Assembly took seconds and required no tools or even peeks at the owner's manual, except to make sure I had installed the included filter with the proper side up. Speaking of the owner's manual, it's clearly been translated into English from what I'd guess was originally Mandarin, but was still easy to understand. The stainless-colored plastic trim pieces are a nice touch, and give this humidifier a modern, minimalist, upscale vibe. I pressed the POWER button again to set the unit to "HIGH" and the amount of vapor practically doubled. So it ran for about 19 hours on a single tank before automatically shutting itself off and turning on the "droplet with a line through it" light to indicate it was out of water."
Best Respiratory Aids & Accessories
The humidifier’s 1.5-liter tank delivers a moisture output of 150 milliliters per hour making it the perfect solution to relieve the symptoms associated with dry air. ULTRASONIC COOL MIST TECHNOLOGY: Safely moisturizes the air for up to 16 hours of continuous operation so you can breathe easy and get more restful sleep | High and low speed settings make it easy to adjust mist direction and speed to fit your comfort level.
Reviews
Find Best Price at Amazon">Daily: empty tank and base (get all the old water out; do a rinse but don't ever submerge base in water)."
"This humidifier works great to provide moisture to our bedroom."
"Excellent!"
"I purchased THREE ultrasonic cool must humidifiers last week (one for each bedroom in our house) and after using them for several nights, I absolutely LOVE them!! Update--I have now been using these humidifiers for almost one month, every night. My eyes are not dry when I run these every night, but when I travelled to D.C. recently and stayed in a hotel (and didn't have my humidifier) I got a nose bleed in the middle of the night and woke up with bone-dry mouth and eyes."
"The only thing with these types of humidifiers, in my experience, is you have to be careful when using the high setting, because eventually the air will get saturated and there is a high probability of condensation on the floor and any objects in proximity. To combat this, I use a water proof tray (which can be seen under the humidifier in all of the photos), but this requires making sure the directional spout dispenses above the tray. Also, on low mode, a tank of water lasts more than a day, so again, care and maintenance of this humidifier is minimal."
"You can't clean the bottom of the tank and pink slimy mildew builds up."
Best Humidifier Parts & Accessories
Why not get a URPOWER 5L Ultrasonic Cool Mist Humidifier now? URPOWER 5L Ultrasonic Cool Mist Humidifier uses mature Ultrasonic Technology with sleek body design, makes humidifier to be not only functional but also decorative. If the humidifier can’t put out mist, please try to pour out all water in the base, and refill the water tank. Specifications: Capacity: 5L. Voltage: 100-240V/50-60Hz. Power: 30W. Max Mist volume: 350ml/h. Working time: 14 -17 hours. Sleep Mode: You can choose sleep mode if you long press the power button. Short press the power button, you can choose the mist output: Low-Middle-High.
Reviews
Find Best Price at Amazon"Although, this was not a ‘life or death’ situation, humidifiers are a necessary appliance and used four seasons a year where we live in the Southwest desert area. The forced hot air that heats our home causes dry itchy skin, and furthermore it gives me headaches and it contributes to my husband occasional nosebleeds. In addition, since we were replacing the humidifier in the bedroom, I needed a silent one and without any lights that would disturb my sleep. Sweep a finger right over the sensor touch ‘power’ button on the front of the unit, and a small blue half circle and bar will light that looks similar to this symbol (‘ and this turns the power on to the lowest setting (indicated by a small yellow LED pinpoint light). This humidifier holds up to 5 liters of water, which is the equivalent of 1 gallon and 1 extra quart in American measurements. Since I need the humidity on a 24-hour basis, I now leave it at low, to maintain, and although it lasts longer than a day, I refill the water tank around the same time every evening. I have not experienced any condensation, therefore the area, the furniture, and all around the location of this humidifier remains completely dry. However, my favorite reason is that it is silent, and there are NO lights to glow or flash that would disturb my sleep at night."
"After accepting my climate altering limitations I bought a vaporizer that quit working the first time I turned it on followed by two humidifiers I was just as disappointed with. This review includes a photo taken while in operation so you can form your own opinion and I can quit typing. (The following is actually the number two entry currently displayed in the Safety Precautions section on page six)... Don't touch the transduction while working otherwise you will have the feel of pain."
"Assembly took seconds and required no tools or even peeks at the owner's manual, except to make sure I had installed the included filter with the proper side up. Speaking of the owner's manual, it's clearly been translated into English from what I'd guess was originally Mandarin, but was still easy to understand. The stainless-colored plastic trim pieces are a nice touch, and give this humidifier a modern, minimalist, upscale vibe. I pressed the POWER button again to set the unit to "HIGH" and the amount of vapor practically doubled. So it ran for about 19 hours on a single tank before automatically shutting itself off and turning on the "droplet with a line through it" light to indicate it was out of water."