7 Best High CADR Air Purifier (Certified Air Performance!) in 2023

The best bang for buck air purifier on the list with a high CADR. GermGuardian AC9200WCA is a highly regarded air cleaner that offers great value at an accessible price. Thanks to the side air inlets and uncluttered removable panels, it looks modern and sleek over most CADR air cleaners here. At a width of 17 inches and 27 inches in height, GermGuardian AC9200WCA commands little interior space compared with other big boys here. The bottom-to-top air circulation allows you to place the device by the corners with just a few feet of gap between walls. The 20.7 lb in weight is still manageable for room-to-room purifying when needed. Build quality is good for daily use, with no signs of off-gassing due to poor fitting. The extended 3 years warranty covers any manufacturer defects that hinder usability.

Moving to the easy to use controls that GermGuardian AC9200WCA is blessed with. You have a standard 3 fan speeds, a timer with preset 2/ 4/ 6 hours, and a filter change indicator that alerts you to replace the filter or UV-C light when it is due. Since no auto mode is available, everything has to be set accordingly before you leave for work or hit the sack. You also have the option to disable the ionizer and UV-C light during the purification.

At around 300 dollars after discount, GermGuardian AC9200WCA has an impressive clean air delivery rate of 310 cfm for dust, 346 cfm for pollen, and 244 cfm for smoke. A rare trade for an air purifier of its caliber outpacing most competitor models. At an ideal speed and room temperature, it can cover a respectable 378 square footage of room size with good air changes per hour. Highly suited for a studio, small apartment, bedroom, living room, basement, playroom, and nursery home plagued with bad air. Another perk is the noise level and power usage is on the lower tier. No problem running it comfortably during work or sleep. No other CADR air purifiers offer the air cleaning serenity that GermGuardian AC9200WCA gives.

Controversially, the biggest strength of the GermGuardian AC9200WCA air purifier is not its CADR but the 5-stage filtration. Starting with the reusable pre-filter that traps large PM10 particles and protects the HEPA filter from being damaged by sharp objects. The true HEPA filter removes 99.97% finer PM2.5 contaminants like mold, pollen, mildew, pet dander, and germs. The activated carbon filter neutralizes household smoke, chemical fumes, and odors through chemical adsorption. For bacteria, viruses, and other pathogens, UV-C light radiation permanently kills biological pollutants with no chance of growth. Finally, the ionizer electrostatically charges negative ions that merge and weigh down airborne particles for the filter to capture. Both ionizer and UV light is safe and effective filtration but play no role in the CADR measurement.

On to the few drawbacks we need to touch on. GermGuardian AC9200WCA does not have an outrageously expensive price tag (around 300 after a discount). The annual filter cost can be a long-term burden, especially when indoor air quality is less than ideal. The UV light bulb intensity will drop substantially, resulting in reduced performance if it is not replaced in time. Another minor complaint is the lack of air quality indicators and Auto mode that can be useful at times. Not a deal-breaker for a CADR orient model as long as you understand what you're getting at.

In short:A HEPA 5-stage air purifier without the outrageous price tag. The perfect balance between performance and cost. ⚠️ Buy this if you want a decent CADR air purifier at a more attainable price.

When the indoor air is at an unhealthy level with visible PM10 pollutants, you will need a high CADR air purifier like Alen BreatheSmart 75i. This high-performance, console-sized air cleaning machine stands at an 18.5 x 27 x 11.5 inches dimension and a hefty 32 pounds weight. Not the biggest model on this list, but it will still take up some room space and thus can be problematic for a small room. Design-wise, the classic side air inlet setup supports many customizable panels you can swap out to match your interior design. There is also an air quality indicator that illuminates blue, yellow, or red light to reflect the room's air condition. Fitting and build quality are second to none, as evidenced by the Lifetime warranty (with subscription filter).

With tons of embedded features, usability is great with the Alen BreatheSmart 75i air purifier. You can cycle through the 4 fan speeds, optional ionizer activation, child-lock that locks the setting, 3 preset timers to shut down the machine, and our favorite auto mode. With energy-saving auto mode, BreatheSmart 75i will only run at a higher speed when there is an increase of airborne pollutants in the air. The advanced Smart Filter calculates the filter life, so you only have to replace the dirty filter when it is completely worn out.

Here's why we picked the Alen BreatheSmart 75i air purifier when it comes to air cleaning performance. It delivers a strong 347 cubic feet per minute for dust, pollen, and smoke. Overly exceeded our minimum 200 cfm CADR threshold. Complemented by the 150-285 cfm of airflow delivery rate, the recommended room size is up to a wide 1,100 square footage at regular air changes per hour. It is ideal for large room sizes like living room, bedroom, basement, garage, kitchen, and home office. If your home constantly suffers from bad air quality from external pollutants, Alen BreatheSmart 75i can be a difference-maker.

Alen BreatheSmart 75i is not the most silent air purifier in the market despite the incorporation of WhisperMax technology. The 42 to 56 decibels noise level is on the louder side due to the high airflow output. It is still suitable for everyday use as long as you keep the fan speed low. Power consumption is a tad high, between 64 to 105 wattage output per hour, tallying with the CADR. You should still run it 24x7 with Auto mode enabled to conserve energy.

With its strong CADR, Alen BreatheSmart 75i can remove all types of airborne pollutants, but you need to choose the right set of filters. The first-stage pre-filter traps large particles like dust and prevents them from clogging the HEPA filter. The default HEPA-Pure filter removes 99.97% of airborne particulates as small as 0.1 microns, including bacteria and viruses. For smoke filtration, you will need to upgrade to either mold removal HEPA-Silver filter, HEPA-FreshPlus, or HEPA-OdorCell filter that comes with additional deodorization filtration. Since the customized filter does not impact the CADR outcome, we recommend going straight for the best HEPA-OdorCell filter upgrade. Lastly, the optional ionizer generates millions of negative ions that attract and pull down positive ion pollutants in the air for the HEPA filter to capture. The technology is safe and effective but does produce a very insignificant amount of ozone (CARB approved). Since ionizer plays no role in the CADR ratings, you can turn it off as you wish.

The drawback of the Alen BreatheSmart 75i air purifier is the cost. Not only will you have to take in the 700+ dollar selling price, the customizable panel costs money, and so does the filter replacement set. Opting for the upgradeable filter will add another 30-40 dollars to the total cost annually. The abovementioned noise is also on the louder side when running at a higher speed. If you are not a big fan of white noise, it can be distracting for those working from home or having a baby to take care of.

In short: A premium, high CADR HEPA air purifier that offers customization in filtration and outlook. An Addon filter upgrade is a must to complete the purification. ⚠️ Buy this if you are OK with the extra charges on top of the selling price.

An expensive, clean, modern air purifier with a touch of elegance. Medify Air MA-112 is undisputedly the best CADR performance model yet considerably small compared with some of the models here. The sleek design does not impair airflow distribution in any shape or form. At 16 x 28 x 15 inches in size, you will have no issue finding a place for it unless you live in a shared bedroom, dorm, or small cubicle with limited spaces. The heavy 32 pounds weight does pose more of a problem when you try to move it around. Otherwise, this is a very livable air-cleaning machine.

Available in 2 colors, Medify Air MA-112 air purifier's simple controls will work like a charm in cleaning unhealthy indoor air. You can cycle through 4 variable speeds or activate shutdown timers to manage the air cleaner runtime. The convenient child lock mode locks the setting and prevents any unintended adjustment. Dimmer light mode disables all LED indicator lights that can be annoying when used during the night. A bonus in Medify Air MA-112, there is a built-in sensor to support the air quality indicator, sleep, and auto mode. In auto mode, the air cleaner will only run at a higher speed when a significant concentration level of pollutants is detected. AQI displays the room air quality's current status; from there, you can see how the air purifier will react to it. Lastly, a fairly accurate filter replacement indicator will remind you to change the filter after 3,000 hours of air purification.

Safety-wise, Medify Air MA-112 air purifier is CARB (California Air Resources Board) approved ozone-safe, AHAM tested, and ETL listed. Build quality is tight, with the goal set for long hours of operation. The lifetime warranty is the perfect testimonial of its long-term durability providing only an original Medify Air filter is used. Simply put, with Medify Air MA-112 air cleaner, you will be set for life.

Great for hypersensitive person, Medify MA-112 air purifier CADR ratings is at an impressive 950 cubic feet per minute (cfm). A remarkable air cleaning achievement (3 times more to exact) considering its segment. With the high CADR. Medify MA-112 can clean 2,500 square footage of room size in 30 minutes or 2 air changes per hour. Double the air changes per hour to 4 (15 minutes); it can still reach 1,250 square footage of air cleaning space. Suitable as a whole-house air purifier or set for living room, master bedroom suite, basement, nursery, and home office. Unfortunately, the noise level will take a hit to accommodate the strong airflow. Anticipate a loud 70 decibels when the air purifier runs at max speed. You can keep it at the lowest speed when you need quietness e.g. during work or sleep. As an Energy Star rated model, power usage is reasonable for its class and the strong 950 cfm output. You can run it 24x7 with minimal impact on your utility bill.

Combining the best CADR and Medical-grade filtration, no pollutants will be too difficult for Medify Air MA-112 air purifier. The dual air intake pulls in air from both sides for the first round of filtration by the pre-filter. With both pre-filters capturing all the large particles, the H13 HEPA filter trap remaining microscopic particles as small as 0.1 microns with an efficiency of 99.9%. This includes lead dust mites, mold, pollen, pet dander, bacteria, and virus carrier. The activated carbon filter absorbs odor from pets, cooking, and toxic fumes from VOCs, asbestos, cigarette smoke, formaldehyde, and benzene. The optional ionizer diffuses charge negative ions to latch and merge pollutants in the air. This resulted in the latched particles falling from the increased weight allowing the medical-grade filter to capture them. Medify Air's 4-stage filtration efficiency is proven beyond doubt, with only Blueair Pro that matches its superiority.

There is nothing bad to say about the Medify Air H13 air purifier when money is no issue. Sadly, not everyone has the luxury to do so. You might be better off with a slightly lower variant of Medify Air models such as MA-50 or MA-40. As always, the high filter replacement set will cost you dearly, particularly in an unhealthy air environment. Something you need to seriously consider as the recurring fees will keep on coming. If you want to max out on the CADR performance, the whirring fan noise can be distracting when you leave it at full blast. Overall, if you are staying in a single-floor home or studio room with limited partitions, it is no brainer to invest in Medify Air MA-112 air purifier for a lifetime of clean air.

In short: The top-of-the-line Medify H13 air purifier with the highest CADR ratings and price tag. Look out for the recurring filter cost as well. ⚠️ Buy this if you want the best CADR and can afford to maintain one.

The best comes from Sweden, and Blueair is the key to unlocking everlasting clean air. Blueair Classic 605 air purifier is nothing short of amazing when it comes to clean air delivery rate. This white powder-coated machine host a series of HEPA air filtration that you will not find elsewhere. At a large 20 x 26 x 13 inches in dimension and a 35 lb weight, its simplistic approach blends well in the modern exterior but at the cost of space and movability. You will have to hard time moving it around even with the 4 durable casters to support it. It is essentially a set it and leaves it type of air purifier.

With a slight learning curve, Blueair 605 is easy to use once the Wi-Fi setup is completed. There are 3 buttons at the top: the fan speed, filter reset button, and Wi-Fi button. The Wi-Fi button allows remote access via phone pairing for advanced function and remote access. By downloading the Blue Friend app at iTunes or the Play store, you can use your smartphone to control the fan speed, LED light, child lock, or set up night mode in any part of the world. There is also a scheduler to help manage Blueair 605 operational hours and other useful information to help you achieve the pinnacle of clean air. For those that prefer the conventional method, you can also turn on/ off and physically set the fan speed of Blueair via the control panel. Overall, the build quality is exceptional that guarantees no off-gassing from its eco-friendly materials. The 5 years warranty will give you deservingly peace of mind throughout the course of ownership.

An official AHAM verified model, Blueair 605 can quickly clean the air in a room with CADR ratings of 500 cfm for dust, 640 cfm for pollen, and 500 cfm for smoke. Far greater than the majority of the air cleaners in its class. Airflow delivery rate tally with the CADR at a max 650 cfm and large room size equivalent of up to 775 square footage. You can use it as a whole-room air purifier in a single-story home, apartment, condo, and office with doors wide open. The noise level is surprisingly livable, even with the strong airflow output. Blueair 605 only generates a low 23 decibels when running at the lowest speed to a normal conversation at 62 decibels at max speed. Far more efficient than MA-112 and Blueair Pro series counterparts. The same goes with the power consumption; anticipate a low 15 wattage hourly to a reasonable 100 watts when it is set to max.

With the strong CADR, no airborne particles will be able to get away from Blueair's trademark electrostatic and mechanical filtration. First, the drawn-in air will be electrically charged in the encapsulated particle-charging chamber. This allows the charged particles to be more adhesive to the gradient structure particles filter resulting in a 99.97% removal efficiency as small as 0.1 microns. This includes dust mites, mold spores, pollen, bacteria, and viruses. On top of it all, there is antibacterial polypropylene fibers coat that inhibits the growth of microorganisms. Very useful if you are living in a humid area notorious for creating a habitat for pathogens. Lastly, the SmokeStop Carbon filter neutralizes toxic fumes, chemical smoke, and household odors, including ozone. Every filter works as advertised, and you will feel the changes in air quality in a matter of hours

Changing the tune, Blueair 605 has most of the drawbacks you would expect from a high CADR air purifier. Cumbersome, as it is designed to be bulky to fit in the large fan motor and filters. The replacement filter will cost you between 230-460 dollars annually if you follow the exact interval timeline. The lack of auto mode is disappointing, but the expensive price tag is the biggest stumbling block for most people. Nonetheless, nothing is more valuable than your health, and clean air is a big part of it. If Blueair 605 pricing doesn't cut it for you, downgrade to 405 or 205 series if you want something cheaper but with an identical specification.

In short: A HEPASilent air purifier that gives you more than just high CADR ratings. The high price tag and maintenance fees will limit its appearance. ⚠️ Buy this if you want a proven HEPASilent technology and the best CADR performance Classic Blueair has to offer.

Forget about the M and L variant Blueair Pro XL is the best CADR air purifier you can get right now. This premium, niche air cleaning machine comes in at a tall 20 x 44 x 10 inches in dimension. While the size is still manageable, the 71 pounds weight limits badly on its versatility. Even with the carrying handle, you can forget about room-to-room purifying as it is too much effort to do so. you'll have to pick the right spot to place it so Blueair Pro can cover multiple places of air cleaning at one go. With the assuring 5 years warranty, build quality is outstanding with no signs of air escaping or poorly aligned case. After all, this is Sweden's best of the best.

Blueair Pro XL is straightforward to use with the inclusion of the Air Intelligence Module. In auto mode, the air purifier will only run at higher fan speeds when indoor air quality is deteoriating. You can still use the manual 3 speeds mode but it is not necessarily at this point. A red filter light indicator will illuminate between 6 to 12 months when the trio filter requires replacing. Lastly, there is a dual air quality indicator that displays the air-suspended particles (PM2.5) and gaseous contaminants (GAS) levels. 1 green bar equals good indoor air quality while 3 bars (green, yellow, and red) equals unhealthy air quality level. Timer is the most notable missing feature but that hardly hamper the overall usability.

Here's why Blueair Pro XL is the undisputed, best high CADR air purifier for residential and commercial use. It is tested by AHAM with the official CADR ratings of 950 cfm for dust, 900 cfm for pollen, and 800 cfm for smoke. The air purifier will promptly remove airborne pollutants before it has a chance to trigger your allergies. The German-engineered fans output a strong 990 cfm airflow distribution cater to 1,180 square footage of air cleaning coverage. Ideal for large room sizes like office, living room, nursery home, classroom, meeting hall, cafeteria, and study area. Noise levels can be subtle between 32 to 58 dB(A) despite the abundance of clean air delivery thanks to the sound dampening material. Energy usage is unavoidably high with up to 256 wattages hourly. Compared with models such as BreatheSmart, the power consumption is 3-4 times higher which will be reflected in your monthly bill. This is not the model you want it by the bedside.

Here's where all the money goes to. Blueair Pro XL is the highest tier in its series so naturally, it comes with the best trio encapsulated particle-charging chamber setup. the ionizer electrostatically charges particles into the filtration. The charged particles will be more sticky to the V-shaped dense filter allowing the trio Pro3 Particle Filter to swiftly remove 99.97% of the biological pollutants as small as 0.1 microns including pet dander, mold, bacteria, and viruses. The trio Pro SmokeStop filter absorbs primarily chemical fumes and odors including radon, ammonia, CO, CO2, VOCs, ozone, and asbestos that is common in old buildings. As an extra layer of protection, the filter media is made from waterproof, natural antibacterial polypropylene fibers that inhibit mold and bacteria growth. Very important to curb down the reintroduction of germs into the air space.

Let's divert our attention to the common downsides of high CADR air purifiers. Blueair Pro XL is the biggest and heftiest air purifier here which heavily impacted its mobility. Although stable, the 32+ pounds weight can be a safety concern when you have children or pets playing near the machine. You also have to bear the 2,000+ dollar price tag and exuberance trio filter costs that can go as high as 1000+. Perhaps the biggest letdown is the lack of Wi-Fi support, remote control, and timer features at this price tag. That said, Blueair Pro XL is a very niche product that caters to those with severe respiratory issues. If your focus is getting the best CADR air cleaner, look no further.

In short: Blueair Pro XL is the ultimate CADR purifier that almost nobody will buy. If you can afford one, this could be the smartest health decision you will ever make. ⚠️ Buy this when money is no objection.

A surprising entry to the CADR air purifier world, Gocheer GH-Monster is a modern, smart air purifier that is still somewhat accessible (under 600). The futuristic design and dual air intake setup come in at a 15.9 x 31.9 x 14.8 inches dimension size. Not too big for a high CADR air purifier but you will definitely feel its presence. Weight-wise, the 34.9 pounds weight is well supported by the integrated 360 degrees castor wheels and universal pulley. You will have no problem moving Gocheer GH-Monster around. Finishing up the exterior tour is the front vertical LED light that illuminates when the air purifier is turned on.

Gocheer GH-Monster Smart air purifier is a powerhouse when it comes to usability. The glossy touch controls panel allows the easy operation of the 4 fan speeds, shut down timers, lighting dimmer, child lock, and filter reset. Child lock is a godsend for those with children at home and light dimmer clearly benefits from the deactivation of indicator light. With the built-in laser particle sensor, you can activate sleep mode and auto mode that automatically set the fan speed to high when a high concentration level of indoor airborne pollutants is detected. Another unique feature in Gocheer GH-Monster is the Wi-Fi smart app remote control. Just like Blueair 605, you can monitor and control the air purifier remotely via your smartphone or tablet. A convenient and seamless experience that can be done at a click of a button. On the whole, Gocheer GH-Monster 4-in-1 air purifier is very well put together for everyday use. It is also ETL/ UL listed, CARB approved, and asthma & allergy-friendly certified by the Asthma and Allergy Foundation of America.

On paper, Gocheer GH-Monster is the best CADR air purifier you can get right now. It features an industry-leading 1000 cfm CADR that can swiftly remove airborne allergies before it causes any harm. Outrank even the greatest model such as Medify Air MA-112 and Blueair Pro XL. The dual suction covers 2,500 square footage of air cleaning space with 2 changes per hour/ 30 minutes. You can also increase the air changes frequency clean to 4 or every 15 minutes at a reduced 1,250 square footage. Ideal for living room, hospital, office, basement, studio apartment, or single-storey home as a whole-house air purifier. Noise output can be whisper-quiet if you run it in sleep mode at around 25 decibels but anticipate a more realistic 40 decibels on daily use. Power consumption is also decent at around 35% more energy-efficient over the same category models. A worthy consideration for those that count on every penny.

Double the filters, double the protection against airborne pollutants. Gocheer GH-Monster Smart air purifier 4/5 stage filtration will protect you from inhaling harmful allergens by swiftly capturing them. The twin washable, polypropylene pre-filter blocks pet hair, lint, fiber that would otherwise clog the H13 filter. The dual medical-grade HEPA filter capture 99.97% fine allergens as small as 0.3 microns from both direction. The antibacterial cloth filter reduces the growth and spread of mold spores, bacteria, viruses that have been captured by the HEPA filter. The charcoal-based activated carbon filter neutralizes chemical fumes like VOCs, asbestos, radon, ozone, cigarette smoke, and formaldehyde. Overall, the filtration grade is excellent but just slightly under par with Blueair offerings. Pairing with the high CADR, it will ensure a continuous flow of fresh air as long as Gocheer GH-Monster Smart is kept on.

Gocheer GH-Monster Smart might have every single premium feature available, it comes with a hefty price tag that can deter its accessibility. Besides the cost, you will have to account for the recurring dual filter maintenance fees that can go as high as 260 dollars in an unhealthy air environment. Unless you go for a third-party filter (not recommended) it will not run properly if you do not replace both sides of the filters. So if you are tight on budget or currently staying in a shared room, you might be better off with a smaller air purifier.

In short: Pricey it may be, this could be the single H13 HEPA air purifier with high CADR you will ever need for your home. ⚠️ Buy this or at least consider over BreatheSmart or GermGuardian AC9200WCA.

The controversial included in the list yet rightly so. LEVOIT Core 300 is a CGD 2019 award-winning air purifier that has excellent size to CADR ratio despite the weak output. Comes in at an affordable under 100 price tag, the small 8.7 inches diameter, 14.2 inches height, and 8.8 pounds weight makes it highly accessible and portable unlike other high CADR air purifiers here. You can place it high off the ground like the work desk, nightstand, cabinet to take advantage of the compact size. It is also the only air purifier that you can bring around wherever you go. Build quality is superb even though you are paying only a fraction of what other CADR air purifiers here cost. complemented by the California-based customer service support and a long 5 years warranty.

Continue with the touch controls. Levoit Core 300 ozone-free (CARB compliant) means functionality is simple and easy to get the grip on. You can manage the airflow via the 3 fan speeds or choose the manual sleep mode ready for night use. There is also 2, 4, 6 8 hours timer option that you can choose when to turn off the machine. The child lock button allows you to lock the controls to prevent anyone from meddling with the setting. The light off button will turn off all indicator lights to reduce eye glaring at night. Lastly, the Filter reset button reminds you to change the filter every 6 months. A relatively short lifespan but understandably so given the smaller filter size.

Besides the smaller presence, Another advantage of the Levoit Core 300 True HEPA air purifier is the silent operation averaging at only 24 decibels noise. Even at max speed, the noise output will not exceed 50 decibels breaking point. Perfectly usable for work, relaxation, and sleep that should cover most household activities. Again, you can manually select Sleep mode to keep the noise level down. Power consumption is equally efficient to at only 45 watts hourly. Unlike the rest of the CADR air cleaners here, Energy Star Core 300 will not burden your electrical bill regardless of how you use it.

Here's where the big gap between the rest of the high CADR air purifiers here. LEVOIT Core 300 Vortexair Technology outputs a consistent airflow circulation that is optimized for small room sizes. The official clean air delivery rate stands at 140 cfm for dust, 145 cfm for pollen, and 141 cfm for smoke. Far from outstanding but it will serve its purpose well. At full speed, the air purifier will distribute clean air of up to 219 square footage at 5 air changes per hour. Ideal for close-range use with limited room spaces such as bedroom, office cubicle, dorm room, small basement, and attic. You can even place multiple air purifiers in a home without having any issue of the air cleaning overlapping.

Despite the smaller form factor, Levoit Core 300 comes with complete mechanical filtration to support its clean air delivery rate. The initial pre-filter traps dust, hair, lint, the debris and protect the HEPA filter from being clogged by the large particulates. The imported true HEPA filter captures microscopic particles as small as 0.3 microns like mold spore, mildew, pollen, fungi, and germs in the air. The granular activated carbon filter removes nearby smoke and odors via its chemical adsorption. Surprisingly, there is even space left to include one of the 3 upgradable filters from Pet Allergy, Toxin Absorber, and MB Filter. Pet Allergy is effective in removing pet dander, odors, diapers, and cooking smells. Toxin Absorber Filter focus on neutralizing chemical fumes from cigarettes, vehicle exhaust (CO), ammonia, radon, and VOCs. MB Filter anti-microbial element impedes microorganism growth and is our preferred choice.

As we alluded to earlier, Levoit Core 300 is not exactly a high CADR model that max out at only 145 cubic feet per minute. It is quite the opposite at around 7 times less of what Gocheer GH-Monster Smart air cleaner CADR is outputting. Nonetheless, the weaker airflow does drive the price down including the filter recurring cost. Adding the portable form factor into the book, this is undoubtedly the perfect starter air purifier for you to try out before investing in a full-blown CADR air purifier.

In short: For just a shy of 100 bucks, Levoit Core 300 is the perfect start air purifier for those that need a small air purifier with reasonable CADR output. ⚠️ Buy this if you want a budget, compact HEPA air cleaning machine for desktop and bedside use.