After 30 hours of careful testing, we chose the Air Mentor PRO as our top pick based on its ability to detect, what we believe, to be the top threats to air quality in the everyday home. The Air Mentor PRO has a sleek design, is easy to install and maintain, includes software that you can link to your mobile device, and offers the best package deal overall.
Our runner up pick this year, in a very close second place, was the Awair Smart Air Quality Monitor with LED display, and this only lagged behind slightly because it does not detect carbon monoxide like the Air Mentor monitor.
For those on a budget looking to detect carbon monoxide only, we chose the highly-rated, beautifully designed Nest Protect 2nd Generation Smoke + Carbon Monoxide Alarm as our Budget pick. With any of these models, you can’t go wrong. But you should consider the needs of your household or business to decide which model to buy. We’ve spent countless hours reviewing the models below so that you can easily make the smartest choice.
Table of Contents
- A Little Background
- The Benefits
- Choosing the Right Air Quality Monitor for you
- Buying Guide
- Our Top Pick
- The Runner Up
- The Budget Pick
- The Competition
- Wrapping Up
A Little Background
You would do anything to protect your home and your family. You buy organic for your loved ones to avoid toxins in your food, baby proof your home with little ones around, conduct background checks on the babysitters, and regularly check the smoke alarm to make sure the batteries aren’t past due. However, one risk that many of us forget about is the quality of the air we breathe in within our home. Even if you already have an air purifier, getting an air quality monitor provides an extra level of safety and comfort under your roof by confirming that every breath is safe. As we shall see, current models on the market can provide extra conveniences, sometimes just at your fingertips through your smart phone or laptop. These models all have different pros and cons, so let’s first review the reasons why you should buy one, then move onto this year’s top picks followed by ones that are a bit lower on the must-buy list.
Imagine you’re stuck in traffic, windows down, breeze blowing in your hair, and you’re unwinding after a long day. Suddenly, a car in front of you lets out a big cloud of exhaust right in your face. “Yuck!” You’re thinking “What did I just breathe in?” What if that happened every day, but you couldn’t smell or see the smog? Your body was just taking it all in, unknowingly. Researchers are discovering that indoor air pollution can be a major issue in some homes and businesses, and more and more people are finding ways to screen for it early to prevent future health issues and other unpleasantries.
There are several sources of indoor air pollution, and this list spans everything from building materials to your home DIY projects: paint from the walls, building materials, escaping gas, wet or damp carpet left unattended, and materials for heating and cooling your home can all leave residue behind that can cause indoor pollution. Pollutants can accumulate as a result of a home not being properly ventilated as well. Cooking, smoking, cleaners, and other household products can linger. According to one New York Times’ article and scientists at the Energy Department, simply the act of cooking can create dangerous levels of harmful gases known as “volatile organic compounds” (VOCs for short) and even carbon monoxide. Indoor air pollution can cause a whole host of health problems that can appear immediately, or years later depending on your age and current health status. Asthma, coughing, allergies, bronchitis, pneumonia and even low quality of sleep are all negative health effects of chronic or immediate exposure to poor indoor air quality.
People buy air quality monitors for a variety of different reasons. Maybe you would like to know when it’s time to change your air filters. Perhaps you are a home inspector and want to measure possible hazards in homes on the market. Maybe you have allergy issues and need to know when to pull out the anti-histamines or close the windows. You could be a business owner wanting to take control of employee health and minimize sick days. Whatever the reason, there is significant research pointing to reasoning behind why all of us could benefit by paying more attention to what’s in the air. For those of us with allergies (raising my hand over here!) and other chronic health conditions, or even those of us who just want to be more conscious of controllable health factors like indoor air quality, an air quality monitor is the ideal way to monitor what you can’t see. Below we’ve tracked countless numbers of this year’s models to bring you a list of top contenders based on affordability, aesthetics, and substances measured.
Choosing the right Air Quality Monitor for You
When making your purchase, it’s important to decide exactly what you expect it to do and how much functionality you wish it to have. Many households are only concerned with proper levels of carbon monoxide in their home. Therefore, we’ve provided a low end budget pick for those individuals. However, those with allergies or asthma concerns may want to invest in a model which offers detection of small particles and VOCs. We were not able to find many models which offer this sort of protection, but we did find one available to mass market through Amazon just in case.
Air quality monitors vary in sensitivities and the gases they detect. Some monitors market themselves as a sort of weather station, and project data just like an IPhone weather app forecasting humidity, temperature, and barometric levels within the home. Humidity is an important factor to detect: low humidity can trigger sore throats and dry nasal passages causing chronic nose bleeds. Humidity that is too high can cause dampness in rooms leading to mold and/structural damage, especially within basements or attics.
Other monitors promise to detect certain harmful gases such as carbon dioxide and carbon monoxide. High levels of carbon dioxide, and even levels that are too low, can indicate that your air conditioner may not be working correctly. If carbon dioxide levels are too high, it can signal that air ducts are blocked or not flowing properly. Carbon dioxide that is two low can be a sign of a leak in your ventilation system for your home or business. All of these gases are important to detect for the general population, but your priorities and needs are different from other families.
While several monitors we found monitor just air quality, others even throw in a camera and market the monitor as an all-inclusive, one stop shop security device. One model we found even serves as a high-tech baby monitor! These models prove that the market for these products can get as minimalist, or as aesthetically pleasing, as you desire. Displays, data presentation, setup and maintenance all vary significantly among these models. Your choice depends on the individual needs for you and your family.
There are several unique circumstances to consider. Within our research, we discovered that there are many types of indoor air pollutions that can be harmful to one’s health. Therefore, we feel it imperative to mention radon detection as an area of concern. Radon continually came up when researching indoor air pollution as a top offender. Radon gas is the second leading cause of lung cancer according to the United States Environmental Protection Agency. It is a naturally occurring radioactive gas that you cannot see, smell or taste. According to the Office of Disease Prevention and Health Promotion, approximately one in fifteen homes have a level of radon considered high or undesirable. While this gas is one of the top offenders on the indoor air pollution list, most products manufactured and marketed as “air quality monitors” will not detect radon in the home. We were extremely surprised by this since it seems to be in a number of research articles on indoor air pollution. However, there are monitors manufactured that exclusively detect radon. Please note that most radon detectors offer just that, and no other perks as compared to an air quality monitor. You can also purchase a radon testing kit for single time use rather than ongoing monitoring.
Reviewing many models after countless hours of research has taught us one thing: not all models are created equal, and most of them do not even have the same capabilities in what they detect. Because the products differ so much in make and model, we decided that our top pick would be the most ideal for everyday use within a home and offers detection for the most common offenders for indoor air pollution. Most monitors will usually detect carbon monoxide, but our criteria focused on a more comprehensive approach for the top pick (i.e. what we would practically buy for our own home), then gets more specific based on predictable consumer behavior: price, ease of installation, and specificity of testing. Of course, the budget pick was just that: the most affordable model that measured some standard of air quality and was widely available for use. In addition, all of our top picks are all within the same price range and have the ability to link data to a mobile device or smart phone. Bottom line, we strived to make our top picks the biggest bang for your buck in terms of what they actually detect. There are a few picks that frankly just seem cool, but may be a bit ahead of their time, and these are within the “Competition” category.
Our Top Pick: Air Mentor PRO A 6 in 1
The Air Mentor PRO is manufactured by CoAsia Microelectronics Corporation and, up until recently, seemed to be largely distributed to the Asian Market as apparent by its paucity in American reviews. That should not disrupt the consumer from purchasing it though. The Air Mentor PRO is winner of the 2015 coveted Computex D & I awards, a prestigious distinction in the technology sector. It also seemed to have the most comprehensive detection coverage of any mass available air quality monitor for household use. The PRO device promises to deliver detection of carbon dioxide, carbon monoxide, VOCs, particle matter both large and small, temperature, and relative humidity, and is the only device on our list that does. CoAsia lists the VOCs detected unlike many of the other models: alcohols, aldehydes, aliphatic hydrocarbons, amines, aromatic hydrocarbons, carbon monoxide, ketones, organic acids, and even methane. The company actually manufactures two models of Air Mentor, but our top pick is the PRO, and this is because it detects far more than the standard model.
Because the Air Mentor PRO seems to be so all inclusive and detect almost every factor that would affect individual health, it is at the top of our list. Both the standard and PRO device are small in size, mountable to the wall, and, like many of our other featured devices, has its own app that can be installed on an iPhone 5, 5s, 6, 6+, or Android device.
The Air Mentor PRO is designed for indoor use only like many of our other models. The device itself does not have a display, so one would have to download the Air Mentor App to view any readings. But, the flat, aesthetically pleasing triangular device easily mounts to the wall and displays green, yellow and red lighting to show the 20,000 foot view of how your air quality is doing at that time.
The App of course offers more details on the six qualities noted above. It displays the following numbers indicating user access to the 6 levels advertised: PM2.5 (small particle matter – perhaps mold), PM10 (large particle matter – things like pollen that would cause allergies), C02 (carbon dioxide), TVOC (total VOC), temperature, and humidity. The app provides a “Knowledge Center” to inform users exactly what the numbers mean with tips on what to do if any of the levels are not normal. We should note that users seem to appreciate the blue tooth technology which apparently makes the device easy to move if needed. You can check the air quality in different parts of your house, or even take the device with you on the road if needed. Check out the air you breathe in your office, or anywhere for that matter!
While the device is our overall winner, it is not perfect. While reviewers seem to appreciate the functionality of the Air Mentor PRO, they have identified bugs in the software that seem to be improving over time. We do not see this as a deal breaker since software reports have become better over time. Another issue came up in customer reviews, but this is not unique to Air Mentor: when VOCs are detected, the model will not distinguish which of these caused the alert, and reviewers commented that this would be nice to know. However, this was also a complaint with our other models that detect VOCs. We should also note that while the device does detect particle matter, it may not be as sensitive as other devices on the market targeting just this measurement. One user who purchased both the Air Mentor and the Dylos model we will describe a bit later mentioned that the Dylos monitor showed levels of air particles that the Air mentor simply did not. So it may be safe to assume that perhaps this model is not as sensitive, or that the Dylos may be overly sensitive.
We should also note that the model is a bit more expensive than other comparable models, but not by much at all. We believe that for functionality, portability, installation, price, and comprehensive detection, this model is a winner. Based on its technology award accolade, we will take the leap and put this at the top of our list.
The Air Mentor PRO is very highly rated.
Pros: Comprehensive detection of air quality factors: small air particle matter, large air particle matter, VOCs, carbon dioxide, temperature, and humidity, positive reviews on software and app, portable
The Runner Up: Awair Smart
This was the one product we found that seemed to have it all, almost, for equal price as its competitors. It also includes a one-year warranty, which did not seem to be consistent across the board.
The Awair Smart Air Quality Monitor with LED display was developed by a startup; its founders both had children who suffered from allergies and eczema, and learning about what triggered their children’s ailments was extremely important to them. They wanted to create a product that not only provided notifications that something might be in the air, but instructions on exactly how to solve the problem. Hence was born the Awair Smart Air Quality Monitor. This product provides data on temperature, humidity, carbon dioxide, small particles (dust) and VOCs. The Awair product has software that can link to your iPhone or mobile device. It has an easy to read, clean lined dashboard, and reviewers seem to enjoy the program. With easy to install software packaging, an aesthetically pleasing appearance, and the Awair monitor is a winner for any home. The LED screen is not only beautiful, but extremely informative. The Awair program not only provides alerts, but also provides real time recommendations on how to address the alarm. It’s easy to read interface uses a color coded green-yellow-red system so that families, children included, can easily read when something’s gone wrong. In addition to the color system, the device uses a score from zero to 100 to provide a more specific reading on the air quality within one’s home. This information is available on the app dashboard or on the Awair LED screen.
There are a couple of downsides to the product that we do not necessarily see as deal breakers. It does not monitor carbon monoxide, which is the primary reason why this fell to a close second place. However, we should note that carbon monoxide detectors can be found relatively cheaply like a smoke detector. In addition, while the product does monitor VOCs, reviewers comment that that it would be a nicety if the product showed additional data on exactly what is behind the numbers. A user may find that they appreciate the Awair’s smart recommendations more than carbon monoxide detection.
Pros: All inclusive package: monitors VOCs, temperature, humidity, carbon dioxide, and small particles; aesthetically pleasing, easy to install software and hardware, functional and easy to interpret software display (based on reviews), provides recommendations for future actions based on device readings, highly rated on Amazon (four stars and above)
Cons: Does not measure carbon monoxide or specify details on detected VOCs
The Budget Pick: Nest Protect 2nd Generation Smoke + Carbon Monoxide Alarm
The Nest Protect 2nd Generation Smoke + Carbon Monoxide Alarm is basically an extravagant smoke alarm with the added feature of carbon monoxide detection. The NEST Company was founded by Apple Engineers in 2011, and this product definitely reeks of all things Apple, but in a good way. For someone only seeking carbon-monoxide detection who prefers a clean-lined appearance and convenience, this would be our pick. Packaging is attractive, and installation is seamless, and maintenance is minimal.
Like the NEST thermostat system, the NEST Protect offers connections to your phone or smartphone tablet. Check on your home from the office, or from half a world away on vacation. The NEST app conveys specific messages about any alerts to remove any uncertainty you may have while away. At home, the device sends very specific signals telling you what any and all alerts mean. This is perhaps the most unique, but pleasant feature about this particular alarm even if functionality is limited. For all of you people like me who have been living without a smoke detector after taking the batteries out to stop any beeping, this alarm is for you. The NEST protect completely eliminates the trial and error process with a female, soothing voice telling you exactly what issue may come up, or a simple lighting system. For instance, when it’s time to change the battery (though the installed battery promises a five year life span), the product will have a peaceful, yellow glow gently urging you to do so, instead of the usual jarring alarm sounding either impending doom or simple maintenance. For instance, if NEST protect detects a moderately high level of carbon monoxide in the home, it will alert you of just this, using words. For more urgent situations, it will convey this message as well.
The Nest Protect 2nd Generation Smoke + Carbon Monoxide Alarm is a standout pick
Pros: budget conscious, easy to install and maintain, aesthetically pleasing, detects carbon monoxide and smoke
Cons: does not detect small particles, humidity, CO2, N02 or VOCs
Netamo Weather Station for Smartphone
The Netamo Weather Station for Smartphone is unique because it has the ability to monitor outdoor as well as indoor air quality.The model claims to be fully weatherproof, although many users comment that it might be best to enclose it away from the elements for outdoor use. One might wonder how accurate it may be in those circumstances, but reviewers on Amazon have consistently rated the device highly. Founders of the Netamo company claim that the indoor outdoor feature makes the model unique in its class. Users can plan outdoor activities and monitor their gardens and yards, having more improved patterns of watering for days when it rains. Netamo also makes a rain gauge and a wind gauge which can be combined with any of its devices. Know what’s going on, inside and outside your home, at all times.
It is marketed and designed to be purchased and added onto later with additional modules for different areas of your home, including your patio or garden, which can all work together under one app. This is a unique feature of the system and one that is not heavily advertised in other models. The cylindrical, aluminum designed device has a one of a kind shape and look compared to other wall-mountable models. It measures temperature, humidity, barometric pressure, indoor carbon dioxide concentration, and unlike other models, also houses a sound meter. The Netamo weather station for Smartphone has its own app that can be installed with IPhone IOS, android 4.0 or later, and Windows. You can access your data anytime from any location, and purchase includes a lifetime free personal account for your data from all of your weather “stations”.
Since this particular Air Quality Monitor claims to be a weather station, its software display appears as if you just logged into your Apple weather app, which users seem to like and find easy to use. You can even become part of the Netamo community online and be part of its “weather map”, showing user information from around the globe.
For those looking for more specific information on allergens due to particle matter, this may not be the device for you. But, if you are looking to keep up with other aspects of air quality within your home, you may appreciate this model more since it also monitors barometric pressure.
Pros: Suitable for outdoor use and monitoring garden environments, Ability to add modules and synthesize data in one app, Measures temperature, humidity, barometric pressure, indoor carbon dioxide concentration, and sound
Cons: does not measure VOCs, small particle matter, or carbon monoxide
Canary All-In-One Home Security Device (Keeping an Eye While you’re Away)
With the claim of a home security system in addition to air quality monitoring, the Canary All-In-One Home Security Device serves as a serious contender on our list even though not at the very top. The Canary device comes with a device, AC power adapter, micro-USB cable, secure setup cable, and a Quick Start Guide along with the promise of easy installation that “sets up in seconds”.
Like the other models referenced above, the Canary monitor has smart technology that can link to your phone or other mobile device. The Canary device offers the ability of being a home security device with the ability to stream real time video of your home, claiming a 1080 p HD camera, motion detector, night vision, and audio. The Canary also offers data storage where you can review recorded video and audio events for up to 30 days after recorded time. The canary software will send alarms to your mobile device if something appears amiss. However, this is a double edge sword since many customers complain that the device may be too sensitive and often sends alerts due to pet movements or normal day to day activity in the home. However, company representatives and other reviewers have commented on how much better the Canary software has become in the last year through continuous improvement through software updates.
Unlike the NEST, Canary does not claim to monitor Carbon Monoxide. The only factors showing on the Canary website under the “HomeHealth Technology” Category included temperature, humidity and air quality. Customer reviewers claim that the device notifies them when it is time to change their air filter. While the Canary may be extremely innovative in providing a low cost option for home security, we are not sure what particles the monitor is measuring for it to be considered a true air quality monitor.
The Canary All-In-One Home Security Device in Silver is one of our favorites.
Pros: easy installation, detects temperature, humidity as well, has the addition of a camera that provides an economical solution for home security
Cons: Measurement is unspecified, carbon monoxide not explicitly measured
Dylos DC1100 Pro
The Dylos DC1100 Pro is a step up from the Dylos DC1100. Please note that this machine is a small particle counter only. Unlike other models listed here, it will not detect humidity, CO2 or N02 levels, temperature or other factors. However, like the Foobot described below, this model detects small particles, but takes this a step further by categorizing them into both small and large particles. The smaller size range can detect mold and bacteria while the larger setting can detect things like pollen and other allergens. The model utilizes and LCD screen that displays a bar graph showing count readings for both sizes. It does not appear to have any software that would link to a smartphone or other mobile device.
Pros: Most detailed readings for particle counting
Cons: Does not measure anything else but small particles; cost is relatively high compared to competition
The Foobot Indoor Air Quality Monitor (Alternate Device for Monitoring VOCs)
The Footbot Indoor Air Quality Monitor is another heavily reviewed product marketed for home use that claims to monitor small particles and VOCs besides our top pick, and we wanted to give you an alternative. VOCs include benzene and are known to cause certain types of cancers. Foobot uses standards set by the World Health Organization and alerts users when certain thresholds are passed for Carbon Dioxide, Carbon Monoxide, Total VOC level, and fine airborne particles (0.03 pm to 2.5 pm) in addition to monitoring temperature and humidity throughout the home.
It made our list because it is unique in its class. Therefore, while it has its glitches which we will describe, does have its place in the world, especially for those who are looking to get a more specific reading on what particular issues the air quality in their home may be facing. Founder Jacques Toillon originally started the company when his son began to have incessant asthma attacks, and he wanted a way for every family to take charge of the air quality in their own home. We think this is an ideal pick for households that have special needs, perhaps have a family member who is chronically ill or immunocompromised, or have other need such as chronic emphysema, chronic obstructive pulmonary disease (COPD), bronchitis, or are undergoing chemotherapy. The founders of the Footbot Company also boast that it stands out above the competition because it can predict user patterns and alert users before they are exposed to pollution in their home.
The Footbot software can be integrated with android or iPhone software and provides a real-time dashboard which can be viewed over your phone or mobile device. However, the biggest complaints are mostly around the software and the product’s ability to connect to the mobile device. It is clear that glitches in the hardware and software have yet to be worked out; it seems the app on both Android and IPhone shuts down frequently for users. We hope that the company keeps making improvements to this device! It’s always nice to see a startup with noble intentions reach the top of the market.
Pros: Detects carbon monoxide, carbon dioxide, and VOCs, detects fine air born particles, measures temperature and humidity, highly rated from allergy community
Cons: Major hardware and software glitches
Air Quality Egg v2, CO/NO2 (For the Environmentalist)
The second version of the Air Quality Egg detects relevant levels of carbon dioxide and nitrous oxide. Carbon dioxide and nitrous oxide are two of the main “greenhouse gases” that are tied to global warming. Not many models reviewed advertised the ability to detect nitrous oxide. It is highly functional and nice in size. It also appears to install fairly easily.
Pros: Detects carbon dioxide and nitrous oxide
Cons: does not detect anything else, pricier than other models that include more comprehensive metrics for testing air quality, rating based on only two customer reviews
Withings Inspire Health Home Video & Air Quality Monitor
The Withings Air Quality Monitor is an alternative model to the Canary All in One model featured earlier; it is one that also has a video security component within along with the air quality feature. The product features secure HD video, enhanced two-way audio, a 135 degree wide angle lens, night vision with twelve times zoom, and a nightlight, in addition to “advanced environmental sensitivity” within an air quality monitor component. Founders of the Withings company envisioned a device that would monitor “both the invisible and the visible” for families around the world.
The two-way audio portion is a unique feature from the Canary model and may be of particular importance to some families who are very interested in the home security portion of the device. The two-way audio is conveniently accessible from your mobile device and is actually cited as a deficiency on several Canary reviews.
With so many capabilities within one device, many families utilize it as a baby monitor, and there is even a “baby monitor mode” for the device where you can control lighting and sound sequences that promise to soothe and lull your little one to sleep. The device is cylindrical in shape, has an aesthetically pleasing wood exterior that would blend in with most décor, but is obviously not flat like other models due to the camera functionality. With the Withings model, you have the ability to watch, listen and control the camera feature from your IOS device (iPhone, IPad, Apple Watch, and Apple TV) or Android phone. There does not seem to be a website available for the product at the moment, so one would absolutely have to have one of these devices in order to view the dashboard.
Withings company founders boast that it is the first camera security system that can be streamed to AppleTV. The website claims that within the first few days of installation, the home system will be able to learn patterns of lighting, noise, and background sounds so that it can provide users an alert if something is off, such as someone entering your home or an object collapses. The ‘Home’ app allows you to view live HD streaming from the device to you your connected phone, tablet, Apple TV, etc., to view the last few hours via a timeline of events, the last 48 hours via time-lapse animations, and up to the last 30 days. The Withings website advertises a cloud storage program.
While the Withings model has the exciting capability of providing a home security system as well, the air quality monitor features leave much to be desired. The only thing the system measures in terms of air quality appear to be levels of VOCs, which are only vaguely identified as being high, low, or normal. The device measures no other characteristics about the air – temperature, humidity, etc, that other models within this piece seem to measure. The air quality component is more of an afterthought here, with the security piece being at the forefront of its marketing.
There are several downsides to the Withings model keeping it toward the bottom of our list. Based off many customer reviews, there are several complaints regarding picture and sound quality. While Withings claims HD, 1080P picture quality, one reviewer claims that it seems to be closer to 720P. Even on wireless internet connections, the picture quality still can sometimes appear pixilated and or blurry. There are also several complaints about the two way audio features claiming that there is no way to adjust volume or control audio feedback. There are also several questions on what the VOC monitor actually monitors as it seems to lack consistency and specificity. Many reviewers simply say it’s just not ready for the market. Company feedback claims that many of these issues will be addressed with software updates. Therefore, we keep the device on our list, but nowhere near the top.
Pros: Innovative home security system, monitors VOCs
Cons: several technical glitches, needs overall functionality improvement for home security component, does not monitor many air quality characteristics
Supco IAQ50 Wall Mounted Monitor – the No Frills Model
Buyer beware…this model is a throwback from the old school. It is not pretty, and will not compliment your home décor at all or link to any of your devices. The Supco IAQ50 Wall Mounted Indoor Air Quality Monitor can be mounted to the wall or simply placed on your desk and will display shorter and long term levels of carbon dioxide, temperature, and humidity. It beeps when any of these levels are too high or two low, and the beeping can be manually turned on or off. There is basically no installation required, and the model seems to be quite accurate based on customer reviews.
Pros: Detects carbon dioxide, humidity and temperature, easy to install and use, sensitive to components it is supposed to detect
Cons: limited functionality does not connect to any other mobil devices or sync data
One thing this process did teach us was that no two air quality monitors are created alike, and all of the models today seemed to be for different markets. Remember when choosing the best air quality monitor, start first with what your needs are. For instance, if you are looking to detect air particles in your home because of allergies, it would not be ideal to pick something more basic like the NEST model. However, if you are on a budget and simply want to make sure that your air is clear of carbon monoxide, the NEST is a safe option. The Air Mentor PRO is a model that is at the top of our list because of its all inclusivity, with the Awair model as a close second. Other models listed will offer you additional luxuries such as the bonus of a camera and home security system but may lack on the actual air quality detection front. Some of the more basic models simply offer particle detection alone like the Dylos. Remember that you must cater to your own needs when choosing these models. Most of them are in a similar price range (aside from the NEST), so it really just depends on your specifications. Several of these models are manufactured by startups still early in their development, so we are excited to see what improvements and upgrades these companies make as they mature.