Rabbit Air BioGS SPA-421a Air Purifier Review

The Rabbit Air BioGS SPA-421a, once popular for its effectiveness in purifying indoor air, is no longer in production.

I recommend considering the improved model Rabbit Air BioGS 2.0 SPA-550A Air Purifier as a worthy replacement.

It has gained a reputation for exceptional performance and advanced features.

For a comprehensive review of the Rabbit Air BioGS SPA-421a Air Purifier.

In summary, the Rabbit Air BioGS 2.0 SPA-550A Air Purifier is an excellent choice to replace the discontinued Rabbit Air BioGS SPA-421a.

Now Discontinued – Review of the Rabbit Air BioGS SPA-421a

Like its more powerful and higher-priced cousin the Rabbit Air BioGS SPA-582a, Rabbit Air’s SPA-421a air purifier does a superb job of keeping your interior environment clear of common pollutants. To do that well is the minimum, of course. But the Rabbit Air BioGS SPA-421a goes far beyond that.

Appearance – More Than Just Aesthetics

I like the look of the SPA-582a and the Rabbit Air SPA-421a is very much the same. That look is more than just aesthetics, though – it’s functional.

At 18″ wide x 9″ deep and 22.5″ high you won’t have trouble finding a good place to put it. You’re not limited to corners. At 17 lbs, it isn’t hard to move if you’re not happy, but it’s heavy enough to be stable.

This unit also includes an unusually high number of helpful indicator lights and icons that show you exactly what’s going on at every moment.

It shows you pollutant levels visually. There are lights to show you the mode of operation (from Silent to Turbo), when filters need to be cleaned and changed, and many more. Many can be judged from across the room.

Noise Level – 5 Ultra Quiet Fan Speeds!

The Rabbit Air BioGS SPA-421a does its pollutant-clearing job with very little noise, particularly compared to many other very popular (and otherwise very good) air purifiers on the market. Here are the numbers with the corresponding cfm (cubic feet per minute) values:

Silent = 18.4 dB (pushing 39 cfm)
Low = 25.9 dB(pushing 60 cfm)
Medium = 34.2 dB (pushing 95 cfm)
High = 39.9 dB (pushing 139 cfm)
Turbo = 45 dB (pushing 159 cfm)

Those are very good numbers, even on the higher speeds. Further, the Turbo only comes on (or is manually started) for those brief and occasional periods when some pollutant is abundant and has to be cleared fast. That could be a big load of pollen that wafted in from outdoors, or a thick plume of nearby cigarette smoke, or any of a half-dozen things. Those things, we hope, don’t flood your home all day every day.

Performance – 4 Stage Purification – Energy Efficient

Ok the SPA-421a looks great. But does it work? In a word: Oh, yes! (Ok, I needed two words to emphasize the point. )

Five intake vents on the front take in bad air, while the pure air is pumped out the back in an upward direction.

That means the Rabbit Air BioGS SPA-421a won’t be blowing dust off the floor into the air but sucking it up instead.

And, using only 7 watts on low, 33 watts on high you won’t see a noticeable increase in your electricity bill. That’s less than running a 40-watt bulb all day long, i.e. practically nothing.

It is a bit weaker than some, in that it clears 600 square feet (a respectable figure), but rated at only 2 air changes per hour (ACH). Four is generally preferred and six is stellar. However, all that means is that it works a little more slowly, not any less completely.

For smaller rooms, say 200 square feet (still pretty decent; that’s a shade over 14 feet by 14 feet), it will do six air changes per hour with no problem. That makes this model a very good choice for the bedroom, the home office, or just about anywhere but the living room in a large house.

The CADR figures are lower than the truly high end models, but that’s what you would expect from a mid-range model. That is 163 for pollen, 145 for dust and 144 for smoke.

Despite the ultra-quiet operation you can rest assured the Rabbit Air 421a is definitely doing the job. There are several ways you can know that. One is by reading up on the 4-stage filter system.

The filtration first step uses a permanent, silver-coated nano-particle pre-filter. Many pre-filters are simple thin cotton. Others contain carbon. This style is a cut above. This new technology coats the fibers with tiny particles of silver, which creates a highly adsorbent surface. That’s a fancy way of saying things stick to it very well. Silver also acts as a germicide, a rare quality in a pre-filter. As an added benefit, it’s also very easy to clean and never needs replacement.

Stage two uses what are admittedly standard HEPA filters. However, the standard for HEPA filters today is so high – 99.97% of allergens and contaminants down to 0.3 microns – that even the ‘ordinary’ sort included in virtually every home air purifier does a great job.

The third stage uses a washable honeycomb activated charcoal odor filter. This does a fine job of adsorbing a wide range of odors and chemicals in the air. If you have air that sometimes gets contaminated with auto exhaust (such as homes that are near heavily trafficked roads), or VOCs (Volatile Organic Compounds), cat litter, and others, the carbon filter will be very appreciated.

Finally, in step four the unit generates and sends out negative ions to make airborne particles heavy so they tend to fall to the floor where they can be sucked in by the purifier or a vacuum cleaner.

Maintenance

As soon as the filter cleaning indicator light is illuminated (or sooner depending on the air quality of the room) filters need to be cleaned. You can clean the filters by running the brush attachment of your vacuum cleaner along the filters. The pre-filter and activated carbon filter are also washable.

The HEPA filter type included in the Rabbit Air SPA-421a is not the Lifetime variety. It does require replacement. However, at a scheduled life-cycle of 18 months that’s pretty good. Many will last as long as 3 years if the purifier runs only 12 hours per day.

The activated carbon filter needs to be replaced once every 3 years.

Does it include a Warranty?

A 5-year warranty on workmanship and materials gives you good reason to relax. If RabbitAir sold many lemons, they couldn’t afford such a generous policy.

Conclusion

The Rabbit Air BioGS SPA-421a air purifier is a high-quality air purifier that definitely creates a cleaner environment. Ideal for home or small office use, it’s silent, low-maintenance, and as easy on the eyes as your new air will be on you.

It automatically regulates its speed to respond to pollutant levels as and how they occur in the real-world. It has numerous indicators to let you know what’s going on as it does that. It even comes with a remote control to let you adjust many of those functions without getting up.

It offers very respectable numbers to back up the comments of praise real-world users heap on this model.

Rabbit Air BioGS SPA-421A Review

The Rabbit Air BioGS SPA-421A is one of the quiet models from Rabbit Air and is designed for use in living areas or offices that are as large as 600 sq.ft. There are other models from the manufacturer in the same series of products that are meant for larger areas and all of them have the same basic features. The machines differ in the noise they make and the type of dust or other airborne particulate matter that they are capable of trapping. However, they are all very effective in doing their job and that makes this line of machines among the best in the market.

For its purification process, there is a HEPA filter, which forms the core of the process. It is built based on various biofibers that make it very efficient and capable of killing most of the germs and bacteria that live in the air in the room. A test was done to check the state of the room before and after the machine was turned on and there were impressive results. This HEPA filter is supported by several pre-filters that work to remove the dust and other large particulate matter, so you can keep the room clean and avoid breathing in things that might irritate the nose or lungs. These pre-filters can be maintained with ease and even the HEPA filter can just be cleaned or vacuumed normally.

The BioGS SPA-421A is one of the most energy efficient machines in the market today. It consumes among the lowest power possible for cleaning an area of the size it is rated for and it even does the job with ease. There are no stutters or jerks as the machine continues to clean and it can handle any amount of dust thanks to the speed control of its fan. At the turbo mode, this machine requires a mere 33W of power. This is less than most of the large lights at home and the best part is that the machine doesn’t need to be run in the turbo mode for very long either. There is an automatic sensor control that can adjust the speed of the fan in the air purifier based on the requirement according to the quality of the air that is constantly monitored.

This air purifier comes with a remote that adds to the convenience. While it is easy enough to let the automatic control take over, it is good to have a remote and the freedom to make adjustments from across the room. The machine is capable of filtering the air twice every hour in a large room and if you think that is a lot, you can adjust it conveniently. Moreover, it is also very light and hence can be moved around with utmost ease.

The Rabbit Air SPA-421A is well worth every penny that it costs. Thanks to the low maintenance costs and carefully engineered features, this machine is the best when it comes to efficiently cleaning the air. The set of filters is easy to maintain and it keeps the air healthy should you have any problems with allergies and pollutants. Moreover, the manufacturer’s warranty is assuring enough of this machine’s performance.

Pros

Low maintenance costs
Easy to replace and maintain the filters
Automatic control of fan speed

Cons

A little expensive

Rabbit Air BioGS 421A Purifier Review and Test Results

The Rabbit Air Purifier line has several models but we’ll start our review with their most popular, and affordably priced BioGS 421A. The Rabbit Air Air purifiers all have a good range of filters including HEPA. It was designed by Mitsubishi and my only complaint about design is the fact that the unit shakes or vibrates slightly when the fan speed is on high.

Rated for 600 sq. ft. their suggestion for allergy sufferers is 300 sq. ft. That’s because you want to completely clean all the air in a room several times an hour for effective allergen removal. Let’s look closer at some of what’s inside this purifier.

4 Stages of Filters Reviewed

The Rabbit Air Purifier 421A model has a 4-stage filtration system with a few added technologies for germs and viruses:

Stage one is a washable pre-filter that has nanotechnology silver coated onto it. This silver coating has some anti – bacterial properties.

Stage two is the HEPA filter with which has an added treatment to reduce germs. This won’t do as thorough a job on germs as Ultraviolet light so much as it will keep germs from growing on the HEPA filter itself.

(Note: Whether these treatments have an effect greater than Ultraviolet light, or UV and Titanium Dioxide is in question. We plan on doing some tests at the University here to try and determine the effectiveness.)

Rabbit suggests changing the filters every 18 months (if run 12 hours a day) however I don’t find that filters will last more than 9-12 months.

Stage 3 is a nice activated carbon filter to trap gases and odors. It can be washed several times, but I would be wary of doing so because charcoal absorbs water and mildew may develop. Make sure you dry it out completely and hit it with a hair dryer to make sure.

Stage 4 is negative ions – which are both good for your health and can go out into the room to purify the air, kill mold, and can eliminate some odors.

Pros and Cons

Pros

1 – 4 Stage Technology

2 – HEPA for allergies

3 – Brushless Motor (quiet)

4 – 600 SQ. Ft.

Cons

1 – A bit pricey

2 – Expensive replacement filters

3 – Does Not include UV

Specifications and Technologies

Rabbit Air Purifier Model BioGS 421A

Purification Technologies: 4

Square Footage: 600 SQ. Ft.

Yearly Running Costs: £91

Decibel Level: low/high = 18//45 (Good for sleep mode)

Pros – Good for Allergies, Dust, Odor, gases

Cons – Not great at viruses and germs (no UV), Expensive filters

Warranty – 5 years on parts and labour only if comply with 18 month filter changes, 90 days money-back guarantee returned in “like-new” condition

Number of Speeds – 5

Filters – HEPA, Carbon, Pre-Filter

Rabbit Air Purifier Compared

Air Purifier Rating

1. Technologies Included: (out of of 10 technologies) = 5

2. Particle Removal (Allergens, Dust) = 9

3. Immune System Threats (Germs, Virus, etc.) = 6

4. Gas Removal (Odor, Chemicals, Smoke) = 8

5. Longevity/Quality = 9

6. Noise Levels = 10

7. Ease of Use = 7

8. Warranty = 6

9. Customer Service/Reputation (reviews) = 7

10. Price Value = 9

Score: 76 = Very Good

Rabbit Air Purifier Conclusion

The Rabbit Air Purifier is one of the better units on the markets, with a wide range of filters and technologies for helping allergies, odors, and other air problems. I would have liked a bit more germ and virus protection (like UV) other than the nano-silver and HEPA treatment but at least they thought of it. My other concern is the expensive replacement HEPA and Carbon.

For general house cleaning and allergies I would recommend it.

RabbitAir Company Info

RabbitAir entered the air purifier industry in 2004 and is based in Los Angeles, California. The company focuses on high quality HEPA based purifiers and also offers a product in partnership with Mitsubishi Heavy Industries.

Unique Air Purifier Approach

RabbitAir indoor air quality products are the only purifiers designed to either to be mounted on a floor stand that is included with the unit or they can be hung on the wall using a wall bracket. The inlet valve draws the indoor air through a series of five filters from 360° around the front panel. The outlet valve is located on the back of the unit where clean air is expelled upward into the room.

Coverage Area and Noise Levels

Coverage area for normal residential use ranges from 700 square feet to 815 square feet, with a smaller radius for allergy sufferers of 300 to 408 square feet. Noise levels have been measured between 25.6 decibels on low speed to 51.3 decibels on maximum speed. The Brushless Direct Current Motor offers 5 different settings.

Criticisms of RabbitAir include the fact that the warranty is dependent on regular filter changes and that the carbon filter is too lightweight to remove odors from large areas. Overall, customer reviews are favorable, usually giving it a rating of 8 out of 10. RabbitAir products are considered the most decorative indoor air quality units available.

Rabbit Air Air Purifier Models

RabbitAir offers 4 models of indoor air room purifiers:

MinusA2 SPA-780A Ultra Quiet HEPA Air Purifier – Covers 815 square feet, power consumption from 8 to 58 watts, choice of black or white

MinusA2 SPA-700A Ultra Quiet HEPA Air Purifier -Covers 700 square feet, No color choices – white only

BioGS series is available in a choice of colors including chrome silver, pearl white, lime green and metallic blue. All the units in this series emit zero ozone,making it safe for asthma and allergy sufferers.

SPA-582A Ultra Quiet HEPA Air Purifier – covers 780 square feet or 390 square feet for allergy sufferers, uses 7 to 65 watts of power depending upon the power setting

BioGS SPA-421A Ultra Quiet HEPA Air Purifier – covers 600 square feet or 300 square fee0t for allergy sufferers, uses 7 to 33 watts of power depending upon the power setting

BioGS SPA-421A BCRF Special Edition Air Purifier – covers 600 square feet with a 300 square foot radius for allergy sufferers, uses 7 to 33 watts of power depending upon the power setting, available only in white, a portion of the proceeds from the sale of this unit will be donated to breast cancer research.

Rabbit Air air purifier review: Summaries and Detailed Reviews.

Reviews are only as good as the underlying rating criteria used.

After you are done reviewing, STEP 5 Buying lists the best places to buy RabbitAir purifiers.

Rabbit Air Purifier Summaries

Model: Minus A2 AP-1004 – Good Rating

Up to 200 sqft (6 AC/hr)

MSRP 799/459.95 at time of review

Conclusion: Excellent quality, average cleaning purifier.

Detailed Review Below

Model: BioGS SPA-582A – Good Rating

Up to 260 sqft (6 AC/hr)

MSRP 599.95/399.95 at time of review

Conclusion: Another excellent quality, average cleaning purifier.

Detailed Review Below

Model: BioGS SPA-421A – Good Rating

Up to 200 sqft (6 AC/hr)

MMSRP 549.95/329.95 at time of review

Conclusion: Another excellent quality, average cleaning purifier.

Detailed Review Below

RabbitAir Purifier Detailed Reviews

Model: Minus A2 AP-1004

Rating Score: 59/100 points

Summary

The Rabbit Air Minus A2 AP-1004 combines passive filtration with active negative ionization. This model has 6 stages including a custom filter with three choices: Toxin Adsorber,

Germ Defense, or Pet Allergy. RabbitAir uses all of its electronic expertise on this purifier with sensors and electronic control features. Some features may be useful and others just extra

gadgets. The materials and quality are high just like many of Mitsubishi's products (a partner or Rabbit Air). The main cleaning focus for this purifier is particle removal. Expect less

cleaning for odors and gases, VOCs, and microorganisms. This unit utilizes relatively long-life filters. Because of initial cost vs. actual square footage cleaned, this unit rates as an overall

poor value.

Basic Specifications:

Designed for spaces up to 200 sqft (6 air changes per hour)
Passive and Active purification technology
Step 1: nano-silver pre-filter for larger particles/micro-organisms
Step 2: medium filter for medium sized particles
Step 3: 99.97% True HEPA filter w/ anti-bacterial control for particle removal
Step 4: Custom filter: Toxin or Germ or Pet
Step 5: Charcoal Based Activated Carbon Filter – Odors, VOCs, and chemicals
Step 6: Negative Ions – effectiveness varies for particles
Yearly Operating Costs 186.48
5-year warranty parts and labor

Rating Factors:

1) Value: 8/24 points – The MSRP is 799/459 at time of review. The estimated square footage cleaned is 200 sqft. The Value equation is as follows: 100 * (1 – (((459 initial +

186.48/year)/200 sqft)/7 removal points)) = 53.89. 53.89 = 8 points – poor value.

2) What is Removed: 7/16 points – Removal of Larger Particles >0.3 microns – Good Removal, 2-points. Removal of Smaller Particles <0.3 microns – Good Removal, 2-points. Removal of

Odors and Gases – Fair Removal, 1-point, Removal of VOCs – Fair Removal, 1-point, Removal of Basic Microorganisms – Fair Removal, 1-point, Removal of Advanced Microorganisms – Poor Removal,

0-points.

3) Yearly Operating Costs: 6/15 points – Annual filter replacement cost is 75-150 depending on usage levels. Their marketing information says that the filters will last up to two years and

their manual states change every year. I will say 1 year for best performance. Calculating electricity usage: 47 watts/1000 x .0886/kwh x 24 hours/day x 365 days/year = 36.48/year. Total cost

186.48/year. Above Average to operate.

4) Quality: 11/12 points – This unit was developed within RabbitAir in conjunction with Mitsubishi. Quality is high. Fit, Finish, and Workmanship – Excellent Quality, 5-points. Cleaning

Technologies – Very Good Quality, 4-points. Support Material – Excellent Quality, 2-point.

5) Warranty: 8/8 points – RabbitAir air purifiers are guaranteed against all defects in workmanship and materials for 5 years. Excellent Warranty.

6) Maintenance and Cleaning: 5/6 points – Routine maintenance includes replacing the Medium filter, HEPA filter, Custom filter, and Charcoal Filter every 12 months or as needed. Lots of

filters here, but fairly easy with a good design and pictorial manual. Easy Maintenance, 3-points. Cleaning includes washing the pre filter every month and monitoring the other filters. You

will also want to clean the particle sensor, the air intake and outlet, negative ion generator, and wipe down the outside of the unit. This should be done every 3-6 months and should take you

15-30 minutes. Average Cleaning 2-points.

7) Look and Feel: 5/6 points – A good modern looking unit available in white. It is can be a stand alone or mounted on a wall. Looks Good, 2-points. Controls are on the front where they are

fairly easy to adjust and view. The remote is helpful. Weighs 19.4 lbs and measures 21.4" W X 20" H X 7" D. Feels Great, 3-points.

8) Years in Business: 3/5 points – Rabbit Air has been in business since 2001. They are located in Los Angeles, CA.

9) Noise Level: 4/5 points – This unit has 5 fan speeds. Speed 1 – 20.8 dB, Speed 2 – 24.6 dB, Speed 3 – 31.3 dB, Speed 4 – 39.2 dB, and Speed 5 – 45.6 dB. Quiet Noise Level.

10) Set-Up: 2/3 points – A quality unit with fairly easy setup. The filters in the unit are installed, but they are in plastic bags. Some time will be spent on taking them out and

re-installing them. You will become familiar with the machine. Average Set-up.

total = 59/100 points

Conclusion

Excellent quality, average cleaning purifierReturn to Top Model: BioGS SPA-582A Last Reviewed: 05-29-2008 Rating Score: 60/100 points

Summary

The Rabbit Air BioGS SPA-582A combines passive filtration with active negative ionization. This model has 4 stages. It has a slightly more powerful fan then the BioGS SPA-421A.

RabbitAir uses all of its electronic expertise on this purifier with sensors and electronic control features. Some features may be useful and others just extra gadgets. The materials and

quality are high just like many of Mitsubishi's products (a partner or Rabbit Air). The main cleaning focus for this purifier is particle removal. Expect less cleaning for odors and gases,

VOCs, and microorganisms. This unit utilizes relatively long-life filters. Because of initial cost vs. actual square footage cleaned, this unit rates as an overall poor value.

Basic Specifications:

Designed for spaces up to 260 sqft (6 air changes per hour)
Passive and Active purification technology
Step 1: nano-silver pre-filter for larger particles/micro-organisms
Step 2: 99.97% True HEPA filter w/ anti-bacterial control for particle removal
Step 3: Washable Honeycomb Activated Carbon Filter – Odors, VOCs, and chemicals
Step 4: Negative Ions – effectiveness varies for particles
Air Quality Sensor for odors and dust
Colors: chrome silver, pearl white, lime green, and metallic blue
Yearly Operating Costs 105.83
5-year warranty parts and labor

Rating Factors:

1) Value: 8/24 points – The MSRP is 599.95/399.95 at time of review. The estimated square footage cleaned is 260 sqft. The Value equation is as follows: 100 * (1 – (((399.95 initial +

105.83/year)/260 sqft)/6 removal points)) = 67.58. 67.58 = 8 points – poor value.

2) What is Removed: 6/16 points – Removal of Larger Particles >0.3 microns – Good Removal, 2-points. Removal of Smaller Particles <0.3 microns – Fair Removal, 1-point. Removal of Odors

and Gases – Fair Removal, 1-point, Removal of VOCs – Fair Removal, 1-point, Removal of Basic Microorganisms – Fair Removal, 1-point, Removal of Advanced Microorganisms – Poor Removal,

0-points.

3) Yearly Operating Costs: 9/15 points – Annual filter replacement cost is 40-55 depending on usage levels. Again, their marketing information says that the filters will last longer than

their manual. I'll stick with the higher cost estimate. Calculating electricity usage: 67 watts/1000 x .0886/kwh x 24 hours/day x 365 days/year = 50.83/year. Total cost 105.83/year.

Average to operate.

4) Quality: 11/12 points – This unit was developed within RabbitAir in conjunction with Mitsubishi. Quality is high. Fit, Finish, and Workmanship – Excellent Quality, 5-points. Cleaning

Technologies – Very Good Quality, 4-points. Support Material – Excellent Quality, 2-point.

5) Warranty: 8/8 points – RabbitAir air purifiers are guaranteed against all defects in workmanship and materials for 5 years. Excellent Warranty.

6) Maintenance and Cleaning: 5/6 points – Routine maintenance includes replacing the HEPA filter every 12 months or as needed and the washable carbon filter every 2-3 years or as needed.

Easy Maintenance, 3-points. Cleaning includes washing the pre filter every month and the carbon filter as needed. You will also want to clean the particle sensor, the air intake and outlet,

negative ion generator, and wipe down the outside of the unit. This should be done every 3-6 months and should take you 15-30 minutes. Average Cleaning 2-points.

7) Look and Feel: 5/6 points – A good modern looking unit available in chrome silver, pearl white, lime green, and metallic blue. It is a stand alone unit. Looks Good, 2-points. Controls are

on the front where they are fairly easy to adjust and view. A colorful display. The remote is helpful. Weighs 17 lbs and measures 18" W X 22.5" H X 9" D. Feels Great,

3-points.

8) Years in Business: 3/5 points – Rabbit Air has been in business since 2001. They are located in Los Angeles, CA.

9) Noise Level: 3/5 points – This unit has 5 fan speeds. Speed 1 – 19.1 dB, Speed 2 – 30.6 dB, Speed 3 – 39.7 dB, Speed 4 – 44.8 dB, and Speed 5 – 49.1 dB. Average Noise Level.

10) Set-Up: 2/3 points – A quality unit with fairly easy setup. The filters in the unit are installed, but they are in plastic bags. Some time will be spent on taking them out and

re-installing them. You will become familiar with the machine. Average Set-up.

total = 60/100 points

Conclusion

Another excellent quality, average cleaning purifier.

Model: BioGS SPA-421A

Rating Score: 64/100 points

Summary

The Rabbit Air BioGS SPA-421A combines passive filtration with active negative ionization. This model has 4 stages. It has a slightly less powerful fan then the BioGS SPA-582A.

RabbitAir uses all of its electronic expertise on this purifier with sensors and electronic control features. Some features may be useful and others just extra gadgets. The materials and

quality are high just like many of Mitsubishi's products (a partner or Rabbit Air). The main cleaning focus for this purifier is particle removal. Expect less cleaning for odors and gases,

VOCs, and microorganisms. This unit utilizes relatively long-life filters. Because of initial cost vs. actual square footage cleaned, this unit rates as an overall poor value.

Basic Specifications:

Designed for spaces up to 200 sqft (6 air changes per hour)
Passive and Active purification technology
Step 1: nano-silver pre-filter for larger particles/micro-organisms
Step 2: 99.97% True HEPA filter w/ anti-bacterial control for particle removal
Step 3: Washable Honeycomb Activated Carbon Filter – Odors, VOCs, and chemicals
Step 4: Negative Ions – effectiveness varies for particles
Air Quality Sensor for odors and dust
Colors: chrome silver, pearl white, lime green, and metallic blue
Yearly Operating Costs 80.61
5-year warranty parts and labor

Rating Factors:

1) Value: 8/24 points – The MSRP is 549.95/329.95 at time of review. The estimated square footage cleaned is 200 sqft. The Value equation is as follows: 100 * (1 – (((329.95 initial +

80.61/year)/200 sqft)/6 removal points)) = 65.79. 65.79 = 8 points – poor value.

2) What is Removed: 6/16 points – Removal of Larger Particles >0.3 microns – Good Removal, 2-points. Removal of Smaller Particles <0.3 microns – Fair Removal, 1-point. Removal of Odors

and Gases – Fair Removal, 1-point, Removal of VOCs – Fair Removal, 1-point, Removal of Basic Microorganisms – Fair Removal, 1-point, Removal of Advanced Microorganisms – Poor Removal,

0-points.

3) Yearly Operating Costs: 12/15 points – Annual filter replacement cost is 40-55 depending on usage levels. Again, their marketing information says that the filters will last longer than

their manual. I'll stick with the higher cost estimate. Calculating electricity usage: 33 watts/1000 x .0886/kwh x 24 hours/day x 365 days/year = 25.61/year. Total cost 80.61/year.

Inexpensive to operate.