Honeywell Enviracaire SilentComfort, Ultra Quiet HEPA Air Cleaner, Model 18150
Honeywell, Inc.

#1 Choice of Physicians*
Recommended Room Size at 6 Air Changes Per Hour:Medium - Large 11` x 17`
No Draft™ Airflow Technology - Effectively and quietly cleans the air without a cool exhaust draft.  Ideal For Bedrooms. Thank you for your interest in purchasing Honeywell Enviracaire SilentComfort, Ultra Quiet HEPA Air Cleaner, Model 18150.
True HEPA Filtration helps reduce common household allergens, including:

  • Pollen
  • Household Dust
  • Tobacco Smoke Particles
  • Cat Dander
  • Mold Spores
Advanced Technology
Why is the SilentComfort™ HEPA air cleaner so quiet?At Honeywell, we know that quiet is important.  That`s why we`ve designed the SilentComfort™ HEPA air cleaner using advanced No-Draft™ airflow technology and other sound-reducing features.  We want you to use the higher speeds of your air cleaner without the noise or airflow disturbances created by many other air cleaners.  On higher speeds, air cleaners provide more filtered air into the room, imprioving air quality more quickly.  By offering comfortable operation with improved performance, the SilentComfort™ HEPA air cleaner is perfect for use in bedrooms and family rooms - places where you spend most of your time.
How quiet is the SilentComfort™ HEPA air cleaner?It`s so quiet that you may think it`s not working!  But don`t worry - it is!  Independent testing shows that the SilentComfort™ HEPA Air Cleaner is quieter than many HEPA and non-HEPA air cleaners of similar performance sold at retail (air cleaner performance based on October 1999 AHAM Room Cleaner Directory, within a 10 CADR range).
What is a HEPA air cleaner?HEPA stands for High Efficiency Particulate Air.  HEPA filters are recognized as one of the most efficient ways known to remove airborne particles.  They are used in medical, laboratory and commercial applications.  HEPA filters are certified 99.97% effective at capturing airborne particles as small as 0.3 microns from the air that passes through the filter**. Honeywell Enviracaire SilentComfort, Ultra Quiet HEPA Air Cleaner, Model 18150 review and product info.
Honeywell enviracare® HEPA Air Cleaners - The #1 Choice of Physicians*In a survey  conducted by Riter Research, Inc., physicians were selected at rendom from the American Academy of Allergy, Asthma and Immunology.  Of physicians surveyed who recommend portable room air cleaners to their patients who suffer from allergies or asthma due to air pollution:
  • 93% of the physicians surveyed consider HEPA filtration to be extremely or very effective.
  • 82% of the physicians surveyed prescribe or recommend Honeywell or enviracare® portable room air cleaners.
Product Specifications and Benefits
Advanced Airflow Design
  • No-Draft™ airflow technology effectively cleans without a cool exhaust draft
  • Utra quiet high-speed operation
  • Patents Pending
True HEPA Filter
  • High Efficiency Particulate Air (HEPA) filter helps capture 99.97% of airborne particles and allergens as small as 0.3 microns from the air that passes through it**
  • SurroundSeal HEPA filter technology helps prevent unfiltered air from leaking around HEPA filter.
  • Large filter area for long filter life and low maintenance
  • Replace every 1 - 3 years, depending on use
Activated Carbon Pre-Filter
  • Helps reduce some common household odors
  • Helps capture large particles, protecting the HEPA filter life
  • Replace at least every 3 months
High Velocity Air Flow
  • Provides Honeywell`s minimum recommendation of 6 air changes per hour in an 11` x 17` room (187 sq. ft.), exceeding AHAM standards
  • Higher air changes per hour may help improve performance in all room sizes
  • AHAM CADR-rated for a 10` x 23` (230 sq. ft.) room
Intelli-Check™ Electronic Filter Change Indicators
  • Monitors pre-filter and HEPA filter usage
  • Indicates time to replace filters
Easy To Use
  • Soft-touch electronic controls with power lights
  • Convenient carrying handle
5-Year Limited Warranty - Note: Replaceable HEPA filter and Carbon Pre-filter are not covered by this warranty
Typical Performance For This Model
Indoor air must be constantly recirculated by an air cleaner in order for it to help reduce concentrations of airborne particulate contamination.  For air cleaners of equivalent filter effectiveness, a higher Air Change per hour (ACH) rating may help improve air quality more quickly.
Room size recommendation:Honeywell`s minimum recommendation of 6 air changes per hour, which exceeds AHAM standards:
   Room Size (8` Ceiling)    Sq. ft.    Air Changes per Hour (ACH)    11` x 17`    187    6
AHAM Suggested Room Size:
   Room Size (8` Ceiling)    Sq. ft.    Air Changes per Hour (ACH)    10` x 23`    230    4.8
AHAM Performance RatingsIn order to assist consumers in comparing room air cleaners, the Association of Home Appliance Manufacturers (AHAM) has developed a standard rating system to measure air cleaner effectiveness, called the Clean Air Delivery System (CADR).  These performance ratings are based on independent laboratory testing.
                              AHAM Certification ProgramCertified Rating - Clean Air Delivery RateDust: 150Tobacco Smoke: 150Pollen: 135
This information is provided to assist consumers in comparing room air cleaners.  These values represent performance that can be expected within the first 72 hours of operation.  Subsequent performance may vary with use.  This air cleaner is suggested for use in a single closed room up to 230 square feet.  Room size ratings assume an 8` ceiling and conform to the AHAM Certification Program criteria of 80% tobacco smoke reduction.  Higher Clean Air Delivery Rates (CADRs) provide improved performance in all room sizes.  Portable air cleaners will be much more effective in rooms where all doors and windows are closed.
Filter ReplacementFilter life depends upon use.  To maintain optimum performance, we recommend replacing the filters:
 Replacement Filters    Replacement Schedule    Model No: Activated Carbon Pre-Filter Every 3 Months-Check Monthly 38002  (8  Replacements) HEPA Filter 1-3 Years depending upon use and conditions. 21500
Proud Supporter of American Lung Association® - Partners in Air Quality Education
Honeywell and the American Lung Association® are partners in the national program to educate the public about the hazards of poor indoor air quality and ways to protect their lung health.  The enclosed information is from the ALA and is part of our educational efforts.
*Riter Research Inc., "Portable Room Air Cleaners Physicians Preference Study", 1998.**Overall particle reduction depends on many factors including the amount of air processed, the pollutant type and the pollutants` introduction rate into the environment.

Truly a great product. I had been having indoor allergies for three weeks since I turned on the A/C once, but it has completely gotten better just from turning this on for a day. It is also very quiet (my A/C is louder.) I`ve read some reviews on the web, and they have all been positive (i.e. fixed allergies problem, quiet), with the exception of expensive energy consumption because it is on all-day. Not a problem for me, because electricity is included with the rent. drugstore.com also has the best price by far on the web, including free shipping.
I bought this "SilentComfort" unit a couple weeks ago to help with allergies. I can`t yet speak to how well it does its job. What I can speak to is the sound level, because I am admittedly a little picky about noise and I chose this one for its advertised quietness, but silent it is not. It is fairly quiet on low, and medium would probably be okay for watching TV (I`m not sure because I have it in the bedroom). High level, while quieter than other units, is still not something I would choose to listen to. I have another, smaller unit that is definitely noisier, so this unit is an improvement in sound level, and the low level is low enough and "steady" enough that I have no trouble sleeping at all. But the description that says "it`s so quiet that you may not be sure it`s even working" is quite laughable.

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