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Airshack.com Frequently Asked Questions (FAQ)

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Air Purifiers and Filters Frequently Asked Questions FAQ


Why use an air purifier?

Hunter air purifiers and air cleaners will help keep your indoor air clean! Did you know that the Environmental Protection Agency (EPA) has found the indoor air quality in some homes to be worse than the air quality in cities known for their poor air quality such as Los Angeles, California and Houston, Texas?

Keeping your indoor air clean with Hunter HEPAtech and QuietFlo Air Purifiers can help protect your family's health. Indoor air pollutants that include: dust mites, mold spores, pollen, animal hair, tobacco smoke, bacteria, pet dander, cleaning products, out-gassing from carpet and urea formaldehyde products, insulation, drapes and plastics, asbestos, and many other allergens and irritants.

Why choose a Hunter HEPAtech air purifier?

The Hunter HEPAtech air purifiers and air cleaners we offer will remove up to 99.97% of airborne particles as they pass through the HEPAtech filter. Hunter HEPAtech filters:
  • Offer Hunter HEPAtech System Performance: Multistage air purification system that quietly outperforms competitive models.
  • Are CADR rated to clean a specific size room. Compare Hunter's air purifiers with each other and competing models using this industry standard rating of relative performance.
  • Remove particles as small as .1 micron. By comparison, a human hair is about 70-100 microns in diameter and a single particle of tobacco smoke is a full 1.0 micron in size.
  • Use the same long-lasting micro-filter material used in hospital respirators, incubators and anesthetic equipment.
All Hunter Air Purifiers feature:
  • Famous Whisper-Quiet Hunter Fan Motor.
  • Easy Change Drop-In Filter Pack.
  • 5 Year Limited Warranty.

What is an ionizer and what is its function on the air purifier?

An ionizer attaches an electrical charge to the air that passes through the air purifier. This charge (typically a negative charge) then attracts positively charged particles that are floating in the air. This "weighs down" the particles so that they sink out of the air. These work best when used with other filtration methods that collect the majority of particles on a disposable filter.

Do all air purifiers have ionizers included?

No. Many air purifiers rely only on a mechanical filter and miss the particles that are not drawn into the unit.

Will air purifiers remove carbon monoxide or radon if present in a room or house?

The typical room air purifier can remove only particles, not gases. Only extremely expensive, industrial type systems can capture these gases effectively.


How will I know that the air purifier is actually cleaning effectively? Will the air smell different?

Often you do not realize how well your air purifier is working until you change the filter and find how filthy it is. Even then, you cannot see the microscopic particles that the filter catches. Some signs that it is working include: Less dust on the furniture, "Clean" smell to the air, especially when using units with an ionizer, and Decreased allergens in your home

Can I program my air purifier to come on/shut off at certain times?

Hunter has two models with an auto shutoff feature. This allows you to set the unit to run for 1, 2, 4, or 8 hours before shutting itself off.

Is a filter included with the air purifier when I initially purchase the unit and how long will a filter last?

All models are shipped with filters. The first filter will typically last from three to six months under continuous use, but it depends upon how "dirty" the environment is and how often the air purifier is used. For example, if your new Hunter unit is a replacement for another unit, then the room is probably cleaner than most. However, if you are putting it in a room that has never had an air purifier, then the first filter will need changing sooner.


Can the filters be manually washed or recycled in any way or do I have to purchase entirely new filters?

Most air purifiers use disposable filters. Hunter units use a combination filter, which is designed to be easily replaced. The top-of-the-line Hunter models have pre-filters to catch the larger particles. This pre-filter can be washed with a hose and used again once it has had time to dry.

How do I know when to replace my filter?

Hunter models come with either a "check filter light" or a "filter chart" to help you understand when to change the filter. The light comes on after 1,000 hours of use, which is the average time for needing to change the filter. The chart is color-coded to give you an indication of how "dirty" the filter is.

How do I select the right size air purifier for my needs?

CADR ratings should be used when selecting your air purifier. These are scores from independent laboratory testing which simulates real world conditions. The higher the score, the better the unit cleans a room. Hunter model CADR scores and room size guidelines are featured with the specific model descriptions.

How is performance or effectiveness rated on air purifiers?

The Clean Air Delivery Rate (CADR) score gives the consumer the best indication of performance. The real world testing which leads to these scores is approved by the Association of Home Appliance Manufacturers (AHAM) and ANSI (American National Standards Institute). The testing has also been recognized by the FTC as the only valid comparison of performance for room air purifiers. The testing involves filling a room with particles and testing how quickly an air purifier will clean the air in the room. There are three tests, using smoke, dust and pollen because each has different properties. Smoke is considered the hardest to clean, and is, therefore, used to establish how large a room a tested unit will clean.

Air Humidifier Frequently Asked Questions FAQ


Why use an air humidifiers?

Proper Humidification Is Important to Your Health
  • Reduces vulnerability to infection by keeping mucous membranes moist and allows cilia (tiny hairs in the nose and throat) to continue working to eject foreign matter caught from the air.
  • Reduces painful static electricity
  • Prevents dry, itchy skin
  • Relieves cold symptoms
  • Relieves chapped lips

Why choose a Hunter air humidifier?

Hunter's Patented Humidifier Design Provides Dual Protection
  • The Regulated Release System eliminates stagnant water standing in the reservoir while inhibiting mineral residue buildup, which can clog the wick and impede performance.
  • Built-in antimicrobial properties to inhibit the growth of bacteria, mold and fungi that may affect the plastic parts and the wick.*
    * Antimicrobial agents in the Care Free Humidifier protect key internal parts only. The antimicrobial protection does not extend to users of this product.
Superior Evaporative Systems
  • PermaWick Models (The Care Free Humidifier Plus) - This unique permanent wick is specially treated to prevent the growth of microorganisms that may affect the wick* and never needs replacement (saves up to $60/year in replacement wick costs).
Other Hunter Humidifier Features
  • Adjustable Humidistat - To maintain desired humidity level
  • Whisper Quiet Hunter Fan - For maximum performance even while you're sleeping
  • Top-Down Water Dispersion - Evenly disperses water from the top over the entire wick to prevent mineral buildup that can impede performance
  • Airtight Tote Away Tank - Balanced for easy transportation
  • Auto Shutoff - For energy savings and peace of mind. Shuts itself off when the tank is empty
  • Automatic Moisture Regulation System - Automatically adjusts output to the moisture in the air
  • Refill Light - Signals that the humidifier needs to be refilled
  • Two Fan Speeds - To adjust the humidity output rate
  • Large Refill Port - To simplify filling
  • 5-Year Limited Motor Warranty - Protects your investment with a motor warranty for the first five years
  • No White Dust - Our units create no white dust. So there's nothing to settle on furniture
*Antimicrobial agents in the Care Free Humidifier Plus protect key internal parts only. The antimicrobial protection does not extend to users of this product.


What is the difference between a cool air humidifier and a warm air humidifier?

The difference comes down to safety. Cool and warm air humidifiers use different methods to produce the mist. Each humidifier type has different associated risks:

Cool air (or evaporative) humidifiers have less risk of causing burns - should someone come in contact with the mist as it exits the unit - because the mist is cool. However, cool air humidifiers have a higher risk of mold and bacterial growth because the water is cold and damp. Because of the risk of mold and bacterial growth, for most cool air humidifiers it is recommended that the water be changed and the unit washed with soap and water daily. Also, because of the way the mist is produced, minerals within tap water are efficiently ejected from the unit with the mist, possibly resulting in health issues, mineral deposits on nearby materials and clogging of the nozzle. Because of this, it is recommended that only distilled water be used in most cold air humidifiers.

Warm air humidifiers have a higher risk of causing burns but a lower risk of mold and bacterial growth or mineral deposition because the water is vaporized within the unit by a heating element. The risk of burns associated with warm air humidifiers (or steam vaporizers) must especially be considered in environments with small children or pets that may be curious about the steam being released from the unit.

Hunter air humidifiers are evaporative (cool air) humidifiers that are specially designed to reduce the risks associated with mold and bacterial growth, mineral deposition and maintenance. They use several patented methods to reduce the maintenance commonly associated with cool air humidifiers, providing the "best of both worlds."

Because of the design of Hunter humidifiers, physicians prefer the Hunter Care Free Humidifier Systems 10 to 1 (in an independent study of physicians conducted 12/96). The Care Free Humidifier and the Care Free Humidifier Plus have built-in antimicrobial properties to inhibit growth of bacteria, mold and fungi that may affect certain parts. Antimicrobial agents in the Care Free Humidifier and the Care Free Humidifier Plus protect key internal parts only. The antimicrobial protection does not extend to users of Hunter humidifier products.

Regardless of which type of humidifier you choose, it is very important to read and follow the usage and maintenance instructions included with the unit.


What is a humidistat and what is its function on the humidifier?

A humidistat is a device that monitors the humidity in the room and automatically turns on or off the humidifier to achieve the desired humidity level. This function on the humidifier keeps it from putting too much water into the air.


Do all humidifiers have humidistats?

No. Many humidifiers simply run until you turn them off. This can create an environment where the air has too much humidity, which can lead to various problems.

Why are Hunter humidifiers called "Care Free Humidifiers"?

Hunter has designed a number of patented features into their humidifiers, which prevent the growth of bacteria, mold, and fungi on the plastic parts and wicks.*

Why are Hunter humidifiers low maintenance?

The use of bacteriostat liquids and demineralizers to protect key internal parts are normally not required*. The Care Free Humidifier Plus permanent wick never needs replacement, saving both time and money.

What is the Regulated Release System?

Hunter has designed the humidifiers to only allow a minimal amount of water out of the tank and into the reservoir. This design eliminates stagnant water while preventing the build up of mineral residue that can clog the filter and impede performance.

* Antimicrobial agents in the Care Free Humidifier and the Care Free Humidifier Plus protect key internal parts only. The antimicrobial protection does not extend to users of this product.




Ventilating Bathroom Exhaust Fan Frequently Asked Questions FAQ

Have a question that is not covered here? Please send your questions to us using our Expert Assistance form so that we may include your questions on this page in the future.

How do I choose the right Broan ventilating exhaust fan for my room?

First, decide which features you'd like from among the available models. Once you've decided on features, you may use the table below to determine the necessary cubic feet per minute (CFM) required for the size and type of room.

Home Ventilating Institute
Recommendations for Ventilating Exhaust Fans

Wall and Ceiling Fans Air Changes/Hour How to Calculate Required CFM*
     
Bathroom 8 L x W x 1.1 = CFM
    Example for a 10' x 10' bathroom:
10' x 10' x 1.1 = 110 CFM
Kitchen 15 L x W x 2 = CFM
    Example for a 10' x 10' kitchen:
10' x 10' x 2 = 200 CFM
Rec Room, Utility
Room, Laundry Room
or Basement
6 L x W x 0.8 = CFM
    Example for a 12' x 20' Rec Room:
12' x 20' x 0.8 = 200 CFM
* Based on an 8 foot ceiling height. L = room length, W = room Width.
* Broan Fans are tested and certified by the Home Ventilating Institute. This is your assurance that each Broan fan has been tested by an independent agency and found to consistently deliver the air and sound performance specified.

How do I determine the noise level of Broan ventilating exhaust fans?

Sound levels are measured by an industry standard called a "Sone." One Sone roughly equals the sound the average refrigerator makes when operating in a quiet kitchen. The higher the Sone rating, the louder the fan. For example, a 4.0 Sone fan is twice as loud as a 2.0 Sone fan.

How do I select an attic ventilator fan based on my roof pitch?

Pitch is the angle of your roof or the rise in feet for every 12 feet of run. Pitch is figured by measuring the height of the attic (in feet) at a point 12 feet from where the roof rafters and the attic floor joists meet.

Once you've determined the pitch of your roof, you may use the table below to determine the correct Broan attic ventilator fan model for your home:

Home Ventilating Institute
Recommendations for Attic Ventilator Fans

    Gable Mount Roof Mount
Roof Pitch   Model
353
900/1140 CFM**
Model
35316
1160/1600 CFM**
Model
350
1050 CFM**
Model
355/358
1200 CFM**
Model
356
1600 CFM**
8/12
or Less
Light
Roof
1285/1630
sq. ft. Attic
1658/2285
sq. ft. Attic
1500
sq. ft. Attic
1715
sq. ft. Attic
2285
sq. ft. Attic
Dark
Roof
1125/1425
sq. ft. Attic
1442/1985
sq. ft. Attic
1304
sq. ft. Attic
1495
sq. ft. Attic
1985
sq. ft. Attic
9/12 Light
Roof
1200/1520
sq. ft. Attic
1549/2135
sq. ft. Attic
1399
sq. ft. Attic
1600
sq. ft. Attic
2135
sq. ft. Attic
Dark
Roof
1045/1325
sq. ft. Attic
1347/1855
sq. ft. Attic
1219
sq. ft. Attic
1390
sq. ft. Attic
1855
sq. ft. Attic
12/12 Light
Roof
675/855
sq. ft. Attic
870/1200
sq. ft. Attic
790
sq. ft. Attic
900
sq. ft. Attic
1200
sq. ft. Attic
Dark
Roof
590/750
sq. ft. Attic
757/1055
sq. ft. Attic
694
sq. ft. Attic
790
sq. ft. Attic
1055
sq. ft. Attic
15/12 Light
Roof
420/530
sq. ft. Attic
559/770
sq. ft. Attic
508
sq. ft. Attic
575
sq. ft. Attic
770
sq. ft. Attic
Dark
Roof
375/475
sq. ft. Attic
486/670
sq. ft. Attic
430
sq. ft. Attic
505
sq. ft. Attic
670
sq. ft. Attic
* Exhaust capacity HVI certified @ .03" static pressure.
** Higher CFM with Broan Model 433 shutter. Lower CFM with standard wood louver.

The Home Ventilating Institute recommends one square foot of open air inlet per 300 CFM of fan capacity. The best location for these air intake vents is under the eaves with direct access to the attic. Vents for gable installations should be placed at the end of the house opposite the installed ventilator. Failure to provide these intakes could cause natural-draft gas appliances to backdraft.




Please send your questions to us using our Expert Assistance form so that we may include your questions on this page in the future.


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