The Honeywell 18155 is an effective air purifier that is also relatively quiet. You will notice an improvement in air quality within the first 24 hours of use – you can actually smell the difference in the air.

The unit holds a true HEPA filter and a carbon pre-filter that keeps larger particles from clogging the HEPA filter while helping to reduce household odors. The 3-speed fan quickly removes dust, pollen, tobacco smoke, and cat dander from the air. The purifier also helps reduce airborne germs, bacteria, mold spores and fungus with up to 100-percent efficiency as well. Within a room up to 225 square feet, the air is fully processed once every 12 minutes.

The Honeywell 18155’s no-draft technology provides efficient air cleaning without the cool-air exhaust. The unit pulls in air from the room and blows out purified air at a 360 degree orbit. Unlike a fan, the air flow is not direct, though you may feel chilly if you are sitting close by.

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On the highest fan setting, the air purifier is about as loud as a dishwasher from a few feet away, if that. On medium and low, it’s very quiet and doesn’t interfere with TV viewing or conversation.

The unit is lightweight and easy to open when you want to access the filters and there’s an indicator that lets you know when the HEPA filter needs to be cleaned.

People who buy the air purifier to combat allergy symptoms usually find it very helpful, and many comment that their quality of sleep has improved. Households with pets appreciate the way the unit rids the air of doggy smells or litterbox odors.

You don’t really need to run the air purifier on high all the time. You can run it on high for the first day and perhaps while cleaning the house. At other times you can run it on medium or low setting and it will maintain air quality.

Buyers in general have no complaints about this air purifier except for noise. However, most people find it quieter than expected. Keep in mind that it’s a little unreasonable to expect no noise at all from an appliance that contains a motor and a fan.

This is a well-made product that can be a good investment for your home.

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Here are some of the features of the Honeywell 18155 SilentComfort Permanent, True HEPA Air Purifier:

• - Air purifier with hepa filter for rooms up to 225-square-feet
• - Quietly cleans the air with no cold exhaust draft
• - Easy to clean with household vacuum twice a year
• - HEPA filter never needs replacement
• - Electronic filter clean reminder
• - Removes up to 100-percent of bacteria and germs that pass through
• - 19-3/8 L by 19-3/8 D by 19-inch H

Here is what current owners have to say about the Honeywell 18155 SilentComfort Permanent, True HEPA Air Purifier:

P. Drew: “We are on our second SilentComfort Air Purifier. We have had one of these that ran 24/7/365 for about 8 years and the motor bearing finally gave out. I think that was a lot of use and we got our money’s worth on the first one. We replaced it with one exactly like it because we really missed the pleasant white noise it adds to our bedroom. Both the clean air and the soothing noise help us to sleep.”

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If you’d like more information about the Honeywell 18155 SilentComfort Permanent, True HEPA Air Purifier, you can get further details, customer comments, and the latest special price here on Amazon