Vornado MD1-0008 HEPA 15 Review

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(More customer reviews)It does work and keeps the air fresh - I didn't change mine for literally years (I would take it out and hand clean it periodically which I don't think hurts anything, but finally I decided I had better get a new one.
It is quite easy to remove and put back in, no problem there, seems a simple process.
Seems tremendously expensive when you see what it is - but maybe there's something I'm not understanding in the technology of making it. As I said though I did go several years (more than 5, with regular use), before I replaced it. Cheaper than a whole new air purifier.

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Honeywell 22500 Hepa Replacement Filter Review

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(More customer reviews)I purchased this filter from "Allergy Be Gone" via Amazon. It was advertised as "Genuine Honeywell True HEPA filter" but when the product arrived it was clearly made by some other company than Honeywell. And it is not of the same quality as the Honeywell HEPA filter (the Honeywell has soft rubber gaskets while the one that I received has hard plastic gaskets which makes it harder to seal the filter in the unit).

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Genuine HoneywellTrue HEPA filter. 99.97% effective at removing particles as small as 0.3 microns from the air that passes through the filter. Fits Model 12520 series and model 17400.Overall particle reduction depends on many factors including the amount of air processed, the pollutant type and the pollutants' introduction rate into the environment.

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Honeywell 50250 99.97% Pure HEPA Round Air Purifier Review

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(More customer reviews)In this review, I will first summarize the major points and focus the details afterward. This way you can stop reading when you get the level of details you need. The definitions of "HEPA" and "CADR" are placed at the end of this review. Please vote for this review if you like it :) I appreciate it.
**Kimmer (another reviewer) has kindly uploaded a wonderful youtube video to demonstrate the noise level, title: "Honeywell Enviracare 50250 air purifier". Since your computer speaker will affect the demonstrated noise level, make sure you gauge the noise to Kimmer's voice.**
Pros: Powerful, inexpensive, permanent HEPA filter, easy to maintain, 360 degree air intake and output, portable, accessible replacement parts, good support from Kaz, a 5 year limited warranty.
Cons: Noisy, high power consumption, not stylish.
Previously I owned the Honeywell HFD-130 Germicidal Tower HEPA Air Purifier with Permanent IFD Filter, but due to its ozone emission and my respiratory problem, I returned it back to HomeDepot. I got fully refunded and bought this Honeywell 50250N on the same day and loved it. I have a mild allergy. I sneeze and experience itchy eyes when I am outdoor, but stop when I am at home (where my purifier is). I recommend two important points when shopping for a purifier: (1) always examines the CADR number. It is a decent performance indicator, (2) always buys an air purifier adequate for your need. A 100 sq ft purifier will not work for a 1000 sq ft living space.
Honeywell 50250N is a true HEPA filter purifier with a 250 CADR, which translates into a recommended 375 square feet usage space. Currently, this purifier is being sold at ~$160. It has been quoted as the only purifier

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Ideal for larger rooms (up to 390 square feet), the Honeywell Round Air Purifier (model 50250) features a True HEPA filter that removes 99.97 percent of common airborne pollutants as small as 0.3 microns from the air passing through it such as dust, pollen, tobacco smoke, mold spores and cat dander. Honeywell's glass-fiber HEPA material also helps remove airborne particles, viruses and bacteria without the use of chemicals or other treatments.
Honeywell's SurroundSeal HEPA filter technology helps assure that virtually all of the air drawn into the air cleaner passes through the HEPA filter. Other features include 360-degree airflow, 3 speeds, a carbon pre-filter (model 38002) and an Intelli-check electronic filter change indicator. This unit measures 18 by 18 by 19 inches and is backed by a 5-year limited warranty.
Clean air delivery rate (CADR):
250 Pollen
250 Dust
250 Smoke
Clean Air Delivery Rate (CADR) indicates the volume of filtered air delivered by an air cleaner. Created as a standard to compare the effectiveness of air purifiers. The number rates the volume of air that is filtered by the unit when it is cleaning each of the contaminants from the indoor air.

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