@WaltC The included filter package is for “one year”, comprised of four pieces. This is a slightly optimistic duration, as are any advertised numbers, but the HEPA filter lasts about a year, and the three pre-filter components are activated carbon for removing larger dust, hair, lint, as well as helping with minimising odours. Those carbon filters are supposed to go for about three months, per the manual, and reviews from various sites. The common pricing for this yearly filter set is about $38 from Home Depot, and a mite cheaper from the Amazon sellers.
I have used a few of these units in the past, and they are a good option for folks on realistic budgets, who deal with allergies or asthma, or have some sensitivity to scents. There are better models, but they end up costing far more for a diminishing return on the number and quality of improvements. Anything with true HEPA filtration will cost a pretty penny, but do fairly well, but these are good enough that I nabbed a couple from this sale.
@WaltC I run the living room one all the time (on fan speed 3/4) and the filter alert told me to change the hepa at around 8 months.
Mine came (from costco) with 2 hepa and 8 carbon (they recommend changing the carbon every 3 months)… the main page for this shows “We’re including a year’s worth of carbon filters, because we are nice” so my guess is this comes with 1 hepa and 4 carbon pre-filters.
@rsheldiii Depends. If you’re sensitive to the smell of, ahem, herbal cigarettes, something like this will make it a lot less clear that you enjoy those if anyone smells your living space. I heard, anyway.
The important question; How much ozone does this produce?
A plasma in an ionized gas. So they are using marketing technology to avoid saying this has ion generator.
Ions clump dust together which makes fewer but heavier particles. If the ions make it out of the machine, then dust will collect on surfaces where the output air turns or slows down. Naturally, the filters have an easier time catching larger particles. The ions also help dust of any size get stuck in the filters. The big downside of ionized air is ozone generation. Ozone is bad for lungs.
Big Clive takes apart an old ion generator and explains how it works in
That ion generator has no fan, so the dust coats every surface near the air flow.
Simply ionizing air will make it move, but not nearly as fast as a fan.
@hamjudo From the reviews I’ve seen, this doesn’t create ozone. The PlasmaWave process creates hydroxyl radicals, which are supposedly safer than ozone. I can’t 100% confirm this, as this is all coming from 3rd party reviews and not from the manufacturer themselves.
@pixelated COVID-19 is said to be around 0.125 micrometers. I think true HEPA filters are rated to get rid of 97% of particles 0.3 micrometers and over. It will definitely not catch all particles the first time through, but it might work if it goes through several times.
@DoggyDov@pixelated Corona viruses as a group don’t cause disease after they dry out. Once they shrivel up, they are never the same again.
The virus can’t float free, it needs to ride along with some snot.
That’s why surgical and N95 masks are as effective as they are. They reduce the rate of transmission by a factor of four for respiratory viruses. The globs of snot are bigger than just the virus.
The study to test masks used parents caring for sick children at home. In some of the families, the parents were assigned to wear N95 masks, others were assigned surgical masks, and the control families did not wear masks at all. The statistics for the people who were supposed to wear masks, but didn’t do it all of the time when with their child, were dumped into an appendix and otherwise ignored.
They sequenced each child’s virus. If a parent got sick after taking care of their child, their virus was sequenced. If the parent’s virus was very closely related to the child’s virus, then they knew the path of transmission.
Some illnesses are easier to spread than others. The paper broke down the transmission rates of the different illnesses. For each illness, mask wearing parents got their child’s disease about 25% as often as parents that didn’t wear a mask. The disease transmission rates weren’t statistically different between the N95 masks and the surgical masks.
Before that study, almost no parents wore masks while taking care of their own children. They can’t repeat the study, now that we know everybody should wear masks around people with viral respiratory diseased, even family.
Other studies have shown that N95 masks work about as well at preventing transmission as the surgical masks when worn by sick adults. Even though the N95 masks don’t filter outgoing air nearly as much.
@DoggyDov@pixelated it actually traps better lower and greater than 0.3 microns. That is the highest penetration particle. As they get smaller the HEPA actually causes them to stick to the surface as they move around. Not stuck in the fibers, like the larger particles, but on the surface. (Certified BSC’s and laminar flow hoods for 10 years)
The best part of these devices is that the filters are NEVER a standard size - so you can’t simply buy decent hi-MERV replacements, you have to buy their ridiculously priced ridiculously sized filters (or hillbilly smaller ones to fit with duct tape - as I have done on my current Electrolux)
These things are the $20 printers (with $150 cartridges you have to use) of the air cleaner world.
Video on YouTube but it was very interesting someone taped a HEPA filter to a box fan and they had a tester that measures particles seems the box fan. Just as good a job as the expensive one that came from the retail store it’s amazing how someone with a great imagination can come up with these Contraptions that save us all money