Minimum efficiency reporting value

Okay.

And I always recommend MERV 8.

Now, if your system is designed for a better, higher MERV rating, that's fine, but make sure it is because if you put too restrictive of a filter, you'll cause a lot of damage to your system, right? Is there a way you

can find that out? Well, if you have one of our bionifications, we'll know exactly because we're going to come out and

test your system and make sure it's working within the manufacturer's specifications, right? So if you want to get real science-y, your furnace filter should not be more than 0.1, a tenth of an inch of static for proper airflow through the filter.

I think the price point is sort of why people are so scared to manufacture them.

Because let's just say most filters are about MERV 13.

You can go up to MERV 17 currently.

Um, nobody has yet.

And I've done some research.

And of course, air conditioners are meant to provide good thermal comfort.

But if they have good air filters, we usually go by MERV rating.

If the MERV rating is 14 and above, and air conditioners may also be good but usually the move rating could be low for normal in air conditioning system it could be seven eight or you know nine something out and around that number so we cannot generalize and say that air conditioners of all types are very effective in capturing particles that would depend on the kind of filter contained in air conditioning units.

And like you pointed out, we have to make sure that the filters are replaced from time to time and air conditioning systems are well maintained during smoke case episodes.

So we cannot take for granted that all air conditioning systems will continue to be effective forever.

But when that air blows out, it stirs up a lot of stuff.

So our studies show that the air inside of a house, if you have a high-efficiency filter in there with a MERV rating of at least 12 to 14... that your room air will be just as clean as if you stuck a filter in there with a MERV rating of 18 to 22, which is what those expensive allergy filters are.

Ah, okay.

So what are you seeing most right now? Is it the typical ragweed and stuff that come into your office? What are you treating most?

Incense is nice, but a lot of toxic substances there.

Anyway, so they have something called MERV rating.

And you only get a MERV rating of at least 12.

One we're using has a MERV rating of 16.

That means that 99.9% of the PM2.5 is cleared out by the system.

So the worst stuff is cleared.

But Rusty, let's go to that question.

Again, Steve from Tomball, "I see all kinds of air filters at the hardware store, different sizes, MERV ratings, HEPA filters.

What should I be using and how often do we really need to change them?"

That's a great question.

My knowledge and understanding has improved, and in hindsight, wish it had been better 15 years ago.

But we've gone from a MERV 14 to a MERV 16, and, you know, to understand there is no such thing as this absolute filter, whether it's precipitation or the fiberglass filter.

We're dealing in log reductions all the time, whether it's HEPA, 16, 14, et cetera.

So we've learned a lot in understanding, and, and really, you think about it, a 5,000 sow farm, for example, at minimum ventilation is almost 200 or over 200 million cubic feet of air being exchanged through that barn every 24 hours.

So very high.

So we know then when the virus challenged the system, it would be removed, right? All a matter of quantity, but we felt confident about that measurement.

And then in terms of how it compares with the filters, actually they compares very similarly, right? Uh, but the, the other thing that we are learning, so very high collection efficiency and compares very well and with the MERV 16 filters in particular.

But one thing we are learning is that collection efficiency doesn't stay as, um, fixed value all the time.