Thread by @marwa_zaatari

📢📢New! Air Cleaners Comparison:
1- Selection graph: 1.a. all + 1.b. only HEPA
2- Data download link
3- Request data link
4- Where to place air cleaner?
5- Calculate reqs
6- CADR and noise
7- Letter about unproven tech.

@CleanAirCrewOrg @DavidElfstrom
@kprather88

1a - Selection Graph - All (includes ionizers = unproven tech)
- X axis first cost + first year filter replacement cost in USD
- Y axis: Clean Air Delivery rate = volume of clean air in CFM (cubic feet per min) = ~efficiency x airflow

1b - Selection Graph - only includes HEPA
- X axis first cost + first year filter replacement cost in USD
- Y axis: Clean Air Delivery rate = volume of clean air in CFM (cubic feet per min) = ~efficiency x airflow

Fun Fact:
On average, for each 1 cfm of clean air you pay $1.8

2 - Link to download the data:
docs.google.com/spreadsheets/d…

Two tabs:
- first tab imperial units
- second tab SI units

Press File --> Download
@jljcolorado

3 - Link to add purifiers you like to see added:
docs.google.com/spreadsheets/d…

Add directly into the sheet.

4 - Where to place air cleaner?
Place air cleaner 2-3 ft away from walls or open windows and doors. Do not block the unit’s air inlet or outlet, and place it as close as possible to the teacher and between the teacher and the students.

5 - How to calculate CADR, how much clean air you need?
@j_g_allen @ShellyMBoulder tool:
docs.google.com/spreadsheets/d…

Rule of thumb: Look for a unit with a tobacco smoke CADR = 2/3 your room area.

6 - CADR and noise:

This graph shows comparison of 2 air cleaners with same CADR at highest setting. However, considering the noise, I would not go for the cheaper option here.

Thanks to
@DavidElfstrom
and
@JudahWorldChamp
for data.

7 - Open letter to distribute to schools about unproven technologies:
medium.com/open-letter-to…

Next:
Corsi-Rosenthal box data

👉#corsirosenthalbox: here is the updated graph with 3M testing. CR box for the win!

@MikeLaninga do you have data for CADR at the different fan speeds? Noise?

#corsirosenthalbox @CorsIAQ @JimRosenthal4 @CleanAirCrewOrg @DavidElfstrom @3M @MikeLaninga

👉#corsirosenthalbox gives you the most clean air per $ ($/CADR), take a look: