Ryan Fong

Once a runner, sometimes cyclist, lover of travel. Engineer by nature, but not by training. Problem solver, generalist, asks a lot of questions…

[Ryan Fong @rcfong3]

@j_g_allen ACH appears to have been misstated in the study. Never heard of an ACH of 1200 before…. or of an ACM of 20. An ACH of 20 sounds about within range for an airplane.

[Ryan Fong @rcfong3]

@cleanairkits Never mind, see it is 200. Thanks!

[Ryan Fong @rcfong3]

@cleanairkits What is the CADR?

[Ryan Fong @rcfong3]

@CountyElDorado @kcranews

[Ryan Fong @rcfong3]

@CountyElDorado Thought N. Fork Cosumnes River was supposed to flow under the Sweeney Bridge and not over and around it.

[Ryan Fong @rcfong3]

@CountyElDorado @kcranews Sweeney Bridge on N. Fork of Cosumnes River. This is exactly what happened in 1997! Sweeney Rd and Happy Valley Rd impassible for emergency access or evacuation of residents. Equipment needed to clear areas around edges of bridge to allow water a pathway out!

[Ryan Fong @rcfong3]

@kcraFinan @kcranews North Fork of Cosumnes River has overtopped Sweeney Bridge in El Dorado County in Happy Valley and blocked river under bridge with debris, as it did in 1997. Needs clearing to allow water to escape downstream. Happy Valley Road is underwater and impassable at Sweeney Road.

[Ryan Fong @rcfong3]

@MBandurKCRA @kcranews Flooding currently on North Fork of Cosumnes River on Happy Valley Rd at Sweeney Rd. Sweeney Bridge blocked with logs and overtopping as in 1997. HV Rd and Sweeney Rd impassable.

[Dr. Saskia Popescu @SaskiaPopescu]

Fellow South-West folks… please get your booster and be mindful of masking in crowded indoor places. In the last two weeks, AZ has seen a 101% increase in cases, Nevada has a 92% increase, New Mexico a 53%, and Colorado is seeing a 25% increase in cases.

[LongCovidPharmD @organichemusic]

💊NATTOKINASE Survey Data💊
Interesting results!
Efficacy appears to ⬆️ w total daily dose (TDD). While 2000-4000 FU TDD looks similar, efficacy appears to improve around ≥6000 FU TDD w/ most taking ≥4000 FU twice daily. Note no one reported feeling worse at ≥9000 FU TDD.🧵

[Shiven Taneja @ShivenTaneja]

I thought last night was very special as I made my 100th #CorsiRosenthalBox. This evening, I am humbled, honoured, and inspired by the kind words of encouragement. https://t.co/Sxkk58lCos
Thank you to: 1/4

[Ryan Fong @rcfong3]

@JimRosenthal4 Probably good from a noise and exhaust direction & distribution/mixing standpoint, I would think.

[Ryan Fong @rcfong3]

@JimRosenthal4 Isn’t the removal of virus through use of HEPA filtration not reflected at all with a CO2 monitor? What percentsge of ACH is through ventilation versus filtration? Many do not understand or realize that CO2 monitors do not pick-up the benefits of filtration at all.

[Putrino Lab @PutrinoLab]

Proud to have made a small contribution to this amazing book. Absolutely humbled by my co-authors...the imposter syndrome was strong!

[Joseph Allen @j_g_allen]

Good thread on ventilation tips (and how to get the most out of open windows).

[Ryan Fong @rcfong3]

@JimRosenthal4 @CleanAirStars @SpeakUpAmerica_ @CorsIAQ @CleanAirCrewOrg Yeah, I was thinking the same. Some of the fiberglass spun MERV1 pre-filters look like they mainly catch leaves as can easily see through them and very thin. Wondering where sweet spot was. How much flow loss with your open cell foam?

[Ryan Fong @rcfong3]

A variation on a Corsi/Rosenthal cube for a classroom when space may not allow a full-sized cube. 20x20x4 MERV13 filter with a 20x20x1 “panel” pre-filter that can be replaced to extend the life of the MERV13.
@SpeakUpAmerica_ @CorsIAQ @JimRosenthal4 @CleanAirCrewOrg

[Ryan Fong @rcfong3]

@CattGerald It’s a cost thing…

[Ryan Fong @rcfong3]

This does not sound good…

[AJ Leonardi, MBBS, PhD, MPH @fitterhappierAJ]

I did not believe this when Amy wrote this to me but this is true

Nucleocapsid is detected in CD8 T cells

This is extraordinary

[Ryan Fong @rcfong3]

@DavidElfstrom @CleanAirCrewOrg @JimRosenthal4 @CorsIAQ @LazarusLong13 So, a box fan w/single 4” MERV13 and no pre-filter? When do you replace the MERV13 filter in terms of % of original efficiency? Does adding air space volume between filter & fan affect airflow rate?

[Ryan Fong @rcfong3]

What is the most efficient build if one expects to utilize a Corsi-Rosenthal-Comparetto Cube for multiple years, replacing filters periodically? Assume 1”MERV8 = $6 & 2”MERV13=$14 @CleanAirCrewOrg @JimRosenthal4 @DavidElfstrom @CorsIAQ @LazarusLong13

[Ryan Fong @rcfong3]

Lifecycle for C-R Cube needs to be considered. How best to minimize rebuild frequency & $? What if one added 1” MERV8 (or lower) filters on top of 2” MERV13? Filter change frequency for each? Air flow rate? Increase in efficiency? Better than just changing all 2” - MERV13?