Tom Phillips replied to Don Fugler's discussion Depressurization/make-up air issues in Kitchen Ventilation
"Don: thx for the excellent questions, as usual ! (hope this is not redundant; it is my second try in commenting on this)
re: combustion safety, I would stress source control as the first and most reliable measure (remove or minimize the indoor &…"
Aug 30, 2019
Tom Phillips replied to Tom Phillips's discussion Kitchen Ventilation Resources in Kitchen Ventilation
"Selected updates with new Info:
COOKING EMISSIONS & VENTILATION
-- UK study of PM emission rates for 4 full meals.  "Using a cooker hood (apparent capture efficiency > 90%) and frying in non-stick pans were found to significantly reduce emissions.…"
Apr 8, 2019
Tom Phillips replied to Don Fugler's discussion Depressurization/make-up air issues in Kitchen Ventilation
"Brennan:
re: CMHC reports: if you don't have any luck, I can track down the big pile of hard copies I collected at CARB (may be in the Cal EPA library, or in my home file storage)."
Mar 28, 2019
Tom Phillips replied to Don Fugler's discussion Depressurization/make-up air issues in Kitchen Ventilation
"Hi Dara:
thx for the update.  Sounds like you made some progress.
CA still has a lot of natural draft and some (illegal) unvented gas log sets, but we are now pushing to decarbonize not only the grid but also (finally) buildings. So there may need…"
Mar 26, 2019
Tom Phillips replied to Don Fugler's discussion Depressurization/make-up air issues in Kitchen Ventilation
"Dara:
thx for the reminder. 
As I recall, CMHC funded some studies on this, which you probably did and know well, as would Don Fugler. 
Also, Dave Grimrsud et al at U. Minn and Niren Nagda observed and recorded this problem in at least one home. …"
Mar 26, 2019
Tom Phillips replied to Don Fugler's discussion Depressurization/make-up air issues in Kitchen Ventilation
"Hi Don:  good questions, as usual.
Would be great to routinely get depressurization data --  not hard to do.
See my NAPHN 2019 slides near the end for example of P measurements for installed MA system, at ROCIS Range Hood page).
re: consequence #4:…"
Mar 25, 2019
Tom Phillips replied to Shanna Kovalchick's discussion Outdoor Air Quality in Low-cost residential particle monitoring
"Just curious: Has the air district (or local AQ researchers) seen such anomalies before?"
Feb 7, 2019
Tom Phillips replied to Don Fugler's discussion Depressurization/make-up air issues in Kitchen Ventilation
"Luke:
re: hood flow rate and make up air recommendations, see my slides from NAPHN 2018 (p. 34  +) and the Tools section (aww Broan's online tool for MA system design), at http://rocis.org/range-hood-tools-and-presentations.
150 CFM might work in a…"
Feb 7, 2019
Tom Phillips replied to Shanna Kovalchick's discussion Outdoor Air Quality in Low-cost residential particle monitoring
"Interesting!  Were similar changes seen in the regulatory AQ monitoring sites?
if not, can you rule out artifacts in your PM sensors re: changes in temperature, humidity, pressure etc.?"
Jan 31, 2019
Tom Phillips replied to Tim Kendzia's discussion Cooling effect from solar panels
"HI Dennis;
good point re: PV benefit of load shifting re: waste heat.

I was referring to the whole cooling system, which is removing heat from a building.  If the building shell and cooling system are not very efficient, then PV systems are still…"
Jan 2, 2019
Tom Phillips replied to Tim Kendzia's discussion Cooling effect from solar panels
"re: hard data, I recall seeing at least one study that showed some cooling from PV shade on roof.  Suggest you contact David Sailor's groups at AZ State U. re: their  project:
Impacts of Photovoltaic panels on urban climates and building energy use.…"
Jan 2, 2019
Tom Phillips replied to Linda Wigington's discussion Good Eating with Reduced Cooking Emissions in Kitchen Ventilation
"Certainly did, using my eye & nose sensors.
1) smoke & lingering odors from frying bacon. Visiting family were doing that cooking (we rarely cook bacon). 
Good news:  the next time I cooked bacon, I put a lid over the pan, left it slighlty open on…"
Dec 27, 2018
Tom Phillips commented on Corbett Lunsford's video
"Hope they also measure  indoor heat exposure (T, RH or Twet, radiant T) and compare to modeled estimates and overheating guidelines such as CIBSE TM 59 and Passive House."
Dec 20, 2018
Tom Phillips replied to Linda Wigington's discussion Good Eating with Reduced Cooking Emissions in Kitchen Ventilation
"See list of Easy Ways to Reduce Exposure (and in some cases, toxicity) in the ROCIS Range Hood best practices guide and the NAPHN 18 slide show.
Cooking outside also helps keep the house cooler in the summer, but can add to outdoor air pollution and…"
Oct 25, 2018
Tom Phillips replied to Don Fugler's discussion What indoor particle sources have you noticed? in Low-cost residential particle monitoring
"I suspect your variable results are due to
1) mainly variation in type of candle, wick, and burn condition.  There are lots of studies on this, and some on the toxicity of candle and incense emissions (the latter are really nasty).
2) particle sizes…"
Oct 25, 2018
Tom Phillips replied to Don Fugler's discussion Choosing a range hood in Kitchen Ventilation
"thx, Don.
See slides 16-17
BTW, it is a modeling study , based lab data and assumed outdoor PM2.5 levels and infiltration rates, and an electric stove.
"your exposure results may vary", e.g., if you have higher outdoor PM levels, higher emissions…"
Sep 25, 2018
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