"It depends where you are in the Bay Area. If on high ground with dry soil there isn't much effect. But in my old house in Alameda where water came up out of the ground when it rained and the soil surface was permanently wet then the…"
"ASHRAE 62.2 specifies a 100 cfm minimum but some recent experimental work at LBNL suggests that 150-200 cfm might be nearer the mark for most range hoods. The question is - where is the other 125 cfm coming from? Microwave range hoods often…"
"In the interests of full disclosure I will start by letting you know that I am a member of the 62.2 committee. I would to know what parts of 62.2 are confusing because we want a usable standard. If you could elaborate, maybe I (or other…"
"The ASHRAE ventilation Standard is NOT about replacing oxygen - it really is about diluting and removing pollutants that are generated indoors by bringing in outside air - wether that is through ducts using a supply fan or through the building…"
"You can use ASHRAE Std 152 that was developed explicitly to do this. Some of the inputs can be a bit obscure - particularly trying to estimate thermal regain but this paper has some reasonable defaults: On-line PDF version
There is also a…"
"Even as I type this my home is recovering from having blown in insulation installed in the walls through exterior stucco and also through lath and plaster. The exterior holes are for the first floor and interior holes are for the second floor…"