|
|
re: renewable reach of car - the truth is dangerouse
4 may 2005
blue cat wrote:
>> > heat recovery from waste air is already a standard at most new houses
>> > in austria and germany
it makes little sense for most us houses which naturally leak lots of air.
>if your house is too tightly sealed, you may have problems with stuffiness
>and increased carbon dioxide. there has to be a certain amount of fresh air
>brought into the house...
about 15 cfm per full-time occupant, eg 30 cfm for a 2400 ft^2 house with 4
50%-occupants, ie 30x60m/h/(2400ft^2x8') = 0.09 air changes per hour. an
average us house might leak 2 ach on a cold windy day, 1 ach on an average
day and 0 ach on a calm warm day. better to "make it tight" and "ventilate
it right" with something like an exhaust fan and a humidistat.
nick
|
|
