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re: furnace humidifiers; was re: not needed--pyjamas
21 dec 2001
chloe wrote:
>...the last thing i want is an airtight house. i've lived without furnace
>humidification, and i've lived with it. it's not that expensive, and
>it feels miserable inside in the winter without it.
i'd say what you want is "humidity," vs "humidification." that can come
from air-sealing, or a humidifier. the former is far more energy-frugal.
keeping indoor air at 70 f with 50% rh and 0% outdoors and 4 full-time
occupants requires 18.8 cfm of air leaks, 0.0625 ach for a 2400 ft^2
one-story house. difficult, but...
bill shurcliff described an air-air heat exchanger that could be very
efficient, even at latent heat transfer, an external "lung" for a house
that breathes in and out and makes all the house cracks and crevices into
bidirectional heat exchange surfaces, like a camel's nose. one might make
a 60 ft^3 (4' cubical) lung with a fan that moves air in over 30 sec and
moves air out over the next 30 sec, or partition the house in 2 parts,
with a bidirectional dc fan between them.
nick
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