We moved into a ~3500 sq.ft split level rambler in the spring.
The 30 year old construction is MUCH better than average, with polyethylene
vapor barriers in all the walls and ceilings, good windows, etc...
Problem, is it is almost TOO tight. Stale air...
Luckily, it is an All Electric house with a fairly recent and efficient
The question is How much outside air to bring in?
I was considering putting in a 6" duct with a motorized damper from the
return to the outside. The Run would be about 25' when I get done snaking
it where it can go.
Will a 6" duct provide sufficient Air passively or do I need something like
an in-line Fantek ?
I will be controlling the damper with a home automation system than monitors
the outside temp & humidity along with the inside and trying not to waste
too much energy. I was also thinking about putting a pressure differential
switch in so that when the Kitchen fan, dryer and/or the bath fans generate
a negative pressure in the house the damper would also open...
Eventually the duct would feed a whole house dehumidifier so I could get rid
of the consoles in the furnace room... they keep the house comfortable at
higher temperatures than using the AC to remove the humidity and use less
energy to do so.
I am in Central Maryland, just north of Washington DC... so we get all kinds
of weather and humidity...
POLITE thoughts please ?