Off-grid house needs... gasp!...air!...gasp!
I need some advice...preferably before I cut a bunch of holes in the walls or ceiling and find out that this was a pointless venture.
So the details:
900sq foot one level, mostly open plan, highly insulated and sealed home.
Heating climate...like really... a lot. -40 C is not unheard of for stretches of time. More typical is -20 C
The house is powered completely with PV.
Heat is supplied by radiant slab, a bit of passive solar. I am also putting in a small wood stove in the next few days.
Design loss for the house is somewhere in the 17,000 btuHr....yay!...thats one win at least!
I need air exchange in this house! Stale air...a bit of condensation etc. Nothing horrific, but thats probably because I am constantly opening and closing windows.
Now before everyone starts in about the wonders of ERV or HRV...I simply do not have the power in the dead of winter to run these units. Even the "energy efficient" ones.
A few of them are not even recommended given how cold my climate is.
I really can't put the bath fan on a timer or humidity sensor as it just sucks too much power from the batteries as well.
Like it or not, "I think" I need to put in a few passive fresh air inlet outlet vent openings.
I guess what I need to know is if I put one opening on one side down low on a wall (positive pressure side) and one up high on the other side of the house...will this move the air through the house and exchange the air inside?
Will this leave the interior in a neutral pressure state? Negative? Positive?
Is there a better configuration in regards to locations, heights etc?
Am I out to lunch?
What about condensation in and around the vents?
Any other sage advice?
For the wood stove I would like to put a small air intake right behind it for combustion air. Would it be ok to place it down low right behind the stove near where it pulls the air into the firebox or does high on the wall make more sense.
Thanks a bunch!
Posted Aug 21, 2014 9:12 AM ET
Edited Aug 21, 2014 9:28 AM ET
Other Questions in GBA Pro help