External air input through crawl space

[georgepds]

Hi
I have a Woodstock progress hybrid and am considering adding an external air input (see attached schematic)
My question is can I draw the air directly from the vented crawlspace just beneath the house, or do I need to add a horizontal run (in red) to the periphery of the house. My concern is the long horizontal run (~20’) would just add more pressure drop
I tried to look this up in the code book, but could not find it
TIA
G

 

[Jags]

If that space is vented I don't see any reason why it wouldn't work.

 

[DougA]

Unless your house is built very tight, it will work just fine. Outside air will come in from basement cracks and not in the living area.

 

[Chuck Pearson]

Unless your house is built very tight, it will work just fine. Outside air will come in from basement cracks and not in the living area.

A crawl space is not a basement. It is a space underneath the house just tall enough to crawl in. A quality crawl space might keep the larger wildlife out but does not restrict airflow at all.

 

[DougA]

Oops - - sorry. Hooking it up to a crawl space is perfect.

 

[Highbeam]

My oak draws from the ventilated crawl just under the stove in the center of the house. It's really the ideal place.