[Greenbuilding] vent waste heat recovery--in reverse?

[Chris Green]

barbara deane-gillett wrote:
> you might also look into the heat loss caused by internal roof drains in large 
> buildings.
>   
Good point. Thanks for bringing that up. You can add the vents stacks 
from the plumbing to the list as well, I think--the ones designed to get 
rid of the methane. Perhaps these should be insulated from the interior 
air envelope wherever possible.

Cheers,

Chris Green.