Do you think the air loss will be minimal in the following situation
Underground duct with some separation at the joints, trenched and encased in pea gravel but surrounded with clay soil. There is also a 4" layor of pea gravel under the slab. The perimeter of the house is CMU block with clay backfill.
i.e. do you think the clay will stop the air flow leakage like clay stops water flow.
You can share this discussion in two ways…
Share this link:
Send it with your computer's email program: Email this