Dryer vent

[David Noonkester]

What is the distance a dryer vent that goes through the foundation need to be from a foundation vent from the crawlspace?

[Brian Hannigan]

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[Roy Lewis]

What is the distance a dryer vent that goes through the foundation need to be from a foundation vent from the crawlspace?

Its doesn't matter as long as it's exhausted to the exterior.

"M1502.6 Duct length.
The maximum length of a clothes dryer exhaust duct shall not exceed 25 feet (7,620 mm) from the dryer location to the wall or roof termination. The maximum length of the duct shall be reduced 2.5 feet (762 mm) for each 45-degree (0.8 rad) bend, and 5 feet (1,524 mm) for each 90-degree (1.6 rad) bend. The maximum length of the exhaust duct does not include the transition duct.

This means that vents should also be as straight as possible and cannot be longer than 25 feet. Any 90-degree turns in the vent reduce this 25-foot number by 5 feet, since these turns restrict airflow. "
https://www.nachi.org/dryer-vent-safety.htm

[Jerry Peck]

Roy provided the old standby code length, which evolved over time into allowing longer lengths and options - go here: https://codes.iccsafe.org/public/document/code/553/9853026

Scroll down to M1502.4 Dryer exhaust ducts.

Way to much to type, also note M1502.4.5.2 Manufacturer's instructions.