Traditional Crawl Space Ventilation Systems

Why Proper Ventilation Matters

Standard metal vents provide insufficient airflow due to low net free area, rust deterioration, and lack of seasonal control. Building codes require 1 square foot of ventilation per 150 square feet of crawl space. Meeting requirements with high-performance vents prevents mold, rot, and structural issues from trapped humidity.

How Traditional Ventilation Works

  1. Calculate Requirements – Codes specify 1 sq ft NFA per 150 sq ft crawl space
  2. Install High-Performance Vents – 95 NFA (nearly double standard) with fewer installation points
  3. Enable Seasonal Control – Removable covers maximize summer ventilation, close for winter pipe protection
  4. Add Active Circulation – Fans accelerate air changes in problem areas
  5. Provide Ventilated Access – Louvered doors add supplemental airflow at entry points

Code-compliant foundation ventilation with superior airflow and seasonal control for passive moisture management.

Crawl Space Air Vents

Crawl Space Air Vents

1 item

Crawl Space Doors

Crawl Space Doors

3 items

Crawl Space Fans

Crawl Space Fans

6 items

Crawl Space Lighting

Crawl Space Lighting

2 items

Example collection

Code Compliance

Meets IRC R408.1 requirements (1 sq ft per 150 sq ft). High-NFA vents achieve compliance with fewer installation points.

Seasonal Flexibility

Maximum ventilation during humid months, closed protection in winter preventing frozen pipes and cold air infiltration.

Superior Airflow

95 NFA moves nearly double the volume of standard 40-50 NFA products. Fewer vents mean lower installation cost.