4″ x 6″ x 16″ Harlequin Oval Vent Block
Specialized Ventilation Concrete Block
Professional-grade concrete masonry unit featuring an oval ventilation opening for controlled airflow in crawl spaces, foundations, and architectural applications.
Key Benefits
- Controlled ventilation
- Uniform dimensions
- Oval opening design
- Moisture management
- Natural air circulation
- Durable construction
- Insect screening compatible
- Architectural versatility
Technical Specifications
- Dimensions: 4″ x 6″ x 16″ nominal
- Actual Size: 3-5/8″ x 5-5/8″ x 15-5/8″
- Weight: Approximately 18-22 lbs
- Material: Portland cement and aggregates
- Opening: Centered oval ventilation port
- Compressive Strength: 1,900+ PSI
- Color: Standard gray concrete
- Meets ASTM C90 standards
Perfect For
- Crawl space ventilation
- Foundation venting
- Basement air circulation
- Garage air exchange
- Garden walls
- Decorative fencing
- Equipment enclosures
- Climate control structures
Installation Instructions
- Prepare level base or footing
- Mix mortar to proper consistency
- Place in wall system with opening horizontal
- Ensure vent alignment with design specifications
- Maintain 3/8″ mortar joints
- Install mesh backing if insect protection is needed
- Check for level and plumb
- Seal around opening edges if required
Pro Tips
- Calculate required ventilation area for proper air exchange
- Consider installing vent screens to prevent pest entry
- Position vents at opposite sides of structures for cross-ventilation
- Space multiple vents according to local building codes
- Consider weather exposure when positioning
- Clean openings periodically to maintain airflow
- Pair with solid blocks for controlled ventilation patterns
Keywords:
vent block, concrete vent, oval vent block, foundation ventilation, crawl space vent, masonry vent, air circulation block, ventilation CMU
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