4″ x 6″ x 16″ Harlequin Oval Vent Block

4″ x 6″ x 16″ Harlequin Oval Vent Block

Specialized concrete block with centered oval opening for controlled ventilation in foundation and architectural applications.

Key Features:

  • 4″ x 6″ x 16″ nominal dimensions
  • Centered oval ventilation opening
  • Standard gray concrete
  • 1,900+ PSI compressive strength
  • Durable construction
  • Compatible with insect screening
  • Approximately 18-22 lbs per block
  • Meets building code requirements

Perfect for:

Crawl space ventilation, foundation perimeter venting, basement air circulation, and decorative applications requiring airflow management.

– Nationwide Delivery In 1-3 Days

$12.00

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

  1. Prepare level base or footing
  2. Mix mortar to proper consistency
  3. Place in wall system with opening horizontal
  4. Ensure vent alignment with design specifications
  5. Maintain 3/8″ mortar joints
  6. Install mesh backing if insect protection is needed
  7. Check for level and plumb
  8. 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

Dimensions 41 × 15 × 10 cm
4x8x16;6x8x16;8x8x16

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