Lynden Door VA4 VanAir Ventilated Door: 696 CFM Airflow with 25 STC Sound Privacy

The VA4 VanAir door solves the traditional trade-off between ventilation and privacy. This 1-3/4 inch engineered door moves up to 696 CFM of air at 50 Pa pressure differential while maintaining up to 25 STC acoustic privacy — performance that matters when you’re designing offices, healthcare facilities, or high-end residential spaces where both air quality and sound isolation are non-negotiable.

The door’s staggered ventilation slots provide airflow comparable to a 12”x12” grille while maintaining sound privacy equivalent to a solid core door. That’s the engineering achievement here — getting serious airflow without sacrificing acoustic performance.

Quantified Performance That Contractors Can Specify

The airflow numbers tell the real story. Standard configuration without foam delivers:

Pressure Differential	Airflow Rate
5 Pa	199 CFM
10 Pa	312 CFM
20 Pa	436 CFM
50 Pa	696 CFM

Need acoustic priority? The sound option with foam seal cuts airflow but maintains privacy:

Pressure Differential	Airflow Rate (Sound Option)
5 Pa	100 CFM
10 Pa	156 CFM
12 Pa	170 CFM
50 Pa	355 CFM

The door provides 80-140 square inches of ventilation area with approximately 50% unrestricted free area. That’s 50% open area versus 15-30% for traditional louvers — more efficient airflow without the visual disruption of standard grilles.

The integrated acoustic baffles use Helmholtz resonators tuned to both high and low frequencies. This isn’t marketing fluff — the door meets ASTM E90-09 for sound transmission loss and E413-10 for classification. For maximum STC performance, pair it with PEMKO STCSET-1A full perimeter seal set.

Real-World Benefits That Solve Building Problems

The health and humidity control benefits aren’t theoretical. Testing documents a 20% reduction in CO2 buildup in bedrooms. In bathrooms and laundry rooms, humidity drops by up to 20% compared to standard doors. For Montana’s variable climate where managing indoor air quality without cranking the HVAC matters, that’s measurable energy savings.

The door’s airflow pathway works on pressure gradients, enhancing cross-ventilation without ducting or wall modifications. No power required. No maintenance. Just passive ventilation that keeps working.

Applications span both residential and commercial:

Residential: Bedrooms, home offices, laundry rooms, bathrooms, home theatres, pantries, mudrooms

Commercial: Offices, meeting rooms, phone booths, IT/copy rooms, schools, healthcare facilities, hotels, mechanical rooms

Available in sizes up to 4’ x 10’, the door handles most commercial applications. Custom sizes available on request for projects needing non-standard dimensions.

Construction and Compatibility Details

The core uses engineered wood composites with an integrated vertical air channel. Face options include:

• HPVA Architectural ‘A’ grade wood veneer (standard)
• AA grade veneer (optional)
• Paint-grade MDO
• Hardboard
• HPDL (High Pressure Decorative Laminate)

Environmental considerations matter in commercial specs. The door features NAUF (No Added Urea-Formaldehyde), No-VOC factory finishes, and FSC-certified wood options. It’s TSCA Title VI Compliant with EPD (Environmental Product Declaration) available.

The door arrives pre-assembled and factory machined for hardware per shop drawings. Standard hinges, closers, and sweeps work without special adapters. Lock blocks come pre-installed, with special blocking HB-1 through HB-8 available for heavy-duty applications.

The 1-Year Limited Warranty covers defects in material and workmanship for interior use only. Non-rated for fire applications — this is about ventilation and acoustics, not fire separation.

Frequently Asked Questions

How does the VA4 compare to traditional door louvers?

The VA4 offers a clean, flush appearance versus visible slats/grilles while providing higher STC (up to 25) compared to open-frame louvers that transmit more sound. VA4 provides ~50% open area versus 15-30% for traditional louvers, delivering better airflow efficiency without the institutional look.

What hardware preparation comes standard?

The door comes factory machined for standard hinges, closers, and pocket hardware. Lock blocks are pre-installed. No field modification needed for standard hardware installation.

Can this door work in high-humidity environments?

Yes. Testing shows up to 20% humidity reduction in bathrooms and laundry rooms compared to standard doors. The passive ventilation helps manage moisture without mechanical systems.

What’s the actual thickness and will it fit standard frames?

The door is 1-3/4 inches (45 mm) thick — standard commercial door thickness that fits typical frames without modification.

Does the ventilation system require power or maintenance?

No. The airflow pathway works purely on pressure gradients. No motors, no filters, no maintenance beyond normal door care.