
34½ x 34½, VCE 3434, Electric Venting Curb Mount Skylight with Room Darkening Shade
VELUXVELUX VCE 3434 – Electric Powered Venting Skylight (Curb Mount)
The VELUX VCE 3434 2004S delivers a perfect balance of daylight and fresh air in a modern, square design. With equal width and height, it’s ideal for symmetrical ceiling layouts or open spaces that need centered natural light—like kitchens, bedrooms, lofts, or offices.
Powered by a wall-mounted remote, this curb-mounted skylight opens and closes with ease, improving indoor air quality while brightening the space from above. A built-in rain sensor ensures automatic closing at the first sign of moisture, while laminated LoE3 safety glass offers exceptional UV protection, thermal performance, and sound insulation.
This model is a favorite for homeowners looking to combine ventilation, daylight, and clean design in a single, high-performance unit.
Key Features & Benefits:
- Effortless Electric Ventilation: Experience on-demand fresh air with the quiet and efficient concealed motor, providing smooth and easy opening and closing at the simple touch of a button.
- Convenient Hardwired Installation: Designed for direct electrical connection to a standard junction box, this unit includes a generous 20-foot wire, offering flexibility during installation.
- Intelligent Rain Sensor System: Rest assured during unexpected weather changes. The built-in rain sensor automatically detects moisture and promptly closes the skylight, safeguarding your home's interior.
- Long-Range Remote Control: Enjoy the convenience of operating your skylight from up to 110 yards away with the included battery-powered radio-frequency remote control.
- Integrated Defense Against Insects: Keep your indoor environment comfortable and pest-free with the included insect screen, allowing fresh air in while keeping bugs out.
- Premium Laminated LoĒ3 Glass: Benefit from exceptional energy efficiency for year-round comfort and the added safety and security of laminated glass.
- User-Friendly Remote Operation: Easily control your skylight's functions with the intuitive VELUX remote control.
- Seamless Curb Mount Design: Engineered for straightforward installation on a site-built curb, ensuring a secure and weathertight seal to prevent leaks.
- ENERGY STAR® Qualified: Take advantage of high-performance glass that improves insulation, contributing to lower energy costs.
- Advanced Neat® Glass Coating: Enjoy a consistently clearer view with the innovative Neat® glass coating that actively reduces water spots and the accumulation of dirt.
- Enhanced Acoustic Comfort: Create a more tranquil home atmosphere with the skylight's ability to minimize outside noise intrusion.
- Smart Home Integration Ready: Effortlessly connect with the VELUX ACTIVE with NETATMO system for automated and intelligent climate management.
Technical Specifications:
- VCE Size Code: 3434
- Outside Curb (W" x H"): 38 5/8" x 38 5/8"
- Rough Opening/Maximum Skylight Clearance (W" x H"): 37 1/2" x 37 1/2"
- Inside Curb (W" x H"): 34 1/2" x 34 1/2"
- Glass Type: Laminated LoĒ3 Glass (double-paned, argon-gas-filled)
- Power Source: Hardwired (110v), includes 20 ft wire
- Control: Battery-operated Radio-Frequency Remote Control
- Features: Integrated Rain Sensor, Included Insect Screen
- Noise Reduction: Up to 25% compared to standard double-pane glass
- Optional Upgrades: Impact Glass, White Laminated Glass
- Warranty: 20 years on glass, 10 years on product, 10-year installation warranty (with VELUX flashing kit), 5 years on shades and controls.
Concluding Statement: Elevate your home's comfort and appeal with the VELUX VCE 3434 electric fresh air skylight, providing a perfect blend of convenience, energy efficiency, and a healthier, brighter living environment.
VCE 3434 Sizing Dimensions | VCE 3434 |
Inside curb (W"xH") | 341⁄2 x 341⁄2 |
Outside curb (W"xH") | 371⁄2 x 371⁄2 |
Maximum skylight clearance (W"xH") | 385⁄8 x 385⁄8 |
Solar "Fresh Air" Skylight (VCE) - Curb Mounted
Want to compare Fresh Air, Curb Mount Skylights by size? See the table below!
VCE Size Code | 2222 | 2234 | 2246 | 3030 | 3046 | 3434 | 4646 |
---|---|---|---|---|---|---|---|
Inside curb (W"xH") | 22½ x 22½ | 22½ x 34½ | 22½ x 46½ | 30½ x 30½ | 30½ x 46½ | 34½ x 34½ | 46½ x 46½ |
Outside curb (W"xH") | 25½ x 25½ | 25½ x 37½ | 25½ x 49½ | 33½ x 33½ | 33½ x 49½ | 37½ x 37½ | 49½ x 49½ |
Maximum skylight clearance (W"xH") | 26⅝ x 26⅝ | 26⅝ x 38⅝ | 26⅝ x 50⅝ | 34⅝ x 34⅝ | 34⅝ x 50⅝ | 38⅝ x 38⅝ | 50⅝ x 50⅝ |
Add more control, comfort and security!


Curb Mount
A curb-mounted skylight is designed to sit on a raised curb structure built on the roof, making it a flexible option for both new installations and replacements.
Curb-mounted models are ideal for flat or low-slope roofs and can simplify installation—especially when replacing older units or working with thicker roofing materials.

Roof Pitch
Compatible with roof pitches from 0:12 to 20:12 (0° to 60°).
Ideal for flat and low-slope roofs, or where an existing curb is already in place. A great choice for retrofits, replacements, and homes with roofing materials like torch-down, TPO, modified bitumen, or tar & gravel.

Flashing
ECW Step Flashing – For use with shingle and shake roofs (minimum pitch 3:12). Designed to integrate with typical roofing profiles and provide weathertight protection around curb-mounted skylights.
EMW Metal Roof Flashing – Specifically made for standing seam and corrugated metal roofs, ensuring a custom fit and secure seal.
ECL Low-Profile Flashing – Suitable for low-slope and flat roofs, commonly used with membrane or rolled roofing systems.