AOV Roof Vents
VentecAOV OSTRO
140° opening single-leaf natural smoke ventilator up to 2.5m² GFA. For flat and pitched roofs. EN 12101-2 certified with 24V actuator. Vent Trade.
- up to 2.5m²
- Roof 140° opening
- 24v
- Poly, insulated or dome
Why Choose the Ventec VELO
Smoke Ventilation
Fully tested and certified to BS EN 12101-2 for smoke extraction. Reliability rated Re 1000 for smoke extraction duty with opening time under 60 seconds.
Energy Efficiency
Overall U-value as low as 1.9 W/m² K with double-glazed blades. Thermally broken frames with argon-gas filled cavity and low-E glass for exceptional thermal performance.
Dual Purpose
Delivers both daily environmental ventilation (Re 10000 rated) and emergency smoke control in a single unit, reducing the number of facade openings required.
Anti Finger-Trapping
Motor is programmed with an anti finger-trapping safety function, preventing injury during louvre blade operation.
Smooth Operation
Louvre blades rotate on pivot bearings connected to a rack and pinion mechanism, ensuring smooth and synchronized blade movement up to 85° opening angle.
BS EN 12101-2 Certified
Fully tested and certified for smoke and heat exhaust ventilation systems to the UK national standard. Reliability rated Re 1000 for smoke extraction.
Dual Purpose
Delivers both daily environmental ventilation (Re 10000 rated) and emergency smoke control in a single unit.
Press-Formed Mitred Corners
Precision press-formed mitred corner joints create an enhanced, refined visual appearance suitable for architectural applications.
Next Day Despatch
Standard sizes available for rapid despatch from stock: keeping your project on schedule.
32mm Double Glazing
Standard blade option with 6mm laminated outside, 20mm argon-gas cavity, 6.38mm laminated low-E inside. Black warm edge cavity spacer.
32mm Triple Glazing
Premium blade option for enhanced thermal and acoustic performance. Low U-values for energy-efficient building envelopes.
Insulated Aluminium Panels
Alternative blade option for applications where glazing is not required. Robust aluminium panels with thermal insulation.
EPDM Gaskets
All blade options include EPDM gaskets for weather-tight sealing. Louvre blades sit flush with the external frame when closed.
Low U-Values
Overall thermal transmittance as low as 1.9 W/m² K. Glazing U-value of 1.1 W/m² K with argon-gas filled cavity and low-E glass.
Thermally Broken Frame
Thermally broken extruded aluminium frames reduce heat transfer. Designed to support sustainable building design and improved thermal comfort.
Double Polypropylene Seal
Double polypropylene brush draught seal for class-leading low air permeability, reducing unwanted air infiltration and energy loss.
Key Features
Thermally Broken
U-value as low as 1.1 W/m²K with argon-gas filled double or triple glazed blades and thermally broken aluminium frames for exceptional energy performance.
Dual Purpose
Rated Re 10000 for daily environmental ventilation and Re 1000 for emergency smoke extraction, reducing the number of facade openings required.
Bespoke Sizing
Available from 350mm x 350mm up to 2500mm x 6000mm, with standard sizes available for next day despatch.
Anti Finger-Trapping
Motor is programmed with an anti finger-trapping safety function, preventing injury during louvre blade operation.
Choose Your Configuration
1.04m² GFA
Standard Frame
4-blade louvre window. 1150mm(W) x 1250mm(H). 286mm blade height. Aerodynamic free area 0.68m². Weight 47 kg.
1.5m² GFA
Large Frame
6-blade louvre window. 950mm(W) x 2100mm(H). 331mm blade height. Aerodynamic free area 0.94m². Weight 67 kg.
Bespoke
Custom Sizes
Min 350mm(W) x 350mm(H), max 2500mm(W) x 6000mm(H). Non-standard sizes available on request: may not be compliant with BS EN 12101.
Certifications & Compliance
BS EN 12101-2
Certified for smoke and heat exhaust ventilation systems. Independently tested and verified for UK smoke ventilation standards.
Re 1000 / Re 10000
Reliability rated Re 1000 for smoke extraction operations and Re 10000 for daily environmental ventilation duty cycles.
B 300 Fire Resistance
Resistance to temperatures up to 300°C. Fire-rated for compliance with building safety regulations.
Need Some Help?
We have a team of ventilation specialists on hand to help guide you towards selecting and customising your system.
Call us: 01202 725 485
Email us: info@vent-trade.co.uk
Technical Specifications
Performance
- Geometric Free Area: 1.04m² / 1.5m²
- Aerodynamic Free Area: 0.68m² / 0.94m²
- Certification: BS EN 12101-2
- Vent Opening Angle: 0 – 85°
- Opening Time: < 60 seconds
- Reliability (Smoke): Re 1000
- Reliability (Daily): Re 10000
- Resistance Temp High: B 300 E
Electrical
- Operating Voltage: 24Vdc
- Current Consumed: Max 0.85 amps
- Actuator: D+H LDF 100/70-RL
- Actuator Mount: Internal top right of side-frame
- Tractive Force: 800N
- Cable Cores: 2 Core + Earth
- Operating Temp: -5°C to 50°C
Physical
- Standard Size (4-blade): 1150mm x 1250mm
- Standard Size (6-blade): 950mm x 2100mm
- Max Size: 2500mm(W) x 6000mm(H)
- Min Size: 350mm(W) x 350mm(H)
- Blade Height: 200mm – 450mm
- Glazing: 6mm laminated + 20mm argon cavity + 6.38mm laminated low-E
- U-value (Glazing): 1.1 W/m² K
- U-value (Overall): 1.9 – 2.0 W/m² K
- Finish: RAL 9010 matt (other RAL colours on request)
Downloads & Resources
Documents
Data SheetRelated Products
Smoke Control
VentecO Range 7 Smoke Control Panel
Certified smoke control panel for single stairwell to 60-zone networked systems. 24V 7A output with 72-hour battery backup. EN 12101-10 compliant.
- Golden Thread ready
- Zonal lockout
- 1 to 60 zones
- Built-in anti-trap protection
- Secure configuration
AOV Roof Vents
VentecAOV OSTRO Access
140° opening smoke ventilator with roof access capability up to 2.5m² GFA. Offset 24v actuator for safe maintenance access. BS EN 12101-2 certified 140° opening
- up to 2.5m²
- Roof 140° opening
- 24v
- Poly, insulated or dome