Product Reference: SDP-MD-50

Dome Smoke Vent

The SDP polycarbonate dome smoke vent is designed for smoke ventilation, daily ventilation, and roof access on commercial and industrial buildings. Offered in standard sizes from 35.4 x 35.4 in. to 65.0 x 65.0 in. (900 x 900 mm to 1650 x 1650 mm), it combines a thermally broken frame, insulated aluminum upstand, and triple polycarbonate dome for dependable performance.

Product features:

Documented EN 12101-2 smoke-vent test data
Thermal break to help improve insulation
2 in. (50 mm) insulation options with approximate U-factors of 0.11 for mineral wool and 0.08 for PIR
Suitable for installation on roof pitches up to 15°
Custom dimensions and optional powder coating

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Product Resources

At Surespan, we are dedicated to providing you with the latest and most effective tools for your construction and design needs. Our regularly updated resources ensure that you always have access to the best solutions available. Whether you’re planning a new residential, commercial, or industrial project, our extensive range of roof hatches, floor access doors, and premium skylights can be customized to meet your specific requirements.

Technical Submittal Pack

Download a zip file containing all documents for this product.

Product Datasheet
Fitting Instructions
Submittal Drawings (PDF)
Submittal Drawings (DWG)

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Performance Standards

Standard Sizes

Available in standard sizes from 35.4 x 35.4 in. to 65.0 x 65.0 in. (900 x 900 mm to 1650 x 1650 mm).

Thermally Broken

A thermally broken lid and upstand are provided as standard to help reduce heat transfer.

Powder Coating

Optional powder coating is available to improve durability and coordinate with the building exterior.

External Curb Liner

The aluminum curb liner encloses the insulation and provides a durable outer finish around the upstand.

Electric Operation

Electric operation is available through a 24V control box, smoke detector interface, ventilation switch, IP40 fire switch, and 24V DC actuator.

Insulation Options

Insulated upstand options include a thermally broken build-up with mineral wool or PIR insulation depending on specification.

Snow Loading

Can be engineered for significant snow loading where local conditions require it.

Resistance To Wind Loads

Documented EN 12101-2:2003 wind load test data supports dependable operation in adverse weather.

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your questions answered

Common questions

What makes the polycarbonate dome smoke vent suitable for multiple building types?

The triple-layer polycarbonate dome provides impact resistance and daylight transmission, making the unit suitable for a wide range of commercial and industrial applications.

How does insulation contribute to performance?

Insulated upstand options help reduce heat transfer through the assembly. Depending on the insulation selected, approximate thermal performance can reach U-factor 0.11 with mineral wool or 0.08 with PIR, equivalent to R-values of about 9 and 13 respectively.

What operation and safety features are included?

The unit is operated by a 24V DC actuator and includes a continuous hinge and double seals to support reliable day-to-day and emergency operation.

Can the dome smoke vent be customized?

Yes. The dome smoke vent can be supplied in a range of sizes and can be paired with accessories such as guard rails and ladder access to suit the project requirements.

Enhanced Safety Options

Safety Products

Surespan offers accessory safety products to support smoke vent installations, including SureGuard hatch railings for perimeter protection, handholds for safer entry and exit, and Ladder-Up posts for controlled vertical access. These options help improve user safety around the roof opening during inspection and maintenance.

Enhanced Access Options

Ladder Access

Smoke vent access systems can be paired with several ladder configurations to suit the building layout. Standard vertical ladders provide direct access, while companionway or ship ladders offer a shallower climbing angle. ZIP retractable ladders are useful where space efficiency is a priority.