Vent-Axia Energysaver IVDC Vertical Discharge Roof Extract Fan
Product Brochure and Technical Overview
Introduction
The Energysaver IVDC is a high-performance, energy-efficient vertical discharge roof extract fan designed for non-residential sectors. It features advanced EC/DC motor technology for optimal performance and reduced energy consumption.
[Image: A Vent-Axia Energysaver IVDC fan unit is shown alongside a modern office interior with a suspended ceiling and lighting.]
Features & Benefits
- Low Energy Consumption EC/DC Motors: Up to 50% more efficient than conventional AC Motors.
- Maintenance Free Motors.
- High Air Volume: Up to 0.91 m³/s.
- Motor Insulation Class F with Hotspot Protection.
- Wide Operating Temperature Range: Up to +40°C.
- 3 Year Warranty.
- Quality Assurance: Manufactured to BS EN ISO 9001:1994 standards.
- Performance Tested: Compliant with BS848 Part 1 1980.
Product Description
The Energysaver IVDC range, supplied by Roof Units, is engineered around a high-performance centrifugal impeller and a 48-volt EC/DC external rotor motor, delivering an efficient roof extract ventilation solution. The units are constructed from Plastisol coated prime quality galvanised sheet steel, providing a robust casing suitable for various environmental conditions, including coastal areas. The casing design, combined with the quiet EC/DC motor, ensures low sound levels.
Available in four sizes, the Energysaver IVDC offers air volumes from 0.09 m³/s to 0.97 m³/s (190 cfm to 2055 cfm) and pressure development up to 500 Pa (1.6 w.g.). Advanced computer modelling has resulted in one of the most compact vertical discharge roof extract fans. Each unit features an integral bellmouth to streamline airflow into the impeller, optimizing performance and minimizing energy consumption.
State Of The Art EC/DC Energysaver Control
The integrated electronics of the Energysaver IVDC provide advanced control functions:
- Speed Control: Continuously variable via a linear 0-10V DC or PWM input signal, offering direct proportional speed control and significant power reduction while maintaining high efficiency.
- Integrated Soft Start: Prevents high inrush currents, protecting the motor and electrical system.
- Closed Loop Speed Control: Optional control based on external parameters or open control, selectable via DIP-switch.
- Day/Night Setback Facility Control.
- Pressure Sensing Facility: Units are pre-fitted with a pressure transmitter to provide constant pressure ventilation, automatically adjusting motor speed based on duct pressure.
- Alarm Functions.
- RS485 Interface Facility.
All units include starting limitation, reverse polarity protection, phase-to-phase and phase-to-earth short circuit protection, and HOT SPOT protection as standard. Specialist software is available for PC connection for detailed setting, monitoring, automatic pressure control, and error analysis.
Impellers and Motors
The impellers are aerodynamically designed backward curved centrifugal types, computer-matched with the EC/DC external rotor motor. They are factory balanced to ISO 1940 G6.3 for quiet, vibration-free operation. Blades and motor housing are made from sheet steel or polyamid.
Motors are suitable for 230V / 1 phase / 50 Hz or 60 Hz supply via the built-in controller. They are protected to IP42, comply with BS EN 60034-5, and feature Class F insulation for operation between -15°C and +40°C. Motors are wound for a 48-volt electrical supply from the main controller.
Terminal Box
All models include an externally mounting Isolator protected to IP55, ensuring suitability for external installation.
Performance and Quality Assurance
Fan performance is tested in accordance with BS848 Part 1 1980, and sound levels are measured in a reverberant chamber according to BS848 Part 2 1985. Design and manufacture adhere to BS EN ISO 9001 quality management system standards.
Dimensions
[Diagram: Illustration showing the dimensions of the Energysaver IVDC fan units with labels A through H.]
| Stock Ref | A | B | C | D | E | F | G | H | Weight kg |
|---|---|---|---|---|---|---|---|---|---|
| IVDC5 | 380 | 292 | 450 | 550 | 40 | 251.5 | 342 | 242 | 12 |
| IVDC10 | 460 | 330 | 495 | 730 | 40 | 300 | 380 | 280 | 15 |
| IVDC20 | 580 | 450 | 615 | 775 | 40 | 375 | 500 | 400 | 17 |
| IVDC30 | 665 | 535 | 700 | 820 | 40 | 375 | 585 | 485 | 20 |
Performance Data
[Graph: Performance curve illustrating airflow (m³/s and cfm) versus static pressure (Pa and ins. w.g.) for different fan operating points.]
| Stock Ref | Nom. RPM | Volt | Motor Ref. | kW | Amps FLC | dBA @ 3m |
|---|---|---|---|---|---|---|
| IVDC5 | 3100 | 1ph | 1 | 0.26 | 0.10 | 53 |
| IVDC10 | 1700 | 1ph | 2 | 0.57 | 0.13 | 57 |
| IVDC20 | 1500 | 1ph | 3 | 0.79 | 0.18 | 58 |
| IVDC30 | 1300 | 1ph | 4 | 0.97 | 0.28 | 53 |
Current Draw at Various Airflows
| Air Volume (m³/s) | IVDC5 Amps FLC | IVDC10 Amps FLC | IVDC20 Amps FLC | IVDC30 Amps FLC |
|---|---|---|---|---|
| 0.00 | 0.26 | 0.57 | 0.79 | 0.97 |
| 0.25 | 0.16 | 0.33 | 0.49 | 0.60 |
| 0.45 | 0.02 | 0.58 | 0.80 | 0.13 |
Note: Detailed current draw (Amps FLC) at intermediate air volumes is available.
Contact and Support
For technical, installation, and sales advice, please contact Vent-Axia:
Industrial Sales Centre
Export Sales Tel: (+44) 1293 441 672
Export Sales Fax: (+44) 1293 552 552
Web: www.vent-axia.com
Email: export@vent-axia.com
All sales are subject to Vent-Axia Limited's Conditions of Sale, available upon request. Vent-Axia reserves the right to alter specifications without notice as part of its continuous product improvement policy.
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Vent-Axia Group Ltd is a British company supporting British manufacturing, providing the right products at the right price.
