Sentinel Totus Demand Energy Recovery Ventilation, D-ERV, is a new heat recovery demand ventilation system designed to meet modern building management control principles. It responds to the exact ventilation requirements of a room at any one time providing airflow only when it is required and to the level that is required - therefore using only the energy that is needed; no more no less, whilst recovering maximum energy from the extracted air and transferring it to the fresh supply air. This overcomes many of the issues encountered with a traditional fixed volume ventilation system that is either on or off irrespective of the occupancy of the room, risking over ventilation, burning valuable money and a wasteful use of energy.
The need to recover energy
The high efficiency cell incorporated within the Totus range achieves a market leading 90% efficiency (EN308 independently tested). This enables Sentinel Totus to recover 30% more energy, than a 70% efficient device. This high efficiency means that heating and cooling loads associated with 'extract to waste' type systems can be reduced by up to 25% in both heating and cooling seasons. The high efficiency also means that expensive after heaters, often required in lower efficiency heat recovery devices, are not required.
The need to save costs
Rising fuel prices are placing an increasing burden on organisations as they seek to reduce consumption.
- High efficiency heat exchanger - up to 90% energy recovery offering savings of up to 25% on heating and cooling loads
- Integral automatic summer bypass - provides free cooling during summer
- Double skin construction with high thermal acoustic insulation - 60kg/m³
- Low stand by power only 0.6W
- Energy efficient EC/DC motors - 1/3 less energy lost to heat than a conventional AC motor
The need for system integration
With the drive towards ‘whole building’ philosophy costing information, maintenance schedules and costs are all now essential elements of the project in addition to the initial capital costs. Sentinel Totus D-ERV incorporates a number of integrated features to offer maximum flexibility during design, build and operation including:
- Air conditioning interlock - to optimise energy recovery
- Heating system interlock - summer bypass optimisation
- Interfaces for BMS control and monitoring
- EC/DC motors with lower maintenance requirements and longer service life
- Plastisol coated case - suitable for external installation as standard
- Optional cowl for roof mounting
- Integral condensate pump - reduces installation costs and space requirements
- In-built automatic frost protection - prevents heat exchanger freezing at very low temperatures
- In-built backlit LCD user control interface which can be remotely mounted to suit site requirements
- Night time purge facility to reduce overheat during warm summer periods
The need for better health
Removal of pollutants, such as moisture, carbon dioxide and external fumes are all important factors in maintaining indoor air quality. Studies within schools have demonstrated that maintaining lower carbon dioxide levels helps create a better learning environment.
- Hierarchical control maintains CO2 levels within levels described in Building Bulletin 101
- Low sound levels meet requirements of Building Design
- Automatic summer bypass providing free summer cooling
- Demand control optimising indoor air quality
- Closed loop control system ensures maximum comfort levels at minimum energy levels
The need to meet legislation
Through the Energy Performance of Building Directive, the EU is aiming for over 20% saving in building energy consumption by 2010.
- Meets Building Regulations Part L2A and L2B - achieving a specific fan power at 25% of design flow rate no greater than that achieved at 100% design flow rate
- Market leading 90% heat exchange efficiency independently tested to EN 308
- Meets carbon footprint reduction targets
- Lowest Specific Fan Power figures of any D-ERV product
The need for energy recovery
Rising fuel prices are placing an increased burden on organisations as they seek to reduce consumption.
Sentinel Totus D-ERV incorporates a number of market leading technologies and control strategies to take commercial heat recovery ventilation to the next level and further reduce energy consumption and waste.
- Sentinel demand ventilation control - matching air quality with low power consumption using high efficiency, low energy EC/DC motor technology.
- Energy saving control functions:
- Automatic summer bypass - provides free cooling during summer
- Low standby power - 0.6 watts
- Night time purge facility - reducing air conditioning start up loads
- System interfaces - to optimise interface with environmental control systems.
- Air conditioning interlock - to maximise energy recovery opportunities
- Heating system interlock - to optimise summer bypass functionality
- BMS interfaces - control and monitoring
- High efficiency energy recovery cell
- Up to 90% energy recovery - reducing associated heating and cooling loads by up to 25%
- High efficiency eliminates the need for re-heaters eg. typically at -5°C ambient, 22°C room conditions the supply air temperature is maintained above 19°C.
