Sentinel D-Box Single Fan
Duct size 100 to 500mm
Performance - Airflow 0.01 to 1.6m3/s; Pressure up to 650Pa
Latest low energy EC/DC motors with Backward curved impellers
Sentinel demand ventilation fan controller with lockable isolator
Aluzinc contstruction suitable for Internal or External mounting
Performance tested to BS848 parts 1 & 2
Manufactured controlled to BS EN ISO 9001
The Sentinel single in-line duct fans are as supplied from Vent-Axia Ltd. Manufactured from Aluzinc, Sentinel fan units are internally treated with an ‘O’ class rated, BS476 part 6 & 7 acoustic foam which offers the benefits of high sound absorption, good thermal insulation properties, in addition to self extinguishing properties and resistance to ignition.
Weatherproof external units incorporate an additional controller shroud.
The casing includes an inclined inlet and bellmouth entry which directs the incoming air to the impeller with minimal turbulence. The result is better air management through the unit, less noise, higher efficiency and an increased performance.
The housing is designed to be as compact as possible for concealed false ceiling applications and Sentinel casings are specially designed to allow the unit to be mounted via its unique mounting bracket, ensuring a quick and easy solution to installation.
Impellers
All Sentinel units feature a low energy, Class 1, EC/DC external rotor motor and backward curved impeller assembly specifically chosen for performance and non-overloading characteristics. The assembly is dynamically balanced to DIN ISO 1940 Grade 6.3, duct size 500mm rated IP54, all other sizes IP44 according to BS EN 60529. Ball bearings are greased for life. Insulation is Class ‘B’ (from -25°C to +60°C). All models incorporate internal electronic overload protection and soft start function.
Electrical
Every Sentinel unit is fitted with a purpose designed common PCB controller incorporating a 16-character backlit alphanumerical x 2 line display with 4 button membrane keypad for fan status and commissioning set up. The enclosure is fitted with a 4-pole 10A isolator that is suitable for fitting a locking device to prevent accidental operation.
Motors are single phase 230V +/- 10% / 50/60Hz / 1ph (size 100- 400mm) or 400V +/- 10% / 50/60Hz / 3ph (size 500mm), (4 wire systems only).
24V DC power is provided from the controller for powering the matched range of Sentinel switches and sensors.
Performance/Sound
Extensively tested to BS848 parts 1 & 2. Published dB(A) figures are free field sound pressure levels at 3m with spherical propagation at reference level of 2 x 10-5 Pa. The inlet/outlet sound power level spectra figures are dB with a reference of 10–12 Watts.
Weatherproof Typical Ordering Designation
Ordering codes are similar to existing units with Suffix…. /WP which denotes Weatherproof.
Example: SENT100S/CP/WP
Accessories
For duct accessories see Ducting and Fitting Section.
Click here for technical information, within our Online Product Selector. After, select your required fan model from the list to display Performance, Sound, Dimensions and Electrical Data.
DIMENSIONS:
| Hierarchy Model | Constant Pressure Model | a | b | c | d | e | f | g | h | Weight Kg |
| 100S | 100S/CP | 380 | 443 | 100 | 275 | 400 | 192 | 306 | 62 | 8.5 |
| 125S | 125S/CP | 380 | 443 | 125 | 275 | 400 | 192 | 306 | 62 | 8.5 |
| 150S | 150S/CP | 380 | 443 | 150 | 275 | 400 | 192 | 306 | 62 | 8.5 |
| 200S | 200S/CP | 435 | 531 | 200 | 330 | 453 | 287 | 360 | 60 | 12.5 |
| 250S | 250S/CP | 435 | 531 | 250 | 330 | 453 | 287 | 360 | 35 | 13 |
| 315S | 315S/CP | 710 | 808 | 315 | 540 | 661 | 458 | 568 | 43 | 34 |
| 400S | 400S/CP | 710 | 808 | 400 | 540 | 661 | 458 | 568 | 43 | 36 |
| 500S | 500S/CP | 898 | 996 | 500 | 735 | 858 | 577 | 765 | 59 | 55 |
Humidity Control is automatic and can be set to switch between 65 and 90%RH. An integral pullcord provides a manual override function if required. Can be wired for either ON/OFF or Trickle Boost operation. Set Point adjustable. Maximum switching load 1 amp inductive. Pullcord override indicator Ambient operating temperature 0°C to +40°C. Dimensions:87 x 87 x 33mm (H x W x D). Supply voltage 24V DC SELV. Humidity sensors should be sited approx. 100mm below ceiling level and not above cupboards, refer to siting details in fitting and wiring instructions supplied with product.
Automatically reacts to the deterioration of air quality, sensing tobacco smoke, smells and toilet odours to regulate mechanically ventilated areas, such as cinemas, pubs, clubs, restaurants, kitchens, toilets and conference rooms. The sensor switches when the air quality declines below an adjustable preset level. This is registered by a self-cleaning ceramic sensing head. The air quality sensor should not be used for the detection of combustible gases. Ambient operating temperature range 0°C to +50°C. MIN - MAX mode or direct Damper control. Dimensions:87 x 157 x 47mm (H xWxD) Surface mounted. 1 - 25 min O/R timer. Supply voltage 24V DC SELV.
A wall or ceiling person presence detector for use with Sentinel. Can be used in MIN - MAX mode or for direct damper control. Fits any UK single gang mounting box. Adjustable timer overrun (5-25 minutes). Range of detection up to 10 metres. Designed to meet IP43. Ambient operating temperature range 0°C to +50°C. Supply voltage 24V DC SELV.
Provides infinitely variable Sentinel fan speed control between the 2 set points in Proportional mode. This control does NOT provide an ON/OFF switching facility. Manual control. located remotely. 24V DC SELV. Ambient operating temperature -5°C to +40°C. Dimensions:84 x 84 x 30mm (H x W x D). Will fit single gang box for surface mounting.
High CO2 levels promote increased fatigue and reduced concentration. Sensor monitors CO2 level in extract ducts from conference areas, offices, theatres etc. With Sentinel in Proportional control mode, air extraction rate tracks the CO2 level to improve indoor air quality. 24V DC SELV, 0 - 2000ppm CO2 working range. Auto-calibrating NDIR absorption sensor. Stable drift compensation. Adjustable probe length. IP Rating 65.
HVAC temperature and carbon dioxide room sensor for ventilation control of residential areas, office areas and classrooms. Used with Sentinel in Proportional control mode. Sensor will monitor both CO2 and temperature levels between the set points, the Sentinel air extraction rate will follow the higher of the 2 outputs. 24V DC SELV. 0 - 2000ppm CO2 working range. 0 - 50°C Temperature working range. Auto-calibrating NDIR CO2 absorption sensor. Thin film platinum temperature sensor for high accuracy. Dimensions:100 x 84 x 25mm (H x W x D).
This Remote Display unit will indicate the running status and condition of the fan or fans. Can be used in all Sentinel operating modes for fan mounting. 24V DC SELV. Directly connects into the Sentinel Control Unit. Used for single and twin fan mounting. Ambient operating temperature -5°C to +50°C. Dimensions:86 x 86 x 28mm (H x W x D).
PIR grille is on extract grille with an integral flap damper. Suitable for bathrooms and WC’s. The PIR function fully opens the damper when a person presence is detected. The opening time is fixed at 20 mins. Spigot size is 125mm. 12V AC SELV unit using the main transformer unit supplied. Integral PIR person presence sensor controlling damper - 100° viewing angle. Autohumidity control damper response at all times. Temperature range 0 - 50°C . Size: 158 x 150 x 35mm (H x W x D). MAX airflow 70m3/hr @100 Pa.
For those situations where a separate 24V DC SELV supply source is required. (Will power up to 5 Sentinel Dampers) 24W output capacity.
Humidity Sensor control is fixed at 72 - 75%RH. Incorporates a night time ‘set back’ function to avoid nuisance tripping as the humidity
level rises when the air cools. An integral pullcord provides a manual override function if required. Can be wired for either On/Off or Trickle/Boost operation. Pullcord override and neon indicator. Changeover relay switch. Operating range: 30% - 90%RH. Ambient operating temperature +5°C to +40°C. 24V DC SELV. Dimensions:87 x 87 x 33mm (H x W x D). Will fit single gang box for surface mounting.
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ESTIMATED RUNNING COSTS
Calculate estimated running costs for this product using the tool below.
For average costs*, leave the default values in place or enter your own figures in the boxes to recalculate.
Where a product has multi speeds, a typical installation has been used for the below calculations. *Running cost does not include the use of the heater on the heater model
Based on the inputted figures, estimated running costs would be:
Overview
The Sentinel single in-line duct fans are as supplied from Vent-Axia Ltd. Manufactured from Aluzinc, Sentinel fan units are internally treated with an ‘O’ class rated, BS476 part 6 & 7 acoustic foam which offers the benefits of high sound absorption, good thermal insulation properties, in addition to self extinguishing properties and resistance to ignition.
Weatherproof external units incorporate an additional controller shroud.
The casing includes an inclined inlet and bellmouth entry which directs the incoming air to the impeller with minimal turbulence. The result is better air management through the unit, less noise, higher efficiency and an increased performance.
The housing is designed to be as compact as possible for concealed false ceiling applications and Sentinel casings are specially designed to allow the unit to be mounted via its unique mounting bracket, ensuring a quick and easy solution to installation.
Impellers
All Sentinel units feature a low energy, Class 1, EC/DC external rotor motor and backward curved impeller assembly specifically chosen for performance and non-overloading characteristics. The assembly is dynamically balanced to DIN ISO 1940 Grade 6.3, duct size 500mm rated IP54, all other sizes IP44 according to BS EN 60529. Ball bearings are greased for life. Insulation is Class ‘B’ (from -25°C to +60°C). All models incorporate internal electronic overload protection and soft start function.
Electrical
Every Sentinel unit is fitted with a purpose designed common PCB controller incorporating a 16-character backlit alphanumerical x 2 line display with 4 button membrane keypad for fan status and commissioning set up. The enclosure is fitted with a 4-pole 10A isolator that is suitable for fitting a locking device to prevent accidental operation.
Motors are single phase 230V +/- 10% / 50/60Hz / 1ph (size 100- 400mm) or 400V +/- 10% / 50/60Hz / 3ph (size 500mm), (4 wire systems only).
24V DC power is provided from the controller for powering the matched range of Sentinel switches and sensors.
Performance/Sound
Extensively tested to BS848 parts 1 & 2. Published dB(A) figures are free field sound pressure levels at 3m with spherical propagation at reference level of 2 x 10-5 Pa. The inlet/outlet sound power level spectra figures are dB with a reference of 10–12 Watts.
Weatherproof Typical Ordering Designation
Ordering codes are similar to existing units with Suffix…. /WP which denotes Weatherproof.
Example: SENT100S/CP/WP
Accessories
For duct accessories see Ducting and Fitting Section.
Technical
Click here for technical information, within our Online Product Selector. After, select your required fan model from the list to display Performance, Sound, Dimensions and Electrical Data.
DIMENSIONS:
| Hierarchy Model | Constant Pressure Model | a | b | c | d | e | f | g | h | Weight Kg |
| 100S | 100S/CP | 380 | 443 | 100 | 275 | 400 | 192 | 306 | 62 | 8.5 |
| 125S | 125S/CP | 380 | 443 | 125 | 275 | 400 | 192 | 306 | 62 | 8.5 |
| 150S | 150S/CP | 380 | 443 | 150 | 275 | 400 | 192 | 306 | 62 | 8.5 |
| 200S | 200S/CP | 435 | 531 | 200 | 330 | 453 | 287 | 360 | 60 | 12.5 |
| 250S | 250S/CP | 435 | 531 | 250 | 330 | 453 | 287 | 360 | 35 | 13 |
| 315S | 315S/CP | 710 | 808 | 315 | 540 | 661 | 458 | 568 | 43 | 34 |
| 400S | 400S/CP | 710 | 808 | 400 | 540 | 661 | 458 | 568 | 43 | 36 |
| 500S | 500S/CP | 898 | 996 | 500 | 735 | 858 | 577 | 765 | 59 | 55 |
Accessories
Humidity Control is automatic and can be set to switch between 65 and 90%RH. An integral pullcord provides a manual override function if required. Can be wired for either ON/OFF or Trickle Boost operation. Set Point adjustable. Maximum switching load 1 amp inductive. Pullcord override indicator Ambient operating temperature 0°C to +40°C. Dimensions:87 x 87 x 33mm (H x W x D). Supply voltage 24V DC SELV. Humidity sensors should be sited approx. 100mm below ceiling level and not above cupboards, refer to siting details in fitting and wiring instructions supplied with product.
Automatically reacts to the deterioration of air quality, sensing tobacco smoke, smells and toilet odours to regulate mechanically ventilated areas, such as cinemas, pubs, clubs, restaurants, kitchens, toilets and conference rooms. The sensor switches when the air quality declines below an adjustable preset level. This is registered by a self-cleaning ceramic sensing head. The air quality sensor should not be used for the detection of combustible gases. Ambient operating temperature range 0°C to +50°C. MIN - MAX mode or direct Damper control. Dimensions:87 x 157 x 47mm (H xWxD) Surface mounted. 1 - 25 min O/R timer. Supply voltage 24V DC SELV.
A wall or ceiling person presence detector for use with Sentinel. Can be used in MIN - MAX mode or for direct damper control. Fits any UK single gang mounting box. Adjustable timer overrun (5-25 minutes). Range of detection up to 10 metres. Designed to meet IP43. Ambient operating temperature range 0°C to +50°C. Supply voltage 24V DC SELV.
Provides infinitely variable Sentinel fan speed control between the 2 set points in Proportional mode. This control does NOT provide an ON/OFF switching facility. Manual control. located remotely. 24V DC SELV. Ambient operating temperature -5°C to +40°C. Dimensions:84 x 84 x 30mm (H x W x D). Will fit single gang box for surface mounting.
High CO2 levels promote increased fatigue and reduced concentration. Sensor monitors CO2 level in extract ducts from conference areas, offices, theatres etc. With Sentinel in Proportional control mode, air extraction rate tracks the CO2 level to improve indoor air quality. 24V DC SELV, 0 - 2000ppm CO2 working range. Auto-calibrating NDIR absorption sensor. Stable drift compensation. Adjustable probe length. IP Rating 65.
HVAC temperature and carbon dioxide room sensor for ventilation control of residential areas, office areas and classrooms. Used with Sentinel in Proportional control mode. Sensor will monitor both CO2 and temperature levels between the set points, the Sentinel air extraction rate will follow the higher of the 2 outputs. 24V DC SELV. 0 - 2000ppm CO2 working range. 0 - 50°C Temperature working range. Auto-calibrating NDIR CO2 absorption sensor. Thin film platinum temperature sensor for high accuracy. Dimensions:100 x 84 x 25mm (H x W x D).
This Remote Display unit will indicate the running status and condition of the fan or fans. Can be used in all Sentinel operating modes for fan mounting. 24V DC SELV. Directly connects into the Sentinel Control Unit. Used for single and twin fan mounting. Ambient operating temperature -5°C to +50°C. Dimensions:86 x 86 x 28mm (H x W x D).
PIR grille is on extract grille with an integral flap damper. Suitable for bathrooms and WC’s. The PIR function fully opens the damper when a person presence is detected. The opening time is fixed at 20 mins. Spigot size is 125mm. 12V AC SELV unit using the main transformer unit supplied. Integral PIR person presence sensor controlling damper - 100° viewing angle. Autohumidity control damper response at all times. Temperature range 0 - 50°C . Size: 158 x 150 x 35mm (H x W x D). MAX airflow 70m3/hr @100 Pa.
For those situations where a separate 24V DC SELV supply source is required. (Will power up to 5 Sentinel Dampers) 24W output capacity.
Humidity Sensor control is fixed at 72 - 75%RH. Incorporates a night time ‘set back’ function to avoid nuisance tripping as the humidity
level rises when the air cools. An integral pullcord provides a manual override function if required. Can be wired for either On/Off or Trickle/Boost operation. Pullcord override and neon indicator. Changeover relay switch. Operating range: 30% - 90%RH. Ambient operating temperature +5°C to +40°C. 24V DC SELV. Dimensions:87 x 87 x 33mm (H x W x D). Will fit single gang box for surface mounting.
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