Vent-Axia Sentinel Kinetic F & FH Compatible Replacement Filter Set - G3
409764
£14.50
MVHR unit guide
Vent-Axia Sentinel Kinetic F and FH: specifications, filters & guide
MVHRVent-Axia
The Vent-Axia Sentinel Kinetic F and FH are wall-mounted MVHR units; the FH adds a summer bypass and an integral humidity sensor.
- Summer bypass
- Evening and night-time purge
- Integral humidity sensor
- Acoustic enclosure and top box
- Frost protection
About the Vent-Axia Sentinel Kinetic F and FH
The Sentinel Kinetic F and FH are wall-mounted mechanical ventilation with heat recovery (MVHR) units made by Vent-Axia. They run continuously, drawing stale, moist air from bathrooms, toilets and kitchens and passing it through a heat exchanger that transfers heat to the fresh air supplied to bedrooms and living areas. They are intended for houses and similar dwellings under the 2010 edition of Approved Document F. For the FH, the ErP product fiche gives a thermal efficiency of 90% and an energy class of SEC A+.
The FH has a summer bypass, a damper that sends outdoor air around the heat exchanger when the house is warmer than the indoor temperature set on the controller and the air outside is cooler, and an integral humidity sensor that raises fan speed as relative humidity rises. It is made as a right-hand unit (408167) and a left-hand unit (408169), each also available with an acoustic enclosure, an acoustic top box or both. The casing is 550 mm high, 555 mm wide and 350 mm deep, weighs 19 kg and has 125 mm duct spigots.
Ducting can leave the unit vertically, horizontally or both. Fan speeds are set at commissioning, with factory defaults of 20% (low), 30% (normal), 50% (boost) and 100% (purge) of maximum flow. Boost can come from the front button, a wireless switch, a light switch, a sensor or a 0-10 V input, and the integrated digital controller offers BMS connectivity, volt-free inputs and an adjustable delay-on and delay-off timer. Once commissioned, the unit should need no day-to-day intervention.
Two removable filters sit behind flap panels on the casing and protect the heat recovery cell. They are ISO 45% Coarse (G3) as standard, 184 x 328 mm, and an ISO ePM10 50% (M5) grade is the optional finer alternative. The control unit shows a Check filters reminder at the interval set during commissioning, because filters that become too dirty restrict airflow or let dirt pass through to the heat exchanger. Part numbers, the filter change procedure, maintenance intervals and fault codes are set out below.
Key specs
- Max. flow rate (FH, ErP product fiche)
- 331.2 m³/h
- Max. airflow at 100 Pa
- 79 l/s (284.4 m³/h)
- Thermal efficiency (FH, ErP product fiche)
- 90%
- Specific power input, SPI (FH)
- 0.30 W/(m³/h)
- Default airflow settings
- Low 20%, Normal 30%, Boost 50%, Purge 100% of maximum flow
- Ambient temperature limits for installation
- Not above 40 °C and not below -20 °C
- Operating humidity
- 0% to 95% RH
- Storage temperature
- -20 °C to +45 °C
- Height (excluding spigots)
- 550 mm
- Width (excluding spigots)
- 555 mm
- Depth
- 350 mm
- Weight
- 19 kg
- Maintenance access area
- 360 mm x 560 mm
- Acoustic top box weight
- 11 kg
- Acoustic enclosure weight
- 19 kg
- Supply
- 220-240 V AC, single phase, 50 Hz
- Max. power input at max. flow rate (FH, ErP product fiche)
- 168 W
- Supply fuse
- 3 A, located in the fused spur
- Product fuse
- 2 A, on the main PCB
- IP rating
- IP22
- Spigot diameter
- 125 mm
- Condensate pipe diameter
- 22 mm
- Standard filters
- 2 x ISO 45% Coarse (G3), part no. 409764 (pack of 2)
- Optional finer filter
- ISO ePM10 50% Pollen (M5), part no. 472153 (single)
- Filter size
- 184 x 328 mm
- Control unit
- LCD display with four buttons
- Summer bypass and integral humidity sensor
- FH
- Sound power level LWA (FH, ErP product fiche)
- 61.03 dB
- Energy class (FH)
- SEC class A+
- Regulations and listings
- Building Regulations ADF and ADL compliant; recognised in SAP PCDB
Replacement filters for the Vent-Axia Sentinel Kinetic F and FH
Vent-Axia Sentinel Kinetic F & FH Compatible Replacement Filter Set - G4
£15.75
Vent-Axia Sentinel Kinetic F & FH Compatible Replacement Filter Set - M5
472153
£18.50
How to change the filters
- Wait for the Check filters message
The display shows Check filters at the interval set at commissioning. The filters are reached through the flap panels on the casing. Do not remove the unit's covers: mains voltage is present inside, and the unit must be switched off at the mains before any cover is removed.
- Open the filter flaps
Open the filter flaps and take out both filters.
- Clean or fit new filters
For a routine check, clean the filters gently by tapping them or by carefully using a vacuum cleaner. At a scheduled change, fit two replacement filters of 184 x 328 mm.
- Close the filter flaps
Close both filter flaps.
- Reset the reminder
Press and hold the up and down buttons on the control unit together for 5 seconds to clear the automatic message.
- Record the next change date
Note the date of the next required filter change on the filter check record provided with the unit.
Manuals & downloads
Other MVHR units
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Specifications
Performance
- Max. flow rate (FH, ErP product fiche)
- 331.2 m³/h
- Max. airflow at 100 Pa
- 79 l/s (284.4 m³/h)
- Thermal efficiency (FH, ErP product fiche)
- 90%
- Specific power input, SPI (FH)
- 0.30 W/(m³/h)
- Default airflow settings
- Low 20%, Normal 30%, Boost 50%, Purge 100% of maximum flow
- Ambient temperature limits for installation
- Not above 40 °C and not below -20 °C
- Operating humidity
- 0% to 95% RH
- Storage temperature
- -20 °C to +45 °C
Dimensions & weight
- Height (excluding spigots)
- 550 mm
- Width (excluding spigots)
- 555 mm
- Depth
- 350 mm
- Weight
- 19 kg
- Maintenance access area
- 360 mm x 560 mm
- Acoustic top box weight
- 11 kg
- Acoustic enclosure weight
- 19 kg
Electrical
- Supply
- 220-240 V AC, single phase, 50 Hz
- Max. power input at max. flow rate (FH, ErP product fiche)
- 168 W
- Supply fuse
- 3 A, located in the fused spur
- Product fuse
- 2 A, on the main PCB
- IP rating
- IP22
Connections & ducting
- Spigot diameter
- 125 mm
- Condensate pipe diameter
- 22 mm
Filters
- Standard filters
- 2 x ISO 45% Coarse (G3), part no. 409764 (pack of 2)
- Optional finer filter
- ISO ePM10 50% Pollen (M5), part no. 472153 (single)
- Filter size
- 184 x 328 mm
Controls & features
- Control unit
- LCD display with four buttons
- Summer bypass and integral humidity sensor
- FH
Acoustics
- Sound power level LWA (FH, ErP product fiche)
- 61.03 dB
Approvals & compliance
- Energy class (FH)
- SEC class A+
- Regulations and listings
- Building Regulations ADF and ADL compliant; recognised in SAP PCDB
Model variants
- Sentinel Kinetic FH Right 408167 and Left 408169
Right-handed or left-handed, with summer bypass and integral humidity sensor. - Sentinel Kinetic FH Right with acoustic options: 479532, 479531, 479530
479532 has the acoustic top box and enclosure, 479531 the top box only, 479530 the enclosure only. - Sentinel Kinetic FH Left with acoustic options: 479535, 479534, 479533
479535 has the acoustic top box and enclosure, 479534 the top box only, 479533 the enclosure only.
Vent-Axia Sentinel Kinetic F and FH part numbers
Unit models
| Part no. | Description |
|---|---|
408167 | Sentinel Kinetic FH Right, right-handed with summer bypass and integral humidity sensor |
408169 | Sentinel Kinetic FH Left, left-handed with summer bypass and integral humidity sensor |
479532 | Sentinel Kinetic FH Right with Acoustic Top Box & Enclosure |
479531 | Sentinel Kinetic FH Right with Acoustic Top Box |
479530 | Sentinel Kinetic FH Right with Acoustic Enclosure |
479535 | Sentinel Kinetic FH Left with Acoustic Top Box & Enclosure |
479534 | Sentinel Kinetic FH Left with Acoustic Top Box |
479533 | Sentinel Kinetic FH Left with Acoustic Enclosure |
Filters
| Part no. | Description | Notes |
|---|---|---|
409764 | ISO 45% Coarse (G3) filters, pack of 2, for Kinetic F and FH | Grade G3; pack of 2; 184 x 328 mm |
472153 | ISO ePM10 50% Pollen (M5) filter, single, for Kinetic F and FH | Grade M5; supplied singly; 184 x 328 mm |
Controls & sensors
| Part no. | Description | Notes |
|---|---|---|
443283 | Wired Remote Controller | 15 m of cable supplied |
441838 | Plug-in integral humidity sensor | |
441865 | Wireless enable kit | Wireless receiver and one wireless switch |
437827 | Additional wireless switch | Up to four can be connected |
441780 | Vent-Wise accessory pack | Requires sensors |
448356 | LED alarm with 15 m cable | |
447340 | Opto-Coupler | Gives a volt-free BMS connection |
442030 | Isolator relay controller | |
449060 | Normal Boost Switch with Light Indicator | Single gang, 85 x 85 x 10 mm (H x W x D) |
437320 | Normal Boost Switch, stainless steel | Single gang, brushed stainless steel, 90 x 90 x 18 mm (H x W x D) |
455213 | Normal Boost Switch | Single gang, 85 x 85 x 10 mm (H x W x D) |
448929 | Momentary Push Switch | Boosts the unit for 30 minutes; 85 x 85 x 10 mm (H x W x D) |
563550 | Ambient Response Humidity Sensor | 30%-90% RH operating range; 220-240 V AC |
563532 | Ecotronic Humidity Sensor | Adjustable set point; 220-240 V supply |
563506 | Air Quality Sensor | Surface mounted; 220-240 V supply |
459623 | Visonex PIR Sensor | Adjustable timer overrun 5-25 minutes; detection range up to 10 metres |
Accessories
| Part no. | Description |
|---|---|
477988 | Acoustic Purge Fan |
479829 | Acoustic Purge Fan XL |
68MP033G | Anti Vibration Mounts |
Spares
| Part no. | Description | Notes |
|---|---|---|
441768 | Main Power Board | |
441767 | Control Panel | |
443430 | Temperature sensor | |
443431 | Temperature sensor | |
409766 | Heat Recovery Cell | Listed for Sentinel Kinetic F |
409768 | Supply Motor | Listed for Sentinel Kinetic F |
409770 | Extract Motor | Listed for Sentinel Kinetic F |
409772 | Summer Bypass | Listed for Sentinel Kinetic F |
409774 | Spigot | One per pack; listed for Sentinel Kinetic F |
Maintenance schedule
| Task | How often |
|---|---|
| Check, clean or replace both filters In a new-build property the supply and extract filters should be checked at one-month intervals for the first six months. | When Check filters is displayed: 6 months urban, 9 months suburban, 12 months rural |
| Inspect and clean the unit and heat exchanger Isolate the mains supply, remove the front cover and both filters, slide out the heat exchanger and wash it and the outer cover in warm water with mild detergent, then dry thoroughly. Keep water away from all electrical components and wiring. | Every 12 months |
| Inspect the motors Look for dust or dirt on the impeller blades, which can cause imbalance and more noise. Vacuum or clean if necessary. | Every 12 months |
| Check the condensate drain Make sure the drain tube is secure and clear of debris; clean it if necessary. | Every 12 months |
| Check fastenings Check that the unit and wall-mount fastenings are tight and re-tighten any that have worked loose. | Every 12 months |
| Professional service The product should be professionally serviced every year. | Annually |
Performance & technical data
Sound data: Kinetic FH
| Speed | Path | 63 | 125 | 250 | 500 | 1k | 2k | 4k | 8k | LwA | SPL dB(A) @ 3 m |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 20% | Supply | 66.2 | 67.2 | 54.3 | 48.0 | 42.1 | 33.3 | 22.5 | 25.6 | 53.9 | 36.4 |
| 20% | Extract | 57.7 | 56.6 | 47.2 | 43.5 | 35.3 | 24.1 | 19.6 | 25.7 | 45.7 | 28.2 |
| 20% | Breakout | 41.2 | 47.0 | 41.7 | 39.5 | 34.6 | 30.4 | 22.5 | 25.7 | 41.0 | 20.5 |
| 40% | Supply | 68.9 | 66.4 | 68.8 | 57.8 | 52.1 | 44.9 | 35.3 | 28.8 | 62.4 | 44.9 |
| 40% | Extract | 66.8 | 56.1 | 56.9 | 52.1 | 44.7 | 34.6 | 23.8 | 25.8 | 53.2 | 35.7 |
| 40% | Breakout | 47.3 | 47.5 | 56.4 | 48.0 | 44.0 | 39.6 | 32.8 | 29.1 | 51.0 | 30.5 |
| 60% | Supply | 72.8 | 72.5 | 82.2 | 64.4 | 59.9 | 53.8 | 46.2 | 40.3 | 74.4 | 56.9 |
| 60% | Extract | 67.3 | 61.9 | 66.5 | 58.9 | 52.2 | 42.7 | 32.6 | 27.6 | 61.1 | 43.6 |
| 60% | Breakout | 53.9 | 53.2 | 65.9 | 55.8 | 52.2 | 48.2 | 42.5 | 39.3 | 61.0 | 40.5 |
| 80% | Supply | 85.0 | 75.3 | 72.5 | 77.9 | 65.3 | 58.8 | 52.1 | 47.4 | 76.0 | 58.5 |
| 80% | Extract | 83.5 | 65.2 | 65.0 | 65.5 | 57.0 | 47.7 | 37.9 | 31.3 | 65.5 | 48.0 |
| 80% | Breakout | 56.4 | 56.4 | 60.4 | 69.8 | 56.7 | 53.2 | 47.8 | 42.0 | 66.5 | 46.0 |
| 100% | Supply | 95.5 | 77.7 | 74.0 | 80.4 | 68.7 | 62.9 | 56.9 | 52.4 | 79.1 | 61.6 |
| 100% | Extract | 83.3 | 68.3 | 66.9 | 71.2 | 60.7 | 51.4 | 42.4 | 36.1 | 69.7 | 52.2 |
| 100% | Breakout | 62.1 | 59.7 | 62.9 | 70.0 | 61.0 | 57.3 | 52.3 | 46.9 | 68.0 | 47.5 |
Unit only. Octave band values in dB SWL. Tested to BS EN 13141-7:2010. Breakout quoted spherical; supply and extract quoted hemispherical. Speed is a percentage of maximum fan speed.
Sound data: Kinetic FH with acoustic solution
| Speed | Path | 63 | 125 | 250 | 500 | 1k | 2k | 4k | 8k | LwA | SPL dB(A) @ 3 m |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 20% | Supply | 58.2 | 62.1 | 46.8 | 33.7 | 21.1 | 14.1 | 18.2 | 24.1 | 47.5 | 30.0 |
| 20% | Extract | 55.9 | 48.3 | 37.1 | 26.8 | 17.7 | 14.5 | 18.0 | 23.7 | 36.2 | 18.7 |
| 20% | Breakout | 41.8 | 45.1 | 38.7 | 29.1 | 18.4 | 13.7 | 17.8 | 23.5 | 34.7 | 14.2 |
| 40% | Supply | 66.5 | 59.3 | 59.3 | 43.5 | 30.5 | 15.9 | 17.9 | 23.5 | 52.1 | 34.6 |
| 40% | Extract | 57.4 | 49.7 | 50.9 | 36.2 | 23.5 | 15.0 | 18.1 | 23.7 | 43.5 | 26.0 |
| 40% | Breakout | 47.1 | 47.6 | 49.8 | 38.4 | 30.2 | 21.0 | 18.5 | 23.6 | 42.6 | 22.1 |
| 60% | Supply | 69.5 | 66.0 | 66.5 | 50.7 | 40.2 | 20.6 | 18.8 | 24.2 | 59.3 | 41.8 |
| 60% | Extract | 62.4 | 57.1 | 53.7 | 43.2 | 32.5 | 19.5 | 18.5 | 23.8 | 48.0 | 30.5 |
| 60% | Breakout | 51.8 | 54.5 | 54.4 | 45.2 | 38.9 | 32.1 | 24.4 | 24.0 | 49.0 | 28.5 |
| 80% | Supply | 78.5 | 68.9 | 63.3 | 61.3 | 45.1 | 25.7 | 20.7 | 25.8 | 61.0 | 43.5 |
| 80% | Extract | 74.2 | 59.8 | 55.8 | 49.9 | 37.8 | 24.4 | 20.5 | 23.9 | 52.4 | 34.9 |
| 80% | Breakout | 57.6 | 57.6 | 56.4 | 52.0 | 43.7 | 38.0 | 31.6 | 25.6 | 52.2 | 31.7 |
| 100% | Supply | 75.7 | 70.8 | 67.1 | 65.7 | 48.2 | 30.4 | 23.6 | 27.8 | 64.6 | 47.1 |
| 100% | Extract | 75.6 | 62.9 | 59.5 | 53.1 | 42.2 | 29.4 | 24.3 | 24.7 | 55.7 | 38.2 |
| 100% | Breakout | 64.3 | 59.8 | 60.3 | 56.8 | 47.1 | 42.2 | 36.9 | 28.8 | 56.4 | 35.9 |
As above with the acoustic solution fitted. Tested to BS EN 13141-7:2010.
Ecodesign product fiche: Kinetic FH
| Parameter | Value |
|---|---|
| SEC class | A+ |
| SEC value ('Average') | -42.51 |
| SEC value ('Warm') | -17.25 |
| SEC value ('Cold') | -87.39 |
| Declared as | RVU/BVU |
| Speed drive | Variable speed |
| Type HRS | Recuperative |
| Thermal efficiency (%) | 90 |
| Max. flow rate (m³/h) | 331.2 |
| Max. power input at max. flow rate (W) | 168 |
| LWA: sound power level (dB) | 61.03 |
| Ref. flow rate (m³/s) | 0.064 |
| Ref. pressure difference (Pa) | 50 |
| SPI [W/(m³/h)] | 0.30 |
| Control factor (CTRL) | 0.65 |
| Control typology | Local demand control |
| Max. internal and external leakage rates | <5% internal, <5% external |
| Annual electricity consumption, AEC (kWh/a) per 100 m² | 2.04 |
| Annual heating saved, AHS average (kWh/a) per 100 m² | 46.93 |
| Annual heating saved, AHS warm (kWh/a) per 100 m² | 21.22 |
| Annual heating saved, AHS cold (kWh/a) per 100 m² | 91.82 |
Commission Delegated Regulation (EU) No 1254/2014. Model IDs (stock refs) 408167 and 408169.
SAP PCDB performance: Kinetic FH
| Configuration | SAP 2009 thermal efficiency % | SAP 2012 thermal efficiency % | SAP 2012 SFP (W/l/s) |
|---|---|---|---|
| K+1 | 90 | 89 | 0.47 |
| K+2 | 89 | 88 | 0.54 |
| K+3 | 88 | 86 | 0.65 |
| K+4 | 87 | 84 | 0.84 |
| K+5 | 85 | 84 | 1.01 |
Spare filters: Kinetic FH
| Model | Filter part no. | Grade |
|---|---|---|
| Kinetic FH | 409764 (PK2) | G3 |
| Kinetic FH | 472153 (Single) | M5 |
Filter size 184 x 328 mm.
Accessories & controls
Wired Remote Controller
- Part no. 443283
- Duplicates the features of the on-board control panel
- Supplied with 15 m of cable (maximum length)
- Flush mounting, suits a single-gang pattress box 16 mm deep
Plug-in integral humidity sensor
- Part no. 441838
- Plug-in sensor for the Sentinel Kinetic range
Wireless enable kit and additional wireless switch
- Part no. 441865 (receiver and one wireless switch)
- Part no. 437827 (additional switch, up to four may be connected)
Vent-Wise accessory pack
- Part no. 441780
- Requires sensors
LED alarm with 15 m cable
- Part no. 448356
- Remote LED that lights when any message is visible on the unit's display
Opto-Coupler
- Part no. 447340
- Converts the basic 5 V BMS output to volt-free
Isolator relay controller
- Part no. 442030
- Isolates the fan unit from other mains circuits when used with trickle/boost or light switch control
Boost switches
- Part nos. 449060 (with light indicator), 437320 (stainless steel), 455213 (standard)
- Single-gang wall switches that select normal or boost
- Part no. 448929: momentary push switch that boosts the unit for 30 minutes
Humidity and air quality sensors
- Part no. 563550: ambient response humidity sensor, 30%-90% RH
- Part no. 563532: Ecotronic humidity sensor, adjustable set point
- Part no. 563506: air quality sensor, surface mounted
Visonex PIR sensor
- Part no. 459623
- Fits a UK single-gang box
- Timer overrun adjustable from 5 to 25 minutes
- Detection range up to 10 metres
Acoustic Purge Fan and Acoustic Purge Fan XL
- Part nos. 477988 and 479829
- Can be used with a Sentinel Kinetic unit or on its own via a switched live or 0-10 V sensor input
Anti Vibration Mounts
Part no. 68MP033G
Troubleshooting
Fault code 01: supply fan not running
Likely cause: Supply fan not running
What to do: Note the code and contact the service provider, quoting it. Do not remove the unit's covers.
Fault code 02: extract fan not running
Likely cause: Extract fan not running
What to do: Note the code and contact the service provider, quoting it. Do not remove the unit's covers.
Fault code 04: control PCB 24 V fuse (FS1) failure
Likely cause: Control PCB 24 V fuse (FS1) failure
What to do: Note the code and contact the service provider, quoting it. Do not remove the unit's covers.
Fault code 08: temperature sensor fault
Likely cause: Temperature sensor fault
What to do: Note the code and contact the service provider, quoting it. Do not remove the unit's covers.
Fault code 16: temperature sensor fault
Likely cause: Temperature sensor fault
What to do: Note the code and contact the service provider, quoting it. Do not remove the unit's covers.
Fault code 32: wired remote control failure
Likely cause: Wired remote control failure
What to do: Note the code and contact the service provider, quoting it. Do not remove the unit's covers.
More than one fault code at once
Likely cause: Code numbers are added together when more than one fault is detected
What to do: Quote the total code shown on the display to the service provider.
Service Phone and Fault Code screens alternate on the display
Likely cause: A fault has caused the unit to switch off
What to do: Phone the service number shown on the display for assistance and quote the fault code.
Room Too Cold, Fan Off
Likely cause: The heating has failed or been switched off and the internal temperature has fallen below 5 °C, so the unit has stopped to avoid bringing cold air into the house
What to do: The unit restarts every hour for a short run to measure the temperature, and returns to normal operation once the property warms up, for example when the heating is back on.
BMS Mode, Fan Off
Likely cause: A Fan Off command has been received from a building management system, for example in the event of a fire alarm
What to do: The command is issued by the building management system, not by the unit.
Defrost Active, Airflow Mode
Likely cause: Supply air temperature is between 0 °C and -20 °C, so antifrost operation has started to prevent frost forming on the heat exchanger
What to do: Antifrost operation is automatic. On bypass models it can be set to Airflow Mode (default) or Bypass Mode if negative pressure is not permitted during antifrost operation.
Check filters displayed
Likely cause: The filter check interval set at commissioning has elapsed
What to do: Inspect, clean or replace both filters, then hold the up and down buttons for 5 seconds to clear the message.
At a glance
- Unit type
- MVHR
- Manufacturer
- Vent-Axia
- Product range
- Lo-Carbon Sentinel Kinetic MVHR range
- Versions
- FH: summer bypass and integral humidity sensor
- Handing
- FH made as right-hand (408167) and left-hand (408169) versions
- Acoustic options
- Acoustic enclosure, acoustic top box, or both
- Mounting
- Wall-mounted, upright; ducting vertical, horizontal or both
- IP rating
- IP22
- Energy class (FH)
- SEC class A+
- Manufacturer's guarantee
- 2 years from date of purchase, for products installed and used in the UK
- 331.2 m³/hMaximum flow rate, FH (ErP product fiche)
- 90%Thermal efficiency, FH (ErP product fiche)
- 168 WMaximum power input at maximum flow, FH
- 61.03 dBSound power level LWA, FH
- G3, 184 x 328 mmStandard filters, 2 fitted (ISO 45% Coarse)
- 125 mmDuct spigot diameter
Vent-Axia Sentinel Kinetic F and FH features
FH
Summer bypass
When the house is warmer than the set indoor temperature (16-40 °C, default 25 °C) and the outside air is cooler, a damper lets outdoor air skip the heat exchanger. It only works while the outdoor temperature is above 14 °C (adjustable), and it contributes to cooling rather than replacing it.
Evening and night-time purge
Bypass models can run at boost speed through the evening, stopping after at most 5 hours, or through the night, to flush warm air from the house while outdoor conditions allow.
Integral humidity sensor
Fan speed rises in step with relative humidity, and the sensor also reacts to small but rapid rises, so a steamy bathroom or kitchen is cleared without the whole system running at boost. A night-time setback reduces nuisance tripping as humidity creeps up with falling temperature.
Acoustic enclosure and top box
An optional acoustic enclosure reduces breakout noise and an optional acoustic top box reduces in-duct noise, each available as a factory-built version of the FH.
All models
Frost protection
With supply air between 0 °C and -20 °C the unit cuts the supply airflow and raises the extract rate to stop ice forming on the heat exchanger. At -20 °C or below the supply fan stops and the extract fan runs at a reduced rate.
Boost and purge
Pressing the front boost button once, twice or three times gives 30 minutes, 60 minutes or continuous boost, and holding it for 5 seconds starts a 2-hour purge at 100% fan speed.
Multiple control inputs
Boost can be triggered from a 240 V switched live, five pairs of switch terminals, a 0-10 V proportional input, a wireless switch or a wired remote controller. A building management system can also command the fans off.
Filter reminder
The display shows Check filters at the interval set at commissioning, and the reminder is cleared from the control buttons once the filters have been dealt with.
Room-too-cold protection
If the heating fails and the internal temperature falls below 5 °C, the unit stops so it does not draw cold air in. It restarts every hour to measure the temperature and resumes normal running once the property warms up.
Building dry-out mode
A dry-out status runs the unit at maximum flow for one week (168 hours) and counts the time down on the display.
Installing the Vent-Axia Sentinel Kinetic F and FH
Mount the unit on a wall, always upright, with duct connections leaving vertically, horizontally or both. Fix the supplied metal bracket to a wall that can carry the 19 kg unit, fit the stand-off feet from the accessory bag, then hang the unit by locating its two steel wall bushes on the bracket. Keep a maintenance access area of 360 mm x 560 mm clear in front of the unit, and do not use the unit to support other equipment. In an unheated space, insulate the unit and its ducting.
The condensate pipe is fixed with a worm-drive clip to a 22 mm vertical pipe and must connect to the building's foul water drainage through a U-bend trap with at least a 60 mm water seal (or a HepVo valve), falling at least 3 degrees. Insulate the pipe if it runs through a cold void. The drain can leave through the back, side or bottom of the unit, and the final connection is made outside the unit after installation.
- Do not install the unit where the atmosphere is excessively oily or greasy, where corrosive or flammable gases, liquids or vapours may be present, where it may be sprayed with water from hoses, or where ambient temperature may exceed 40 °C or fall below -20 °C.
- Intake air must come from outside the property, and the unit must not be connected directly to a tumble drier.
- Open the supply and exhaust valves fully before commissioning, and allow at least 5 minutes for the unit to stabilise when changing between boost and normal speeds.
- Installation and the electrical connection must be carried out by suitably trained and qualified persons, with a local double-pole fused spur (3 A fuse, at least 3 mm contact separation) to isolate the supply. Switch the unit off at the mains before any cover is removed.
- Follow the manufacturer's full installation, operation and maintenance instructions for wiring diagrams and commissioning settings.
