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Vent Axia Highflow COMMERCIAL Heat recovery Kit

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Vent Axia Highflow COMMERCIAL Heat recovery Kit
Inc Vat £3,348.00 Excluding VAT £2,790.00
Vent Axia Sentinel Kinetic Highflow (408449)

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Vent Axia Highflow Commercial heat recovery Kit

  • Free hard wired digital control
  • Free Design Service*
  • Free Technical Support

New X Large heat recovery unit from leading manufacture Vent Axia with Automatic Summer Bypass and integral humidity sensor

This top quality unit has every conceivable option for controllability with proven durability and performance

  • Up to 91% Heat recovery
  • 575 m3/h @150pa suitable for houses with Max floor area of 350m2
  • Specific fan power as low as 0.59 wls
  • Ultra Quiet motors
  • Integral digital Controller
  • Summer Bypass  
  • 100% Adjustable air flow rates
  • Integral humidity sensor  
  • Vertical or Horizontal duct options
  • Right hand side model with external pipes on right hand side of unit
  • Left had side model available at same cost (408451)
  • G3 to M5 pollen filter options
  • Frost protection
  • Multiple control options
  • SAP Appendix Q listed
  • Developed and manufactured in th UK

   *Free design service to small commercial on acceptance of system

Suitable for numerous commercial applications that can include*

Application GuideMax SizeCalculation* 
Office - - 12 office staff & nbsp;8 l/s per person
Classroom -  - 12 students8 l/s per person
Shop / Retail -  - 20 people or 70m25 l/s per or 5m2 of area
Nursing Home -  - 350 m20.5 ACH
Nursery Crèche - - 50 m2 3 ACH
M/P sports hall -  - 11 occupants10 l/s per person low activity
Domestic Pool -  - 75 m22 ACH

* calculations can differentiate depending on location always check with the local authority

Technical Specification

Technical Specification tab

    Vent Axia Kinetic Highflow heat recovery unit - 408449
  • Up to 91% Heat recovery
  • Max Air flow 700m3/h
  • 575m3/h @150pa
  • Counter-flow heat exchanger (pvc)
  • suitable for houses with Max floor area of 350m2
  • Specific fan power as low as 0.52 wls
  • Dimensions (mm) 635 High x 785 long x 550 wide
  • Weight 34 kg
  • Wall or floor mounted
  • SPL db(A)@3m :- 20%=22  40%=33  60%=37
  • Filtration options G3 / M5 /
  • Frost protection  
  • Fault code indicator
  • control options of switched live / No volt / 0-10v / delay on  
  • Timer options  
  • 100% Adjustable air flow rates
  • Integral humidity sensor  
  • programmable summer Bypass
  • Vertical or Horizontal duct options
  • Left hand side model available- with external pipes through LHS (408451)

Material List 

Part NumberDiscription4pt Kit6pt kit8pt kit
 C3004WP 300mm 4 Way with OBD and 200mm Plenum   8  
  P200M  250mm x 3 Meter Pipe   8
  B90200M  250mm B90 Bend   20
  C200M 250mm Male Connector   8
  T200 250mm to 200mm Tee   6
  INS22ROLL  1.2 x 18meter foil backed glass fibre insulation   1
  CLP200  200mm plenum with 250mm ex louvre with mesh   2
  IFD250  10m roll 250mm insulated flexible ducting   2
  ST50  Roll silver foil tape   6
  BS50  Roll builders strap 10 meter   4
  SE380  Sealant - grey duct   3
 JC250  Jubilee clip 150-250mm (Pack of 10)   2 
 DS13 Box 1000 s/drill screws 12mm  1

Download Documentation
Vent Axia Highflow Catalogue
Vent Axia Kinetic Installation instructions
Further Information

How to install a Vent Axia Kinetic Highflow

Vent Axia Highflow Wiring Requirements

  • 3amp switched spur beside unit

  • Digital controller- Comes complete with 15 meter of 6 core alarm cable with a RJ45 connection

  • Optional boost switch - 3 core 1.mm cable from recessed single box to unit(recommended if bathrooms are further than 10 meter 

  • Further optional include - light switch, vent-wise controller, 


  • The low and high speed levels can be adjusted using the digital control

  • further controls include- night time set speed set back - timed boost- sensor control - humidity sensor control - tempature control - summer bypass control - fault indication - filter indicator

Installation Guide

Vent Axia Highflow 1st Fix

  1. Position vent axia Highflow unit proverbially on a wall or vertical timber frame with provided wall bracket

  2. It is possible to take pipes from either the top of side of unit

  3. Duct connections RHS unit -rear left is extract from house-front left is supply air to living areas- rear right is air intake from outside - front right is air to outside

  4. Install wiring for controllers (see bottom of page for further details)

  5. Install condensation drain from unit to internal or external drain

  6. Install wall /Soffit vents or roof vents (Minimum 1.5 meter apart) Pipes are 180mm diameter

  7. Position distribution boxes in the chosen location (proverbially in a central location minimizing duct lengths )

  8. Install silencer (if specified) to air supply distribution box

  9. Install solid rigid ductwork and between distribution boxes and MVHR unit, (If possible allow for insulated flexible ductwork for final connections of MVHR unit )

  10. Install radial pipe into the distribution box ,

  11. Cut to length and install pipe into ceiling plenum, (insure you install rubber seal onto pipe) secure pipe in place with fixing band or pipe clips

Warning! There can be either one or two pipes going from the distribution box to the plenum depending on the required airflow , Always check plan that will indicate 1 or 2 pipes Install insulated rigid or insulated flexible ductwork to external vents Seal all open pipes to prevent debris and moisture ingress


Vent Axia Highflow 2nd fix

  1. Trim ceiling Plenums to height of plasterboard (Easier to do before plastering ceilings)

  2. Install air valves to plenums (slightly open valve by two turns)

  3. Install all controllers

  4. Check that condensation drain has been fitted

  5. Switch unit on and follow the set up procedures

  6. Check air flow rates and commission system

Initial Design -

Pre designed plan - Please follow the plan ensuring the correct number of pipes to each area - Please note the plan is only a guide and you may have to reroute pipe work differently and reposition valves to suit layout of rooms

No Plan - If a design is not possible due to renovation, Retrofit or properties with multiple obstacles simply follow the listed recommendations

We would recommend that you

  • Install 2 x pipes from the distribution box to the room air plenum if air flow requirement exceed 10 L/s or if length over 15 meters  

  • Install 2 x pipes from the distribution box to the air extract plenum in the main shower rooms and Kitchen

  • All other areas only require a single pipe from the distribution box to the room air plenum

  • Radial ductwork is suitable to be fitted below your loft insulation providing superior heat retention Insulate any ductwork or Manifold/ Distribution boxes with a minimum of 25mm thermal duct wrap that go above insulation in unheated attic spaces

  • Slim-line manifolds are suitable for installation to concrete ceilings and only require a 100mm service void

  • Position supply plenums approx. 500mm from corner of wall (avoid areas above beds and wardrobes)

  • Position extraction plenums to outside of showers and above kitchen sink (not cooker)

  • Only extract from a room with a open appliance (stove) if there is a supply with equal or higher airflow


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