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Xpelair Xcell Stratum S120Q

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Xpelair Xcell Stratum S120Q
£900.00 including VAT Excluding VAT £750.00

Xpelair Xcell Stratum S120Q - 92923AW



Xpelair Xcell Stratum S120Q - 92923AW

Horizontal Mechanical ventilation with heat recovery (MVHR) unit with summer bypass.

A quality Horizontal unit built to German standards suitable for houses up to 110m2,

Lightweight EPP low profile construction that allows for loft and ceiling void installation

  • Up to 90% Heat recovery 
  • 170m3/h @100pa suitable for houses with Max floor area of 180m2
  • Specific fan power as low as 0.69 wls
  • Summer Bypass  
  • 2 x 100% Adjustable air flow rates
  • G4 filters
  • Frost protection
  • Multiple control options
  • SAP Appendix Q listed
  • 5 Year Warranty
  • Developed and manufactured in the UK to German standards
  • 4 x125mm Spigot
  • Dimensions (mm) 826 x 550 x 240
  • Weight 11kg

 Suitable with use with QVI 3 speed controller, humidity sensor or air quality sensor

Benefits of working with BPC Ventilation

  • In-House design service
  • Largest range of heat recovery systems
  • Technical support including live chat
  • Specialists in easy to install DIY systems
  • All products in stock in our own warehouse
  • Large showroom with working units on display
  • Free delivery to any UK Mainland or Location
  • Delivery also available to any worldwide location
  • Installer network throughout the UK and Ireland
  • Authorised suppliers and distributions for all products
  • All systems comply to all the latest building control regulations 
Technical Specification

Technical Specification tab

Xpelair stratum range catalogue page 2

Download Documentation
Xpelair Stratum Catalogue
Xpelair Stratum Installation
Further Information

How to install a Xpelair Dimplex S120 Horizontal unit

Xpelair S120 Wiring Requirements

  • 3amp switched spur beside unit

  • Humidity sensor to bathrooms- 3 core 1.0mm flex from unit to humidity sensor

  • Digital controller- Comes complete with 15 meter of 8 core cable


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

  • further controls include-timed boost- sensor control - humidity sensor control - temperature control - summer bypass control - fault indication - filter indicator

Installation Guide

Xpelair S120 1st Fix

  1. Position Xpelair S120 unit either on floor or ceiling

  2. Install wiring for controllers (see top of page for further details)

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

  4. Install wall /Soffit vents or roof vents (Minimum 1.5 meter apart) Pipes are 125mm diameter

  5. Position distribution boxes in the chosen location (proverbially in a central location minimising duct lengths )

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

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

  8. Install radial pipe into the distribution box ,

  9. 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 duct work to external vents Seal all open pipes to prevent debris and moisture ingress


Xpelair S120 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 duct work is suitable to be fitted below your loft insulation providing superior heat retention Insulate any duct work 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