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Xpelair Stratum S120QVI Heat Recovery Unit

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Xpelair Stratum S120QVI Heat Recovery Unit
£1,008.00 including VAT Excluding VAT £840.00
Xpelair Stratum S120QVI Heat Recovery Unit


Xpelair Xcell Stratum S120Q heat recovery unit- 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 70m2,

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


  • Meets the latest building control regulations
  • Passive house approved
  • Up to 90% Heat recovery
  • Summer Bypass 
  • Specific fan power as low as 0.62 wls
  • Compact and lightweight EPP design
  • Fully serviceable unit with all parts accessible
  • 5-year warranty: 1 year parts and labour, remaining years parts only 


2 x G5 high quality easy to clean or replace filters


The unit can be controlled by an integral programmable digital 3 speed controller and timer


B1 fire rated EPP construction with high U value


The unit has Long life, low energy ultra EC constant volume motors


ceiling or floor Installation is recommended 

The Condensate drain is fitted to the bottom of the unit, we recommend that a flexible connection is fitted between the drain and overflow pipe


In addition to a choice of compatible ducting systems a full range of controls, sensors, in-line silencers, floor/wall/ceiling inlet and outlet diffusers are available to complete the installation.

Benefits of working with BPC Ventilation

  • Authorised Xpelair distributors
  • In-House design service
  • In-House Technical support
  • Specialists in easy to install DIY systems
  • 1000s of products in stock in our own warehouse
  • Large showroom with working units on display
  • Installer network throughout the UK and Ireland
  • All systems comply to all the latest building control regulations 
  • 0% Finance available 
Technical Specification

Technical Specification

Xcell Stratum S120Q specification


Excell Stratum S120Q



Heat Recovery efficiency %


Digital Controller


Boost Switch control


Interactive control


Humidity control

Optional room sensors

Airflow rate Max m3/h


Airflow rate @ 100Pa m3/h


Max dwelling size M2

70 (uk)

Max room extraction

Kitchen plus 2 extraction points

Specific fan power (lowest)


Dimensions W x H x D (mm)

826 x 550 x 240


11 kg


Yes  - 2 x G5

Pre/ Post Heater


Summer Bypass 


Frost protection 


Sound level @3m db.(a)



Floor / ceiling

Ductwork connections


Duct Diameter

4 x 125mm

Condensate drain



5-year: 1 year parts and labour, remaining years parts only

Country of manufacture


Heat exchanger

Counterflow heat exchanger (PVC)

Available room sensors

Humidity, Timer, Pir





SAP Appendix Q


Fireplace mode


Alarm system integration


Passive House


ERP rating




Download Documentation
Xpelair Stratum Catalogue
Further Information

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


World Wide Delivery Service

BPC have years of experience in delivering equipment around the UK and other Worldwide destinations. Our dedicated customer service team work hard to ensure the highest standards are met so that your goods arrive on-time and in pristine condition.

Our market knowledge and experience allow us to match our service to meet your requirements swiftly and safely.

Free Delivery

We offer free delivery on any order over £200 to any mainland UK or Ireland address

Worldwide Delivery

Worldwide delivery is possible on almost all our products at very low delivery costs, Delivery to countries outside the EU are normally delivered to the nearest customs office, port or terminal for the purchaser to collect and complete custom clearance

Please contact us to confirm shipping cost and availability 

End-To-End Support

Delivery is available within 48 hrs in most cases for hundreds of stock items. Our customer service teams always contact customers to confirm when delivery is required and to check that the goods can be received. Any problem from the customer’s end is accommodated and arrangements changed.

These checks are part of a unique commitment to building relationships with customers, understanding their specific delivery needs and responding to them positively and promptly.

We deliver on Service

  • Key components such as Ductwork and fittings plus the most popular selling MVHR units are kept in stock in our UK-based warehouse, which means that you receive the best possible delivery dates.
  • All goods are expertly packed by a professional team so that your equipment is received in pristine condition ready for installation.
  • All deliveries co-ordinated to suit your specific requirements and construction programme.
  • Specialist team fully conversant with all documentation requirements for a smooth order and delivery service.

Delivery Costs

Please click here to view delivery costs

Delivery Partners

We only use the couriers with the highest standard of service that include

  • DPD
  • Parcelforce
  • Pallet Network
  • Speedy freight

Delivery Serivices