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Xpelair Dimplex ZL 400VF

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Xpelair Dimplex ZL 400VF
£1,560.00 including VAT Excluding VAT £1,300.00
Xpelair Dimplex ZL 400VF - 96540VF


Xpelair Dimplex ZL 400VF - 96540VF

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

A quality passive house approved unit built to German standards suitable for houses up to 220m2,

Triple filtration with independent 100% summer By-Pass filter and a counter-flow heat recovery cell up to 91% efficient.

Constant volume feature in this unit guarantees that the preset air flow rates are achieved independent of any resistance in the duct system or filter condition.

Strong but lightweight EPP construction that allows for floor or wall mounting in cold areas

  • Up to 91% Heat recovery  
  • Passive house approved
  • Counter-flow heat exchanger
  • 420 m3/h @100pa suitable for houses with Max floor area of 220m2
  • Max Airflow of 445 m3/h
  • Specific fan power as low as 0.60 wls
  • Noise level (dba@3m) 29 to 44
  • Summer Bypass  
  • 100% Adjustable air flow rates
  • 3 x G4 filters
  • Frost protection
  • Multiple control options
  • 5 Year Warranty
  • Developed and manufactured in the UK
  • Dimensions (mm)750 x 665 x 455
  • Weight 35 kg

 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 
Download Documentation
Xpelair Dimplex Zl 400VF Catalogue
Xpelair Dimplex Zl400VF Installation
Further Information

How to install a Xpelair Dimplex ZL400 

Xpelair 400 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 - tempature control - summer bypass control - fault indication - filter indicator

Installation Guide

Xpelair 400 1st Fix

  1. Position Xpelair 400 unit proverbially on a wall or vertical timber frame with provided wall bracket

  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 150mm diamater

  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 ductwork and between distribution boxes and MVHR unit, (If possible allow for insulated flexible ductwork 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 ductwork to external vents Seal all open pipes to prevent debris and moisture ingress


Xpelair 400 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