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Domus Silavent HRX-D

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Domus Silavent HRX-D
£864.00 including VAT Excluding VAT £720.00
Domus Silavent HRX-D heat recovery unit


Domus Silavent HRX-D

New and improved unit that replaces the HRX-B range

Whilst the Silavent HRXD is extremely light in weight (11.5kg), its energy efficient performance hasn’t been compromised. Providing Specific Fan Powers as low as 0.66W/(l/s) and a heat exchange efficiency up to 86%, the unit will lower Dwelling Emission Rates for a higher SAP rating. Offering control functions such as frost protection, temperature and humidity control, auto thermal bypass and independent fan speed control, the Bluebrain controller boasts a full complement of air quality and commissioning controls for improved air comfort.


  • Bluebrain digital controller
  • Internal humidity sensor
  • Extracts up to 300 m3/hr @ 100 Pa
  • Suitable for houses up to 150 m2
  • Up to 88% thermal efficiency
  • Suitable for houses up to 150M2
  • summer bypass
  • 2-year warranty
  • 'A' energy rating
  • Contoured EPP construction

Intelligently manages air conditions

Digital humidity control aiding homeowner comfort Through advanced AMIE technology, unlike typical humidity sensors, the Bluebrain HRXD controller will enable occupants to have direct control over managing the humidity levels in their home - to suit personal comfort levels. By accurately measuring air humidity, the HRXD’s extract speed automatically changes from background to boost as the level of humidity increases, thereby providing optimal ventilation performance. Advanced thermal bypass control Perfect for night time cooling or during warmer periods, the HRXD controller detects when the air temperature reaches a pre-set level and intelligently activates the thermal bypass mechanism to maximise the effect of maintaining fresh and filtered air. The thermal bypass is also programmable by time, for additional convenience and comfort

Commissioning made easier

Engineered to include independent speed control, the Bluebrain control allows quick and accurate commissioning through simple speed adjustment buttons.

Automated filter maintenance and replacement reminders

Ease of maintenance and filter replacement is an important consideration when choosing MVHR – not only to ensure performance of the unit is maximised and air quality maintained, but also for peace of mind.

The HRXD Bluebrain control removes this concern by providing helpful maintenance reminders for cleaning its filters.

Building Management Systems (BMS)

The HRXD controller incorporates volt free contacts for fault and filter cleaning indication, to work with a Building Management System

Summary of control features

• Includes advanced AMIE technology (Air Management for Indoor Environments)
• Power indicator
• Status indicator (frost protection, thermal bypass, etc.)
• Fault indicator with diagnostics
• Independent fan speed control
• Switched live inputs (signal triggers): - Mains level x 2 - Volt free to boost x 2 - Volt free to max x 1
• 3 variable speeds
• Clean filter indicator
• Frost protection
• Built in humidistat
• Run on boost timer
• Delay ‘on’ boost
• Pre-commissioning filter protection
• Discreet run monitor
• Lockable commissioning mode
• BMS features: - Pre-heater activation output - Remote shutdown - System healthy monitor and fault signals
• Time and date display
• Real time air temperature display
• Real time extract air humidity level display
• Easy to read, contemporary digital

Benefits of working with BPC Ventilation

  • Authorised Polypipe 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 tab

Polypipe Domus Silavent


Heat Recovery efficiency %



Digital control panel

Humidity control

Internal humidity sensor

Airflow rate Max m3/h


Airflow rate @ 100Pa m3/h


Max dwelling size M2


Max room extraction

Kitchen plus 5 extraction points

Specific fan power (lowest)

0.69 wls

Dimensions W x H x D (mm)

564 x 755 x 290





Summer Bypass 

Yes - Thermal

Frost protection 

Yes - Motor

Sound level @3m db.(a)

18 to 47



Ductwork connections


Duct Diameter

4 x125mm

Condensate drain




Country of manufacture

Developed and manufactured in the UK

Heat exchanger

Counterflow heat exchanger (PVC)

Available room sensors

Humidity, Timer



SAP Appendix Q


Fireplace mode


Alarm system integration


Passive House


ERP rating




Download Documentation
Silavent HRX Catalogue
Silavent HRX Installation Instructions

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