Nuaire MRXBOXAB-ECO4 Heat Recovery System

Out of stock


Nuaire MRXBOXAB-ECO4 Heat Recovery System


  •   Out of Stock

From €22.03 €18.36

To €5,037.41 €4,197.84

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€1507.80 €1256.5
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Nuaire MRXBOXAB-ECO4 Heat Recovery System Kit

Nuaire MRXBOXAB-ECO4 MVHR unit complete with DIY Radial Ducting kit

Please note - You can purchase the heat recovery unit with or without the ductwork on this listing

Our Comprehensive DIY Kits have everything you should require installing a top-quality Heat recovery system to building control regulations.  

This heat recovery unit and Standard semi rigid radial ducting kit meets the highest and latest Building Regulation requirements and are suitable for newly constructed homes and renovation projects

Please call our sales team on 028 2827 5150 / +353 1526 7452 if you would like more information about upgrading your kit


  • Nuaire MRXBOXAB-ECO4 heat recovery unit 
  • Quiet-Vent Semi Rigid Radial Ducting 
  • This system with provide a quiet and efficient system that is suitable for any competent or trades-person to easily install  
  • All products in kits can be changed to suit your specific needs
  • Free Technical support by our in-house technical team (multiple telephone lines)
  • Free design service, Our In-house designers can provide an easy to follow plan to building control standards with required air flow rates
  • Commissioning, we have a network of commissioning engineers or we can supply you with a DIY air meter including a commissioning guide 
  • Installation, the systems are suitable for any competent person to install but we also have a large network of installers if required throughout the UK and Ireland if required
  • Kits and products are in stock ready for delivery
  • Any products not required can be returned (excluding return delivery cost)
  • Any extra products required will be discounted to the Kit Price (excluding delivery)

Nuaire MRXBOXAB-ECO4 Heat Recovery Unit

The MRXBOX-ECO4 (previously MRXBOX95AB-WH2) is Nuaire's largest capacity residential heat recovery unit, providing both an optimised and balanced supply and mechanical extract ventilation with heat recovery of up to 95% for large properties of up to 300m2 / 3000ft2 in size.  It has an extremely low Specific Fan Power (SFP) rating, low running costs, and uses low voltage DC fans but can effectively and quietly ventilate the kitchen and up to eight wet rooms.  


  • Up to 95% Heat recovery
  • Meets the latest building control regulations
  • Integral humidity sensor
  • Automatic Summer Bypass 
  • Compact and Lightweight
  • Suitable for houses up to 300m2
  • Specific fan power as low as 0.62 wls
  • Fully serviceable unit with all parts accessible
  • 5-year warranty: 1-year parts and labour, remaining years parts only
  • Dimensions (HxLxW): 710 x 710 x 585 (mm)


The unit uses 2 x G3 filters that can be cleaned or replaced


The unit can be controlled by manual speed settings on the unit with additional boost switches and sensors or with the use of an optional 3 speed controller

The units have two speeds and is adjusted manually by a boost switch, the fans can be independently adjusted at the unit with potometers located at the front of the unit, All versions have the following functions integrally mounted within the fan unit on a purpose made PCB, all such components pre-wired and factory fitted by the manufacturer: 
• Independent control of background supply and extract flow rates
• Independent control of boost speed supply and extract flow rates
• Integral heat exchanger frost protection
• Integral adjustable run on timer
• Fan failure indication
• Integral S/L terminal for boost from remote switch, e.g. light switch
• Indication and controls – The unit also has clear LED visual indication for maintenance, servicing and operation mode, i.e. summer bypass, frost protection

Integral Humidity Sensor

Measures humidity/moisture in your bathroom(s) and kitchen and will automatically boost ventilation when humidity is above normal


Constructed of EPP with an exterior cover


The unit features 2 x low energy, low volume DC motors


We recommended this unit is installed onto a secure wall

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


As well as a choice of compatible ducting system there is also a full range on sensors, controllers, in line silencers and floor/wall/ceiling inlet and out valves are all available to complete your installation

Benefits of working with BPC Ventilation

  • Number 1 leading MVHR and ventilation system specialists
  • Large range of systems for domestic and commercial applications
  • Authorised Nuaire distributors
  • In-house design service
  • Full technical support
  • 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

Technical Specification

Nuaire MRXBOXAB-ECO4 Technical Specification





Heat Recovery efficiency %


Digital Controller


Boost Switch control


Interactive control


Humidity control

Internal sensor

Airflow rate Max m3/h


Airflow rate @ 100Pa m3/h


Max dwelling size M2

300 (uk)

Max room extraction

Kitchen plus 7 extraction points

Specific fan power (lowest)


Dimensions W x H x D (mm)

710 x 710 x 585




Yes  - 2 x G3

Pre/ Post Heater


Summer Bypass 


Frost protection 


Sound level @3m db.(a)



Floor / wall

Ductwork connections


Duct Diameter

4 x 200mm

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




Ducting Kit Info

Quiet-Vent Semi Rigid Ducting Kit

Ducting Kit Contents (180mm)   Part Number   12 Point  13 Point   14 Point   15 Point   16 Point   17 Point   18 Point 
125mm metal extract valve MW124   5  5  5  6  6  7  7
125mm metal supply valve MW125  7  8  9  9  10  10  11
180mm x 2 meter metal duct P180M-2   4  4  4  4  4  4  4
180mm B90 vent pressed bend B90180M  10  10  10  10  10  10  10
180mm NP vent male coupling C180MM  8  8  8  8  8  8  8
Metre foil backed glass fibre insulation INS22  4  4  4  4  4  4  4
180mm exterior grille s/steel louvered cowl 9041227  2  2  2  2  2  2  2
Standard 75mm x 50 meter regular radial duct (75mm) RK75/50  4  4  5  5  6  6  6
90° Plenum with additional 350mm round pipe (Quiet-Vent) QV75PLEN90  12  13  14  15  16  17  18
Standard sealing ring (pack of 10) (75mm) RL75   3  3  3  3  4  4  4
QV 15 pt rear entry distribution box 150 spigot (75mm) QV75-15180RE  2  2  2  2  2  2  2


BPC have years of experience in delivering equipment around the UK and other Worldwide destinations. Our dedicated dispatch 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 £250 to any mainland UK or Ireland address  

Worldwide Delivery

Worldwide delivery is possible on almost all our products at low 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 48-72 hrs, depending on method of transport, for hundreds of stock items.

Customers receiving a pallet delivery will be emailed on day of dispatch advising of delivery date. Parcel deliveries will be notified via email or SMS directly from DPD.

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.

Delivery Partners

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

  • Fastway
  • DPD
  • Montgomery Transport
  • Liam Connolly Roadfreight Ltd
  • Europa Worldwide


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Installation Service

If you would like to learn more about our installation service, please contact us:

Call us on 028 28 275 150 or click below to contact us online

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Distributors for the worlds leading ventilation manufacturers

We are distributors and stockists of the leading ventilation products