Build Tight & Ventilate Right is the mantra of the Energy Savings Trust, so that's exactly what we offer. MVHR with airtight insulation.
Eliot Warrington, Founder
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Nuaire MRXBOX95-WM2
MVHR, 89% Efficient, Wall Mounted, 93l/s

The MRXBOX95-WM2 is a wall hung MVHR unit with automatic summer bypass and optional humidistat sensor to provide automatic fan speed adjustment, dependant on the relative humidity detected in the property.

Designed for medium sized properties the MRXBOX95-WM2 features include:

  • 5 year Nuaire warranty
  • Up to 89% heat recovery
  • SAP Appendix Q eligible
  • Ultra quiet, low energy, long life EC fan motors
  • Automatic frost protection, air intake disabled if incoming air below zero (optional)
  • Integrated humidity sensor to automatically increase air flow when required (optional)
  • Automatic summer bypass to disable heat recovery in warm weather
  • Manufactured in the UK to high specification

Solarcrest design, supply, install (optional) & commission MVHR systems for self-builders & retrofitters around the UK. Independent from any one manufacturer we'll provide the ultimate hybrid system that's super quiet, efficient & effective.

Nuaire MRXBOX95-WM2Download the MRXBOX95-WM2 brochure
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call us for an MVHR heat recovery ventilation quoteCall 01625 423020 for MVHR help

Our price: 800.00 each
(960.00 inc.)
Product details ..
Nuaire MRXBOX95-WM2
MVHR, 89% Efficient, Wall Mounted, 93l/s

Code for Sustainable Homes

The efficiency of the Vent-Axia Sentinel Kinetic range has been independently verified by the Building Research Establishment (BRE). All units offer between 86% and 89% heat recovery and are listed in the SAP Appendix Q database. The MRXBOX95-WM2 units are ideal for new build properties required to meet CfSH level 3 or above.

Download the MRXBOX95-WM2 SAP test data

Building Regulations

All the Nuaire MRXBOX95 units are compliant under Part F & L of the 2010 Building Regulations.

Physical Dimensions

Whole House MVHR units are often bulky items which can be difficult to fit through an existing loft hatch. Thanks to their detachable spigots and compact light weight design the Nuaire MRXBOX95 range are particularly suited to retrofit installations. Please check the installation manual for dimensions.

Automatic frost protection

The MRXBOX95-WM2 has an automatic frost protection. If the outdoor temperature drops below 0C the air intake is disabled and the unit serves as an 'extract only' system until the weather improves.

Summer Bypass

An automatic summer bypass is available for the MRXBOX95-WM2 unit as a factory fitted optional extra or can be installed at a later date. If the outdoor air temperature exceeds 20C the heat recovery function is automatically disabled. Under these conditions the unit provides fresh filtered air throughout the property to help reach a comfortable temperature.

Integral Humidity Sensor

The integral humidity sensor incorporated within the extract fan chamber will automatically boost both the extract and supply fan, to the commissioned boost speed, when the humidity level exceeds that set by the front panel mounted adjustment potentiometer .o


The Nuaire models have 2 fully adjustable air flow speeds and a purge setting, 100%. On the front of the unit there are adjustable potentionmeter that allow for the flow speeds to be set within the performance range. The system will run on its normal setting unless a manual boost switch is activated or the hummidity increases which will activate the boost setting. Solarcrest provide a nationwide supply, installation and commissioning service with BPEC certified installers. We also provide commissioning only, required under 2010 regs, if you prefer to install the system yourself. In which case we can provide installation guidance by telephone and email. Don't forget, draughty trickle vents and airbricks will not be necessary with an MVHR.


Unlike many MVHR units the G3 air filters in the Nuaire range only require an annual inspection and clean, normally with a vacuum cleaner. The filters are covered in a removable protective film to prevent them being clogged up prior to occupant handover. The MRXBOX95-WM2 has a unique filter design that can be easily removed from the front panel (even within restricated spaces). Other than the filter inspection the MVHR is a fit and forget item. The MRXBOX95-WM2 comes with a 5 year warranty for added peace of mind


Solarcrest will assess your floor plans and ventilation requirements in order to recommend the most appropriate MVHR system. We'll then provide accurate budget costs for the supply, installation and/or commissioning of the system to current building regs. Subject to an initial deposit we release our proposed ducting design and air flow specification for consideration by your building inspector. Subject to approval we can normally have the complete system on site within a week.

If you need any further help or advise with your MVHR purchase please don't hesitate to call 0845 833 0388 or email