Providing fresh air ventilation, reducing buildings' energy costs and CO2 emissions

Monodraught’s MVHR systems are designed to supply tempered fresh air to any built space ensuring the correct oxygen levels are maintained whilst expelling stale air. By simultaneously recovering heating or cooling energy to temper incoming air, the systems are able to significantly reduce power consumption and associated building running costs.

Why choose Monodraught Mechanical Ventilation Heat Recovery systems?

The system is designed to automatically provide trickle ventilation, heat recovery ventilation and secure night time cooling.  It also boosts levels of ventilation during summer or during periods of high CO2.

The MVHR system can complement natural ventilation provided by being integrated with manual or automatic windows/louvres, either via a single sided or cross flow ventilation strategy. The system comprises an intelligent and fully automatic control system which switches between operational modes dependent on external/internal temperature conditions and indoor air quality (IAQ).

Monodraught provides a Mitsubishi Lossnay heat exchanger core with or without a high quality acoustic shroud.  As a result, the MVHR system can be installed in a range of exposed or concealed locations, such as direct façade or ducted applications. 

Download Brochure

The Benefits of Fresh Air

  • It is proven to give you more energy and a sharper mind leading to better concentration
  • It improves your mental wellbeing
  • It is good for your blood pressure and heart rate
  • It strengthens your immune system and cleans you lungs

On the other hand, poor indoor air quality can be attributed to many problems inside a building. Excess humidity causes dampness, rot and mould, whilst pollutants are known to be a major cause of damaging health issues such as asthma and eczema. Stale air is also believed to lead to a loss in productivity and low morale.


Monodraught MVHR can be installed in new buildings or retrofited to existing ones, from small modular areas to large open plan rooms. The system can be suspended below a ceiling (a floor to ceiling height of 2.6 m or greater is recommended), within a false ceiling void, or to an exposed void.

Each MVHR system includes CO2 monitoring as standard and can accurately control the level of fresh air within classrooms to provide the ideal teaching environment. The MVHR- 100 has been specifcally designed to meet the requirements of BB101 and Priority School Building Programme (PSBP).

Retailers are under increasing demand to slash their energy consumption. Due to its heat recovery capability the MVHR is seen to provide a cost effective ventilation approach.

The MVHR system can operate on its own to provide fresh air ventilation to provide a comfortable enviroment that even the most demanding client might expect, but still reduce running costs.

The MVHR system has been designed to meet the requirements of clients who wish to have a fresh and comfortable environment with low energy and maintenance costs. With a wide range of system sizes and performance the ideal system for any sized office can be selected.


ErP Directive
The Ecodesign Directive for Energy Related Products (ErP) is European legislation adopted in 2009 to improve the environmental performance of any products that use energy or that are related to energy consumption. All fans, including those integrated into other products, with an electrical power input between 30W and 500kW are subject to this legislation which has been implemented over two stages. The implementation of the first stage took place on the 1st January 2013 and set out the first tier of minimum energy efficiency requirements. The second stage has been effective since the 1st January 2015 and called for a higher level of minimum energy efficiency requirements for fans.

Part F
Part F of the Building Regulations focuses on ventilation systems and indoor air quality in both domestic and commercial buildings. It covers all aspects of specifying and designing a ventilation system and gives guidance on installation, commissioning, operation and maintenance. Minimum ventilation rates are also advised within the document, e.g. a minimum air supply rate of 10l/s/person (litres per second, per person) is advised in offices.

Part L
Part L of the Building Regulations calls for buildings to be more airtight and energy efficient. As a result, maintaining good indoor air quality through effective ventilation is vital and MVHR systems are perfect to achieve this in an energy efficient manner. Part L covers the maximum amount of electricity a mechanical ventilation system should use and more specifically what the fan motors in a unit should use (Specific Fan Power (SFP)). Furthermore, figures for minimum energy efficiency for heat exchangers in heat recovery systems are outlined for non-domestic buildings. Currently Part L calls for heat recovery systems with plate heat exchangers, installed in non-domestic buildings, to be at least 50% efficient.

Need any help?