What is MVHR: an Introduction to Heat Recovery Ventilation
Modern buildings, be they domestic, commercial or industrial, are designed to be as airtight as possible. Building them in this way minimises unintentional air leakage, preventing warm air from escaping a property.
Whilst that’s great for lowering energy costs and carbon emissions, there’s a negative knock on effect - inadequate ventilation. Throwing open windows and doors is not an ideal solution, since it overrides the purpose of an airtight building, and in some commercial and industrial settings, is simply not an option.
MVHR stands for mechanical ventilation with heat recovery, and helps meet the ventilation needs of energy efficient buildings.
What is the Purpose of MVHR?
As the name suggests, MVHR systems are dual purpose. Their role in energy efficient buildings is to provide:
Mechanical ventilation - the extraction of stale indoor air that can contain pollutants, allergens, odours and humidity, and the introduction of fresh, filtered air from outdoors.
Heat recovery - the recovery of otherwise wasted heat from the indoor air extracted.
MVHR systems can recover up to 90% of this otherwise wasted energy, so when these two processes work together, you have a constant supply of clean air that requires less energy to bring up or down to the desired temperature.
The result is a healthier indoor environment, reduced utility bills, and a lower carbon footprint.
How Does an MVHR System Work?
Without going into too much technical detail, MVHR systems work by way of ducting and a heat exchanger.