The Pros and Cons of Mechanical Ventilation with Heat Recovery (MVHR)
Mechanical ventilation with heat recovery (MVHR) systems have become increasingly popular in recent years as an energy efficient way to ventilate homes and buildings.
While there are certainly many advantages to using MVHR, there are also several disadvantages that should be taken into consideration. But before we delve into its main pros and cons, let's have a quick look at what this heating and ventilation technology actually is.
What is Mechanical Ventilation with Heat Recovery (MVHR)?
MVHR is a ventilation system that uses a heat exchanger to transfer heat from the stale indoor air to the fresh outdoor air.
The system works by extracting stale air from bathrooms, kitchens, and other humid areas and passing it through a heat exchanger to recover the heat before expelling it outside. At the same time, fresh outdoor air is drawn in and passed through the heat exchanger, where it is preheated before being distributed to living areas.
The heat exchanger is designed to allow the transfer of heat while preventing the mixing of the two air streams.
The concept of heat recovery ventilation has been around for many years, with the first systems dating back to the 1970s. However, it wasn't until the 1990s that MVHR technology became more widely used in properties across the UK, particularly in high-performance, low-energy buildings.
Since then, the technology has continued to evolve and improve, with more efficient and effective systems being developed to meet the changing needs of building owners and occupants.
So, now we know what it is, what are its benefits and what are its drawbacks?