Mechanical Ventilation with Heat Recovery (MVHR) systems are becoming increasingly common in both new builds and retrofit projects, particularly where improving air quality or addressing damp issues is a concern. In new homes, where airtight construction is now standard, MVHR systems are essential for maintaining indoor air quality while preserving the energy produced by heating systems such as air source, ground source, or air-to-air heat pumps. These systems work by extracting stale, warm air from the home and using it to preheat fresh incoming air via a heat exchanger, which can save over 90% of energy.
For homeowners or self-builders, navigating the options offered by contractors can be challenging, especially with a wide range of prices. The reason for this price variation often comes down to the quality of the design and installation. A properly designed system must comply with building regulations, ensuring a minimum ventilation rate of 0.3 litres per second per square metre of space. Additionally, the system should handle specific extraction rates for kitchens, bathrooms, and utility areas, while maintaining balanced airflow throughout the rest of the house.
To achieve this balance, it is crucial to use rigid or semi-rigid ductwork, not flexible ducts. Flexible ducting may be cheaper initially, but it is prone to collapsing once other trades have installed their services or insulation is placed between joists. This compromises airflow and reduces efficiency. Imagine trying to breathe through a straw instead of a garden hose restricted airflow puts unnecessary strain on the MVHR system, reducing its lifespan and leading to costly repairs or replacements.
Investing in a proper installation ensures your system operates efficiently and lasts longer. The saying “buy cheap, buy twice” is particularly relevant here, as improperly installed ductwork hidden in ceilings and floors will be extremely costly to rectify later.
To learn more or see the difference for yourself, book a visit to our showroom by emailing info@lynxac.com or calling us on 01522 788799. Please note, visits are by appointment only.
