Choosing the right Mechanical Ventilation with Heat Recovery (MVHR) unit is essential for achieving healthy indoor air quality, optimal comfort, and long-term energy efficiency. Whether you’re designing a new build or upgrading an existing property, this guide will help you make an informed decision.
1) Calculate Your Required Airflow:
Determine the required airflow rate based on the size of your building, its occupancy, and ventilation standards or regulations applicable in your area. This calculation will help you identify MVHR units with the appropriate capacity to meet your needs.
➤ Need help calculating airflow? Request help from our MVHR experts.
2) Reparability:
Not all MVHR units are equal. For example, with some cheaper models or brands, essential components such as fans cannot be easily replaced, which may mean the entire unit has to be replaced!
➤ Chat to our team about finding an MVHR unit that’s built for long-term reliability
3) Evaluate Heat Recovery Efficiency:
The heat recovery rate measures how effectively the system reuses heat from extracted air. Look for models with high heat recovery rates, typically above 90%, to maximise energy savings and maintain indoor comfort.
➤ Compare our high-efficiency MVHR units designed for Passivhaus, low-energy builds and retrofits.
4) Prioritise Air Filtration:
Choose units with high-quality filters to remove dust, pollen, and other airborne particles. Superior filtration protects occupants with allergies and enhances overall air quality.
5) Consider Noise Levels:
If the MVHR unit is installed near living or sleeping areas, select a quiet model with low dB ratings. Check whether the system includes acoustic insulation or attenuators to further reduce sound.
6) Plan for Space and Installation:
Check the dimensions of your chosen MVHR unit and ensure there’s adequate space for ducting, maintenance, and airflow. Compact or ceiling-mounted models may be ideal for smaller homes.
➤ Explore our turn-key MVHR installation service or download our MVHR Brochure.
7) Look at Control Options:
Modern MVHR units offer smart controls that adjust airflow based on humidity or CO₂ levels. Choose a system that integrates with home automation or offers remote monitoring for convenience.
8) Research Brand Reputation and Warranty:
Select a manufacturer known for reliability and aftersales support. Read reviews and confirm the warranty period – typically 2–5 years. Brands with proven track records such as Zehnder offer peace of mind and easier access to replacement parts.
➤ Chat to our expert team to find out more about Zehnder and choosing a quality brand.
9) Balance Cost and ROI:
While higher-end models may cost more upfront, they often provide better efficiency and lower running costs over time. Compare life-cycle costs to ensure you’re getting the best value.
10) Consult the Experts (That’s Us!):
If you’re unsure which MVHR unit best suits your project, our Earthwise specialists can help. We offer turn-key MVHR solutions, from design and supply to full installation and commissioning – ensuring your system performs at its best.
Final Thoughts
By considering airflow, efficiency, noise, filtration, and installation, you can select an MVHR unit that delivers the ideal balance of comfort, health, and energy performance. With expert guidance, your system will run efficiently for years to come – protecting both your indoor air and the planet.
